Best Design: The Z-Bar Mini LED Desk Lamp

The slender Z-Bar High Power LED Desk Lamp features high-tech power-saving LED bulbs in a minimalist frame. With its angular black aluminum housing and unique pivot, it belongs on a Berlin engineer’s desk or in the lobby of an upscale New York architect.

The ingenious design extends beyond aesthetics; this is a seriously bright light that uses very little energy. The Z-Bar’s six daylight white LEDs generate about 240 lumens of light and only expends 9 watts of energy.

If 9 watts is still too much energy usage for your taste, activate the built-in 4-step dimming function to produce a softer light for even less wattage. This feature works incredibly well when you are unwinding prior to bedtime. Lower the light before you fall asleep to adjust your brain to get ready for bed.

The thin circular base is weighted to keep the light from tipping over, and adjustable joints can be placed in almost any position without tightening or loosening knobs or screws, simply move the light to where you need it and the lamp will hold to form.

The Z-Bar is the winner of I.D. Magazine “best of category” award. It is available on Amazon for around $300.

Best Overall: Lumiy Lightblade 1500S

If you find your desk lamp’s brightness underwhelming, buy a Lightblade and let there be light. This is the LED desk lamp for those who want only the brightest crispest replica of perfect natural light. With 1100 lux of brightness and a high CRI, the Lightblade can transform even the dreariest space into a warm and bright zone of productivity.

The Lightblade’s radiant lighting comes from its cool and warm white LED’s for a color rendering index of over 90 CRI. A light’s CRI determines its ability to accurately display an object’s full color. The higher the CRI, the more faithfully the color is displayed as if it would be in natural light. The Lightblade’s high CRI makes it a perfect choice for artists and other professionals who require brilliant vibrant colors.

The lamp has other desirable features, including an omnidirectional pivoting head for better control of the lighting. It also has touch sensors that control brightness and monitor energy expenditure.

The Lumiy Lightblade 1500S is available on Amazon for about $100.

Best Value: TaoTronics Smart LED Desk Lamp

The TaoTronics LED Desk Lamp is perfect for those who want bright light at an affordable price. 30 dollars gets you  410 lumens of power and up to 11 levels of brightness, perfect for any setting. The best feature of this lamp is its versatility. It includes 5 color modes, which function as temperatures that you can adjust depending on your need. The soft uniform light is ideal for reading and doesn’t flicker like other value options, while the natural light is perfect before bed. It also has an incredible lifespan. According to the manufacturer, this lamp is rated to last for 50,000 hours and uses 75% less energy than incandescent lights with similar brightness.

The Smart LED desk lamp also looks elegant.  An adjustable gooseneck gives further control over light positioning and brightness, while the blend of silver metal looks modern and can fit in any room. 

The TaoTronics LED Desk Lamp is available on Amazon for about $30.

Most Customizable: The Softech DL-90 Multi-Function LED Desk Lamp

Softech‘s latest LED desk lamp offers an astounding amount of customization for total brightness control. You decide the lighting mode you want and the DL-90 will conform to your request. The lamp has 27 high-power daylight LEDs with a 90+ CRI that comes extraordinarily close to natural light.

The lamp has four distinct lighting modes and 40 brightness levels in total for total precision. The first two modes are for desk work: a reading mode with mid-range colors (4300K-5300K) that are easy on the eyes, and a study mode which has a high range color temperature (6000K-7000K). The lamp can also be switched to a relaxation mode and a sleep mode — these have softer, warm color temperatures.

This lamp uses 10 watts or less of power to provide light equivalent to a 100-watt incandescent bulb. It lasts about 40,000 hours or 20 years of normal use. An automatic turn-off feature extends lamp life even further.

The Softech DL-90 lamp is available from Amazon for about $70.

Most Versatile: BYB E-430

Clamp-on desk lamps are a great option for those working who need high-quality illumination but are working with limited desk space. The award-winning design of BYB’s E-430 dimmable LED desk lamp delivers energy-efficient lighting from a slender device latched onto the side of your desk. It has a swivel lock socket that tilts in any direction, whether it’s on the desk or not. The adjustable arm is matched by a flexible head and includes built-in dimming strips.

It delivers 4 lighting modes and 6 levels of brightness, ranging from study mode to bedtime mode. We also like that the lamp is rated for 50,000 hours and comes with a 5-year warranty.

The BYB E-430 is available on Amazon for around $110.

Best Smart Design: TaoTronics TT-DL27 Desklamp

Take advantage of four distinct lighting modes with this versatile smart LED desk lamp from TaoTronics. You can set the lamp to sleep mode, study mode, reading mode, or relax mode, each delivering a customized LED distribution designed to satisfy your needs. And if study mode is likely to become sleep mode, you can just activate the 1-hour off timer on the lamp to make sure it shuts off as you drift to sleep.

I also enjoyed that you can swivel, rotate, and bend the head and neck of the lamp to fit your lighting needs. Just tilt the head to activate a wide 62cm2 area of light, enough to illuminate your entire desk area. The metal arm and sturdy base are hallmarks of great construction, making sure the light doesn’t fail on you.

The TaoTronics LED Desklamp is available for around $35.

The post The Best LED Desk Lamps appeared first on Reactual.

• The best pair of binoculars is the Carl Zeiss Victory HT Binoculars. They are the brightest binoculars available, and sport a robust and ergonomic design. There is no better option for bird watchers and hunters.
• Nikon Monarch 5 offers a much more affordable yet comparable quality pair of binoculars.
• The best pair of compact binoculars for hikers and everyday use are Bushnell Legend Ultra HD.

The Details

Stellar improvement in binocular technology has leveled the optical playing field. Specialty brands such as Swarvorski and Zeiss still have an edge over their lower priced competitors, but the gap has narrowed enough that you can comfortably purchase a mid-range option without losing much in the way of clarity, color, durability, and ergonomic design.

There are a few important considerations to weigh when picking out a pair of binoculars, and what option is best for you depends on whether you will be gazing at stars or birds.

The optical specification of a pair of binoculars is represented by a number that looks like a basic multiplication equation. 8×42 and 10×42 are the standard binocular specifications, and are the numbers that are best for general purpose use.The first number, which is invariably the smaller of the two, refers to the magnification power of the binoculars. It represents how many times larger the object will appear through the lens than it would to the naked eye.

The second number is the objective lens diameter, which is the larger piece of glass at the front of the binoculars. Objective lens diameter determines how much light is let in. The larger the lens diameter, the more light is let in. Photographers can think of it like aperture on a camera lens. A larger lens also means the binoculars will be heavier, which might compromise how long you are able to hold them steady. Increasing upper arm strength is a great solution to this problem, and will allow you to hold a pair of binoculars for longer while enjoying more light.

Field of View

The field of view is determined by the size of the eye piece and represented in degrees. Therefore, a 7.0 degree field of view would be 7 out of a 360 degree circle.  Wide angle are 7 or more degrees, while standard binoculars are around 5 degrees.

As magnification goes up, the field of view goes down. Birders will sacrifice some field of view for increased magnification. If you want to take in scenic panoramas, opt for a wide angle lens.

Other Factors To Consider

Get a pair of binoculars with a long eye relief if you wear glasses. Eye relief is the vertical distance to which your eye is supposed to sit, and is measured in millimeters. 13-15mm is considered a long eye relief, and the minimum a bespectacled individual would want to comfortably use the binoculars.

Reactual readers will also want to take note of the lens coating. The objective lens will be protected by an anti-reflective coating to minimize glare when light hits the surface. Fully multi-coated lenses are the best for performance and durability, as they enhance clarity, maintain integrity of color, and protect the lens from scratch and other damage.

We also highly recommend you choose a pair of binoculars that is waterproof or, at the very least, water-resistant. Even if you don’t plan to use your binoculars by water, fog and moisture in the air could potentially damage your pair.

Zeiss Victory HT: The Best Binoculars For Hunters and Birders

If you have the money to spare, there is no better pair of binoculars available than Zeiss Victory HT. The manufacturer is a specialty optics company with more than 200 years of binocular manufacturing expertise, and the Victory HT are engineered with precision to deliver the brightest color and most ergonomic design of any pair of binoculars. Released in 2012, Victory HT are made in Germany with the best products and most advanced technology.

They are the brightest premium binoculars in the world. They are the highest contrast and deliver more than 95% light transmission, 5% higher than other premium binoculars on the market. This jump is thanks to the new Schott High Transmission glass, which is exclusive to Zeiss. Schott has been developing special optical glass for more than 125 years, and their HT glass has the highest transmittance levels of any optical lens. This cuts down on a phenomenon known as “thermal lensing effect” and increases blue spectral range, which is particularly helpful in low-light situations.

Hunters and birdwatchers benefit most from the extra color in low light situations, as the HT glass makes the most of deep twilight. The lenses are protected by anti-fogging material which keeps them clear in the early morning cold. The extra color is still noticeable in general daytime use, but the difference is not as drastic as in dim or low-light viewing. If you plan to use your binoculars in daytime, the extra price tag is probably not worth the incremental improvement in color crispness.

The ingenious design of the Zeiss Victory HT sets it apart from competitors. It has a compact bridge and a large easy-to-use focus wheel. The comfort grip system allows you to grasp both optical tubes without a hinge in front of binoculars, and a long eye relief provides a comfortable viewing experience for those with and without glasses. It also has a double hinge feature which increases durability by minimizing the chance of breaking and a robust chassis that is made from lightweight magnesium.

The biggest drawback of the Zeiss Victory HT is obviously the price. Some commenters noted that other premium priced binoculars come with better kit (case, cleaning cloth). The lifetime warranty and 5 year no fault policy do provide some peace of mind for dropping so much on a pair of binoculars.

Zeiss also offers the Victory HT in 10×42, which gives you stronger magnification at the expense of a few degrees in field of view. Another option is the 10×54 version of the Victory HT, which Zeiss launched in 2014. Much lighter than other models with such a large objective lens diameter, this option is great for stargazers and deer hunters who need to make the most of nearly non-existent light.

Another Option For Bird Watching: Nikon Monarch 5

If you are willing to sacrifice color quality, Nikon’s Monarch 5 Series offers near identical image quality for a fraction of the price. It is a mid-level binocular with multi-coated Nikon ED (extra-low dispersion) lens that delivers sharp, high-contrast views. The ED Glass lenses and Dielectric High-Reflective Multilayer Prism Coating were previously reserved for Nikon’s more expensive models, but are available in the Monarch 5 series.

They have a 6.4 degree field of view, and maintain image sharpness outside of a 5 degree diameter up to 80%.

The exceptional design of Monarch 5 is durable and intuitive. It is very light, though not as light as Zeiss (21 oz versus 16 oz). The focus knobs are precise and smooth, very easy to adjust and find the best clarity. We appreciate the fully waterproofed rubber armored fog proof housing, which make this a durable and comfortable pair of binoculars to hold.

One complaint Monarch 5 owners have is that the lens cap is loose fitting, which leads to many lost caps. Nikon assures that this was an intentional design choice, but it nonetheless leads to problems.

 Best Compact Binoculars For Everyday Use: Bushnell Legend Ultra HD

Compact binoculars are lightweight and portable, perfect for hiking and general use while travelling. Any pair with an objective lens diameter smaller than 30mm is considered to be compact.

Bushnell Legend Ultra HD offers stunning HD image, thanks to ED Prime Glass. They are coated with anti-reflective lens and are secured in a lightweight magnesium chassis that is waterproof and fogproof. 

The post The Best Binoculars appeared first on Reactual.

The Details

Tower air filters, frequently using HEPA technology, are designed to reduce exposure to indoor irritants and allergens such as dust, cigarette smoke, pollen, pet dander, mold and mildew spores and other particulate matter. Effective air filtration is especially important for those with allergies or respiratory problems such as asthma. Studies show that those who suffer allergies are often sensitive to multiple allergens, making it nearly impossible to remove environmental triggers without the use of technology such as air filters using the HEPA technology.

HEPA (high-efficiency particulate air) filters work by forcing air through a fine mesh designed to trap particulate that can escape standard filters found on HVAC systems. Many tower air filters contain a HEPA filter, and as air is pulled into the tower by a fan, it is pulled through the filter where particulate is trapped and then clean air is forced back out. HEPA filters are remarkably effective at eliminating environmental irritants, capturing 99.9% of airborne impurities 0.3 microns in diameter, or larger.

Consider the air change rate (ACH), which defines how many times the portable air filter will clean an entire room’s air during one hour. An ACH of 5, for example, indicates the air will be cleaned every 12 minutes.

Another factor to consider is the CADR ratings, which is the clean air delivery rate. This identifies how powerful a tower air filter is. CADR indicates how many cubic feet of air the unit can filter in one minute. You may see ratings for CADR related to irritants such as dust, pollen and smoke on the tower air filter’s packaging. Look for higher numbers if you have a large space, or consider purchasing more than one tower air filter. Here are the best standalone air filters.

The Best Overall Stand-Alone Air Filter: RxAIR Plus

For most people, a stand-alone air filter is a convenient way to cut down on air pollution and minimize annoying affects of allergies. For others, an air filter is a literal lifesaver, killing airborne bacteria and viruses. If you have a weak immune system, go with RxAIR Plus, an air purifier trusted by hospitals around the world.

This high end air purifier harnesses the germicidal ultraviolet light (UV-C) to clean the air as well as germs and viruses ranging from H1N1, TB, and the flu. In addition to a 99% elimination of airborne bacteria and viruses in a space of up to 800 sq. ft, the RxAir uses a system of traps and baffles to catch large particles such as pet dander and dust.

The unit comes with a 5 year warranty that places cartridge replacement. Replacement cartridges are available to keep the machine running at max efficiency even after 5 years. The RxAir Plus comes with a whisper-quiet fan that allows it to purify the air without causing a lot of disturbance, and you don’t have to worry about changing out the filters.

The Best Stand-Alone Air Filter For Value: GermGuardian True HEPA AC4825

This best-selling unit is an all-around good value, offering true HEPA filtration, a charcoal filter to reduce common odors, and UV-C light technology to kill bacteria and germs. The unit is Energy Star qualified, meaning it meets the strict energy efficiency guidelines set by the US EPA.

Air cycles through three stages to ensure maximum effectiveness. First, air is filtered through a pre-filter and charcoal filter to capture large particles and remove odors. Then, air is filtered through the HEPA filter, capturing 99.97% of airborne particles larger than 0.3 microns. In the last stage, UV-C light kills airborne viruses and bacteria, and titanium dioxide destroys the molecules that cause odors. Common viruses and bacteria that can be killed by the UV-C light stage includes rhinovirus, E. coli and streptococcus, responsible for millions of illnesses each year.

One downside is that it does require an air filter change every 7 months. The GermGuardian tower air filter includes an indicator light that blinks when it’s time to replace the filter or bulb.

The Best Compact Stand-Alone Air Filter: Honeywell QuietClean Compact Tower Air Purifier

The compact Honeywell QuietClean weighs just 1 pound, is 12.6 x 17.8 x 10.5 inches, and has a built-in handle, making it easily transportable and ideally suited for any tight space, including a nightstand, table or you can place it on the floor. It is whisper quiet, has two speed settings that can be set via an easy control knob on the top of the unit, and a permanent, washable iFD filter.

IFD (intense field dielectric) filters are a honeycomb of hollow air channels with floors and ceilings alternately charged or grounded via embedded electrodes to create a powerful, polarized electrical field inside the air channels which can trap 99.99% of particulate matter 0.3 microns or larger, including virtually all viruses, bacteria and spores. The iFD filter can be removed from the unit, easily washed with water and reused, so it never needs replacing.

The Honeywell QuietClean has a CADR rating of 40, meaning it can filter 40 cubit feet of air per minute, ideal for smaller rooms up to 62 square feet. The energy efficient design requires only as much electricity as a small light bulb to run, reducing your energy costs as compared to many other models. Air is effectively filtered through the unit 5 times per hour.

The Best Standalone Air Filter For Allergies: Honeywell True HEPA Allergen Remover

The Honeywell True HEPA Allergen Remover tower air filter is the number one recommended model by allergists, and the Honeywell brand is recommended by 7 out of 10 physicians who recommend the purchase of an air filter. This portable unit weighs just 21 pounds, making it simple to carry from room to room via built in handles on the sides. It can circulate the air in a 21’ x 22’ room up to 5 times per hour, and has a powerful CADR rating of 300, meaning it can clean up to 300 cubic feet of air per minute. There is an activated carbon pre-filter to help reduce common household odors, such as those caused by pets or cooking.

The unit features easy tap electronic controls, 3 cleaning levels and a turbo clean setting. A timer can be set to shut off automatically after 2, 4 or 8 hours, and there are built in electronic filter replacement reminders. A light/LED dimmer control on the top of the unit makes it easy to determine the operating status even in the dark. This unit functions most efficiently in a medium to large sized room and includes a true HEPA filter, guaranteeing 99.97% of allergens and other irritating particulate will be removed from the indoor environment.

The post The Best Standalone Air Filters appeared first on Reactual.

The best mouse pad is the Artisan Hien mouse pad. This Japanese-made pad has a unique woven surface that allows for very precise mouse movement.

The Details

The mouse pad enthusiasts over at Reddit say that Artisan mouse pads are the best you can buy. What gives these mouse pads their edge is their woven surface. It’s a special polyester which provides a very precise reaction to mouse movements — useful for everyday computing or during game action. The fabric also resists dirt and moisture, and there is a non-slip material on the bottom of the mouse.

Artisan mouse pads come in four different level of friction. Here’s Artisan’s humorously translated description of these levels:

HARD: It is near the taste made of the plastic. However, it is not too hard like plastic.

MID: It is not soft. However, it is not hard. Light gliding and the stopping are good balances.

SOFT: Soft more than usual cloth pad. It stops in sharp. Stopping with rigidity feeling.

XSOFT: It is considerably soft. This flexibility provide the stopping performance on the surface.

Typically, the Soft or Mid levels are good for everyday mousing.

The Artisan Hien mouse pad is available from Amazon for about $20.

The post The Best Mouse Pad appeared first on Reactual.

• The GermGuardian AC482522 is the best portable air filter available
• One of the air filters doctors recommend most, the Honeywell True HEPA Air Purifier is the best air filter for allergies
• The Holmes Desktop Purifier is the best value portable air filter

The Details

A portable air filter is a device that is used to purify the air in a room of impurities and pollutants. Air filter statistics from the Center for Disease Control (CDC) and Environmental Protection Agency (EPA) have shown that the air inside your home can be five to ten times dirtier than the air outside, and Americans spend an average of 90% of their lives indoors.

Portable air filters are intended to target specific contaminants, decreasing the levels in which they are detected in the room. In order to do this, the air is passed through one of more filters to remove dust, lint, germs and other pollutants. In a stationary (non-portable) purifier, the filter is inserted into the air return vents in a home. These materials include foam, fiberglass, cotton and synthetic fibers. A portable air filter is more versatile, and the same materials and methods are used in many of the best portable filters.

Some of the most popular air filter types are HEPA air purifiers, air filters that use activated carbon filters and others that use charged media filters. When purchasing a portable air filter with HEPA technology, it is important to look for one with a genuine HEPA filter, or “true” HEPA filter. Some may be advertised as “HEPA-like,” but these do not meet the high standards of a true HEPA filter.

Here are three of the best portable air filters on the market today.

The Best Overall Portable Air Filter: Germ Guardian AC4825

The GermGuardian AC482522 is just 22” in height and weighs a tiny 7 pounds, making it easily transportable from room to room. It features three fan speeds, is ultra-quiet and is best suited for medium sized rooms. The CADR rating is 100+, meaning it can clean more than 100 cubic feet of air in one minute.

This tower-like product from Guardian Technologies is the best available portable air filter on the market. The AC4825 uses three different filters that screen out almost all undesirable particles from the air by using multiple filters and systems.

First, the pre-filter uses activated carbon to remove odors and gases from the home. It also captures larger pieces of dust and pollen. The second filter is a True HEPA system that removes pet dander, dust mites, mold spores and pollen. True HEPA filters must meet strict guidelines to be classified as such. Therefore, you can be assured that the HEPA system in the GermGuardian filters out almost 100% of airborne particles as small as 0.3 microns. Lastly, the air is passed through short range UV light, also known as UV-C. This UV light is effective in killing germs and viruses such as E. coli and streptococcus.

The Best Portable Air Filter For Allergies: Honeywell Air Purifier

The post The Best Portable Air Filter appeared first on Reactual.

The Details

Summer is coming. Whether you want to watch the new season of Game of Thrones in the backyard or show MLB games on your bar’s patio, a projector is a great alternative to outdoor TV. You get a much larger screen size and some peace of mind, knowing that you can take the projector inside with you at night.

While there are no projectors specifically designed for outside use, there are a few elements that determine if a projector is suitable for the great outdoors. The main factor is brightness, which is determined by the lumen count. Anything less than 2000 lumens won’t hold up to outdoor ambient lighting — so get something north of that number. For daytime use, you want over 4000 lumens for a decent image. The good thing about high lumen projectors is that they also cast a larger screen, which is great for backyard movie nights and other big gatherings.

So do you a need a screen specifically designed for projectors? Nope! Any flat surface will do, although it is better if that surface is white and contour free. Go ahead and string a sheet up between two trees, or point the projector at the side of your house.

If you have want the clearest possible image, outdoor projection screens are available and do an excellent job of maximizing contrast and perfecting the entertainment experience.

The Best Large Screen Projector

Hold on to your hats. The Optoma EH500 3D DLP Projector is a blindingly bright 4700 lumens, which means it gives true HD images on 300 inch screens without a problem. So cast the game or a movie on a 3 story wall and impress your guests.

Using Texas Instrument’s DLP BrilliantColor technology for multi-color processing and native 1080p HD resolution, the Optoma EH500 gives a stunning picture in 10,000:1 contrast ratio. This is ideal for presentations and DIY drive in movie theaters. An array of connectivity options- including VGA, HDMI, and USB- make it easy to get your media on the screen.

Don’t be afraid to bring it outside. It can operate in temperatures as low as 40 degrees and as high as 100 degrees, making it suitable for a variety of climates. It has a projection distance of 1-10 meters, which allows for a good deal of flexibility. It also has front, rear, ceiling, and table top projection.

The downside of the Optoma EH500 is its short run-time. It is made for six hours on and six hours off, which means it is not the best for sports bars that want to show back-to-back games on their patio. The high lumen count also means that bulb life isn’t as long as we’d like — just 2500 hours on regular setting.

The Optoma EH500 projector is available at Amazon for about $1200.

The Best Outdoor Projector

A good outdoor projector is light enough to be lugged around, bright enough to cut through some ambient lighting, and equipped with options to make alignment a pain-free process. It should also be affordable enough that, should the worst happen, you aren’t out an entire car down payment. BenQ’s HT2050 satisfies all these requirements and more, projecting true HD images on screens up to 180 inches in size.

The latest in BenQ’s line of quality affordable projectors, the HT2050 is a 1080p Full HD projector with a 15000:1 image contrast ratio. At 2200 lumens, it is bright enough to use outside with some ambient lighting, but can’t be used during full daylight like the Optoma EH500. At night the black levels are very good for this price range, but do fade away a bit with ambient lighting. It uses 3D DLP.

This is not a short throw projector. The throw range is 1.15 to 1.5 meters, but from the furthest distance you can achieve an image size of almost 200 inches, which is massive and will satisfy a crowd of hundreds of people.

It has vertical lens shift and keystone correction, which helps with set up. Most projectors at this price range do not have horizontal keystone correction and lens shift, and unfortunately this projector is no exception. The zoom is about standard for this class, as are the HDMI and USB connectivity.

It weighs about 10 pounds, which is light enough to easily be brought over to a friend’s house and for easy storage.

BenQ’s HT2050 projector is available at Amazon for about $800.

The Best Outdoor Projector Screen

Invest in a projector screen if you want a professional and polished viewing experience. Good outdoor projectors are weather resistant to an extent, but you will still want something portable that you can disassemble in inclement conditions or if not in use. Elite Screens Yard Master 2 is a great outdoor option. The screens are durable and can be put up and broken down with ease. Sold in many sizes, they can be set up indoors and outdoors, just like your projector.

The Elite Screens Yard Master is a snap button single-piece frame supported by detachable aluminum legs and frame. Full tension gives the screen taught appearance reminiscent of a theater viewing experience, and black masking borders provide additional contrast for the best possible image.

Ground stakes, rigging cords and support rings help the Yard Master 2 stand up to moderate gusts of wind. The screen is also made for the outdoors, and can weather a spontaneous rain shower. It comes with a carrying bag for easy transportation.

The post The Best Outdoor Projectors and Projectors For Large Venues appeared first on Reactual.

The IP Code is an international standard that rates a product’s protection against intrusions by water and foreign particles.

The chart below gives a detailed breakdown for each individual IP Code numeric rating. The solid particle protection is always the first number and the moisture protection is always the second. To illustrate, a product rated IP57 would be dust resistant and waterproof up to 1 meter. A product rated IP68 is completely dustproof and waterproof.

IP Code Basics

Consumers on the hunt for waterproof or dust proof electronics will want to familiarize themselves with the IP Code. An IP ranking provides much-needed clarity in a market saturated with meaningless jargon and misleading advertising. While an IP ranking is not a guarantor of a product’s overall quality, it adds transparency by assessing what level of protection a product offers. A variety of consumer products, ranging from earphones to tablets, now display an IP ranking to advertise durability. Those who are familiar with the IP code have a powerful tool with which to make informed purchases of ruggedized electronics.

IP stands for International Protection Marking, or Ingress Protection. It is an international standard used to define the levels of sealing effectiveness of electrical enclosures against intrusions by substances like dirt, water and tools. In other words, it tells you what a product’s casing will keep out.

An IP classification is determined by the International Electrotechnical Commission (IEC), a non-profit, non-governmental international standards organization formed in 1906 and headquartered in Switzerland. Composed of a coalition of electrical engineers, academics and industry experts, the IEC is the world’s leading organization dedicated to “electrotechnology” standards, a broad catchall term for electronic technology. They establish world-wide quality standards for electrotechnologies. Currently, 82 countries participate in their program.

An IP code rates the degree of protection a product has against dust, accidental contact and water. The code is displayed as IP followed by two numbers, such as IP67. If either numeral is represented by an “X,” it means the product has not been tested in that category. It does not equate to a ranking of 0, but it does not guarantee any protection.

Solid Particle Protection

The first number in the IP rating signifies a product’s level of protection against access to hazardous parts and ingress (access or entrance) of solid foreign objects. Solid protection is ranked on a scale of 0 to 6. A ranking of “0” means the product has no protection against solid objects, nor way to prevent them from entering.

Rankings 1-4 represent how resistant an object is to entry by foreign tools, ranging from fingers to fine tools. This is an important safety ranking that assesses protection against accidental contact with charged electricity. An IP3X is the minimum ranking you would want if you have children or pets around, and an IP4X protects against foreign contact for grain-sized and larger objects.

A rating of a IP5X or IP6X assesses a product’s protection against hazardous dust or other fine particles like sand. These are the two most common Single Particle Protection rankings, and they tell you how well a product keeps dust out of electronic components.

IP5X means a product is protected against dust. Dust entry is not entirely prevented, but significant protection of dust assures the product can operate in sandy conditions. A ranking of 5 is sufficient for most consumer-grade uses.

A rating of IP6X means the product is completely dust tight and there is no ingress of dust. Contractors and those traveling to extremely dirty or dusty locations prefer products with an IP6X rating.

Liquid Ingress Protection

The second digit in an IP code indicates moisture protection. It can range from 0 (no protection) to 8 (completely waterproof in depths over 1m).

Many products advertised as waterproof are not intended to be submerged in water for any prolonged period of time. A ranking of 1-4 means that a product will operate if exposed to water (from splashing or dripping), but will not work under water. This is common for shower radios, outdoor speakers and kitchen appliances.

IPX7 and IPX8 indicate a product will operate while fully submersed in water for an extended period of time. These electronics are rated for depths of less than and greater than 1 meter, respectively. The manufacturer should specify exactly what distance this safety is assured to, so it is important to double check before taking your electronic underwater.

An IPX5 and IPX6 mean that the product can resist jets of pressurized water. It is important to note that a product rated to be fully submersed in water cannot necessarily survive pressurized water jet.

The post The IP Code: A Guide To Waterproof and Dustproof Ratings appeared first on Reactual.

The speakers that produce the lowest bass are tactile transducers — they typically produce frequencies in the 0.5 – 20 Hz range. Tactile sound is not perceived through the ears — it perceived through the body. Most subwoofers are incapable of producing audio in this range.

A good tactile transducer to start with is $150, entry-level Clark Synthesis Silver Edition (TST239) — it provides ample sub-frequency bass for the home user.

The Details

Tactile sound is the sensation of sound transmitted directly to the human body by contact, rather than by sound waves through the ears (tympanic sensation).

More specifically, it is sound perceived through bone conduction, through muscles and deep tissue, and via skin sensation. We perceive the vibrations through our haptic senses which include both kinesthetic (muscle) and touch (cutaneous) senses. We feel both inaudible (infrasonic frequencies) and audible frequencies. Thus, tactile sound is not just brute rumbles and shock waves.

Tactile sound can be perceived in high fidelity up to the mid-range frequencies. According to NASA research we perceive 0 to 1 kHz through the sense of touch, 0 to 3 kHz through kinesthesia (the sense of the relative position of neighboring parts of the body), and 0.20 kHz to 20 kHz through our ears. Note there’s an overlap — we can hear the range of 0.20 kHz to 3 kHz both with our ears and through other parts of our body. Also, some hearing-impaired individual can hear sounds up to 5 kHz through their skin.

Tactile sound is a sensation that many seek out. People often buy expensive subwoofers to achieve deep bass effects. In this pursuit, subwoofers are often pushed past recommend levels, resulting in damaged equipment, muddied sound fields, and disturbed neighbors. Typically, subwoofers not produce tactile sound very well. They are designed to transmit low frequency sound through the air, and they don’t usually produce bass below 25 – 30Hz. Correctly installed and enclosed subwoofers can producer lower and louder deep bass, but they will not produce the same level of tactile vibrations.

So what kind of device produces tactile sound? Tactile transducers, or electro-mechanical devices that are built specifically to vibrate objects. They are very similar to a loudspeaker woofer driver minus the cone.

There are two basic flavors of transducer: inertial shakers and linear actuators. Let’s take a look at the differences between the two:

Inertial Shakers

Inertial Shakers operate by shaking a mass in an enclosed housing. The resulting vibrations are transferred to an attached object, like the wooden crossbeam of a couch, for example. Usually, shakers are bolted directed to an object.

Companies that make Inertial Shakers include: Clark Synthesis, Aura Sound, Earthquake Audio, Buttkicker and Sonic Immersion Technologies. These devices vary widely in price — some produce a simple shaking effect, some produce high-fidelity sounds that compliment to a stereo system or home theater (such as those offered by Clark Synthesis, my personal favorites).

A good tactile transducer to start with is $150, entry-level Clark Synthesis Silver Edition (TST239). It will produce solid definition to drum hits, or shake your fillings loose if you so desire. The transducer can be installed in less than an hour. It took me about 45 minutes to bolt it to the bottom of my couch, using the parts provided with the transducer. In my test installation, I removed the fabric from the button of a couch, and bolted the transducer to a crossbeam underneath. Once installed, the entire couch functions as a bass speaker.

But wait, we need to power the tactile transducer! Clark Synthesis sells a $350 customized tactile amplifier to do this, but you can actually use any amplifier that outputs at least 100 watts (check the Clark Synthesis documentation for more info). Well, Cambridge Audio makes good amplifiers, but their entry-level models start at $330. We can instead use an AudioSource amplifier. This is a 2-channel 100-watt (50 watts x 2) power amplifier, which can be purchased for under $100. This amplifier is well-reviewed —  111 reviewers on Amazon gave it an average of 4 out of 5 stars. You attach your amplifier to the tactile transducer using standard speaker cables. You then connect the amplifier to the Sub Out connector on your receiver.

Linear Actuators

Linear Actuators are transducers that push against a hard surface. They apply a force directly to an object, in contrast to Inertial Shakers which vibrate themselves, and then transmit that vibration into another object. Commercially available Linear Actuators usually replace the feet of a chair. They operate by pushing against the floor, and directly lifting and dropping a chair. They tend to be more expensive that Inertial Shakers, and they can be only installed under chairs — they can’t be installed under a floor or in a swimming pool like the shakers above.

Companies that offer Linear Actuator include: Crowson Technology and d-Box Technologies.

See also: The Tactile Transducer FAQ

The post The Speakers With The Deepest Bass: Tactile Transducers appeared first on Reactual.