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If you have not read my review of headphones Koss UR50 , where I talked about the history of formation of the company – I recommend to read it first half, to understand the historical context and the role played in the company Koss personal audio. While there was virtually no role models, no major Chinese factories, offering hundreds of OEM models that can be taken and by gluing own logo, sell. Not without experiment with design: there are models of different colors, with a headset, and in honor of the 25th anniversary of the release of the model in 2009, the company released a limited edition of Koss Porta Pro Anniversary Edition. Normal option Porta Pro is sold in blister of transparent plastic, it does not look so stylish, but allows solidly to save when buying. Located at the ends of the arc black plastic cup holders headphones, their characteristic shape became the hallmark of the model. Symmetrical Y-cable – one of the biggest weaknesses Porta Pro, I think, would agree with all the owners of these headphones. For comfort landing Porta Pro is also unlikely to cause any complaints: they are light, almost weightless, moving cups provide a comfortable fit.
As I wrote above – open headphones, they sound warm, prone to dark, a little dismissive.
The fact that the surface of the radiator grille is a very narrow slots and foam ear pads, they jammed the upper part and the mids, leaving many resounding bass. Headphones for fashion should be dismantled, instructions with pictures are traditionally available at iFixit.
As you have seen, the main purpose of fashion – to remove all possible obstacles as possible between the radiator and your ear. Do you have a chance to see for themselves the veracity of this review, as the company Koss gave us the opportunity to give someone from readers headphones Sporta Pro (and almost everything written about Porta Pro applies to them), so we do a simple drawing. Noise-cancelling headphones work to isolate and eliminate unwanted outside noises while preserving the original audio signal.
These type of headphones come in all shapes and sizes, from big over ear cans to tiny earbuds, below you’ll find the 5 best noise-cancelling headphones reviewed. The PSB M4U 2 headphones are tuned to perfection for every kind of music genre delivering incredible bass, midrange, and treble response. The headphones feature an integrated Tri-Mode archetype and offers three listening modes: active, passive, and active noise-canceling. The Harman Kardon noise-cancelling headphones have a built-in rechargeable battery to power the noise cancellation which lasts for up to 40 hours and can be recharged through a USB cable. Performance wise these headphones do not sound at all like a noise-cancelling model, and I mean this as a compliment. As with all Bose noise-cancelling headphones, you have to activate the noise cancelation in order to here the music and once the batteries die so does the music.
The sound detail these headphones offer is pretty impressive, with a tighter and punchier bass and a clear, smooth mid-range.
The highly effective noise cancelling circuitry features microphones inside and outside each earcup to sense the sounds around you and reduce the noise. The MDR-NC500D headphones incorporates Sony’s patented AI noise-cancelling system, giving them the ability to analyze and reduce all the buzzing by 99 percent at 160Hz. As you have noticed these headphones are digital noise cancelling which means that the headphones use a digital equalizer combined with a software engine in order to cancel ambient noise and reduce stress on your ears.


The 40mm dynamic balance drivers incorporated in the Polk Audio ULTRA FOCUS 8000 headphones feature Polk’s Optimized Active Tuning which generates up to 15dB of noise cancellation. These headphones come with a decent number of useful adapters for airplane, mobile, stereo and Skype.
Not because bad Koss Porta Pro headphones, on the contrary, they are very good in its price category. Series of poor decisions taken by hired managers, nearly brought the company to bankruptcy.
Not surprisingly, the Porta Pro turned in almost all innovative, they are often compared with the Kalashnikov because Porta Pro can observe the same simplicity and efficiency.
The outer box of the usual cardboard black with silver lettering conceals another – from thick cardboard.
The headband is made of two metal arches to move relative to each other, this simple mechanism makes it easy to adjust the size, achieving a comfortable fit. The design allows you to fold holders inside for transportation, while the arc itself headphone can be fixed by using a hook and loop on the opposite ends (another example of elaborate ideas).
Ear pads are made of foam, they are placed on the cup, covering it, and additionally held small pins on the outer side of the cup. Listen to them on the street, you can, but that’s already in the truck will stop noise, and there is a risk to quarrel with neighbors, unhappy noise. Bass is good considering the price of headphones, but when compared to the more expensive models – in sufficient quantities, it sometimes lacks clarity and punch. If we take into consideration the price tag, Koss Porta Pro sound more than good, and almost certainly beat all competitors in a similar price range.
They are designed for a simple latch, so you need to disconnect the stick your fingers under the cup and pull it from the holder. As a result of greatly improved sound upper middle and high frequency range, bass becomes boomy and not so blurred. They are excellent play from any source, even though after a fashion – they are quite good players deserve the same level of X3.
If you are looking exactly overhead headphones and are not burdened with the extra money – then Porta Pro will be good choice for you.
This way you can listen to music, movies, audiobooks at low level volumes even when you’re in a noisy environment, like an airplane for instance. The difference between the PSBs and other noise cancelling headphones is the use of a low noise linear amplifier which isolates outside noise instead of the standard class D amp. The noise cancelation system on the M4U 2s uses 4 noise-canceling microphones, two on each earcup, to provide more accurate processing.
The headphones will still work even when the battery is finished when connected by the supplied bypass cable to a playback device. For a noise canceling model the Harman Kardons sound fairly natural and accurate with a pleasant but not overreaching bass. Fortunately the QuietComfort 15s have an outstanding battery life, up to 35 hours of listening. Proprietary ear cushion technology blocks some of the noise before it even reaches your ears.


Once it’s registered all atmospheric rattle, the MDR-NC500D automatically adjusts sound by enabling one of its airplane, bus or office NC modes.
MDR-NC500D delivers clear and sparkly high end details, right mids aswell as a present but not overpowering bass response. It also allows the headphones to react in-kind to various environments, such as an airplane, a train, or an office, which all generate different types of noise. The end result is distortion free output when playing all media formats, delivering a refined sound stage that produces clean midrange and deep bass.
A very cool feature is the Push-To-Hear Ambient Control which mutes the audio and amplifies outside sounds so you can hear without removing the headphones. This forced himself John C Koss back and stand at the head of the company, saving it from collapse, which seemed imminent.
Except the headphones, you get a leather pouch to carry, an adapter for 6.3 mm and a commemorative coin, commemorating the day.
In the normal version of the blue cup, in the jubilee – black, I personally like this version more. In conventional models of cable is also the easiest, rubber insulation, while Anniversary Edition – a cloth that gives it a little strength. To adjust the clamping force has two knobs on the outside holders, although the sound best when headphones snug. Mid normally worked, but it drowns out the bass a bit, at the expense of sound on some of the tracks seem a little buzzing.
You can make it rough, using stationery knife, or find a suitable diameter pipe and imprisoning her, cut a hole with it. I also want to note that the smaller the output impedance of the player, the better your Porta Pro will be controlled bass. We collect interesting news from the world of technology, and lay you in an accessible form. So if you want high quality noise canceling without having to sacrifice sound reproduction quality the PSB M4U 2 is probably what you were looking for. But after some thought, I decided that I still have something to talk about them, so read, and I hope you learn something interesting about the legendary model. In those years, Sony with its Walkman player making a revolution, making audio truly portable. In the normal version of these silver plate in the Jubilee and color versions – black. Koss also tried to release its own player, but the company was waiting for a failure due to delays in the start of sales.



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