Koss Pro4AAT Titanium Pro Headphones | 
 enlarge | Artist: Joan & the Blackhearts Jett
Brand: Koss
Category: CE
Department: Headphones
List Price: $99.99
Buy New: $62.00
You Save: $37.99 (38%)
New (26) from $62.00
Rating:  75 reviews
Color: black
Media: Electronics
Autographed: No
Memorabilia: No
Discs: 1
Batteries Included: No
Shipping Weight (lbs): 1.3
Dimensions (in): 9.5 x 8.5 x 4.3
Legal Disclaimer: Warranty does not cover misuse of product.
Warranty: Limited lifetime warranty
MPN: 145567
Model: 145567
UPC: 689076735490
EAN: 0021299145562
ASIN: B00008Z1QI
Availability: Usually ships in 1-2 business days
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| Features:
| • | Frequency response 10-25,000 Hz | | • | Titanium Coated High Polymer Titanium Diaphragm for Accurate Sound Reproduction | | • | Oxygen Free Copper Voice Coils for Signal Clarity | | • | Closed Ear Cushions for Maximum Bass and Isolation | | • | Stereophones, with 3.5mm plug, and 6.3mm adaptor |
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| Editorial Reviews:
Amazon.com Product Description
Koss Pro4AAT Titanium Pro Headphones are rugged, closed-ear headphones built tough enough for broadcast use but at a price even the smallest studios can afford. Built for extreme durability and with a closed ear design for maximum bass and isolation, these headphones have a wide frequency response of 10 Hz-25 kHz and feature titanium-coated high polymer diaphragms for crisp, accurate sound and oxygen-free copper voice coils for signal clarity.
Product Description
MODEL- PRO4AAT VENDOR- KOSS
FEATURES- Pro4aa Titanium Headphones
Home headphone is a headphone that is primarily used in the home,
with home electronics. Generally speaking, home headphones are
somewhat larger and more isolating. Home headphones with cords
tend to have a longer cord.
* Titanium coated high polymer diaphragm for accurate sound reproduction.
* Closed ear cushions for maximum bass and isolation.
* Built for maximum durability for studio and broadcast use.
* Oxygen-free copper voice coils for signal clarity.
* Coiled, single entry 8 foot cord
* 3.5 mm plug and 6.3 mm adapter
-- SPECIFICATIONs --------------------------------------
FREQUENCY RESPONSE- 10 25,000 Hz
IMPEDANCE - 250 ohms
SENSITIVITY - 95 dB SPL/1mW
DISTORTION - < 0.1%
CORD - 8 foot straight cord with 3.5mm plug
WEIGHT - 21 oz.
koss.com
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| Customer Reviews:
Showing reviews 1-5 of 75
 Sound great, block out noise, heavy August 25, 2010
Jason Heiss
1 out of 1 found this review helpful
Amazon tells me I bought my pair of these a little over 4 years ago. I use them at work to listen to music and block out noise. Although they're not fancy noise canceling cans, by virtue of their heft and good seal they are very effective at blocking ambient noise. For me they sound great, although I'm far from an audiophile so take that for what it's worth. Surprisingly given the tight seal and all that I don't find them uncomfortable for extended listening. They have lots of room internally so they don't squish your ears. They don't fold up very well so they're hard to transport, best used in a single location.
 Muddy, no transparency, cheap Sennheiser PX-30's beat the heck out of these in sound quality.... August 8, 2010
RickB
I've owned Koss headphones for 40 years, I even had some of their Quadraphonic ones back in the days of Quad and their great HV-1's which I sorely miss after some lousy jerk stole them...
The Koss Pro4AAT's I have were a factory replacement for a set of Pro4X/Plus that were replaced under Koss' lifetime warranty program...maybe I should be grateful, but I really have not found these 'phones to work well for high fidelity listening.
To assuage some assumptions about the operating conditions and quality of gear which has been mated to these headphones, let me assure you that I tried them with several different dedicated headphone amplifiers, both tube and solid state, and directly from the headphone jacks of tape decks, CD and SACD players, all in an attempt to get them to deliver their best sound. Nothing I did ever raised the Pro4AAT's sound quality to even the level of a cheap set of Sennheiser PX-30's or 40's, much less something on the level of Grado SR-80's, which consistently outperform the Pro4AAT's in bass, midrange, and treble.
I pretty much only have time to listen well recorded music, mostly classic rock, jazz and classical, never any MP3's, and have pretty decent analog and digital gear...such as a Sony SACD player, Teac reel to reel tape decks, an old, but very good sounding CD digital setup with a Philips CD-80, and a Home Theater PC feeding it's digital output to an Audio Alchemy DTI 2.0 and that feeding a DDE 1.2 HDCD DAC...my Linn Sondek has the Ittok LVII arm, cartridges range from Benz woodies to Ortofons, to, well, just too many to mention here...all these are fed through an Audible Illusions Modulus 3A preamp...the ASL headphone amp is fed from the tape loop output of the AI...current headphone amplifier is a tweaked Antique Sound Labs MG-Head OTL MkIII DT...main speakers are Martin Logan Aerius-i electrostats...cabling is Wireworld, Cardas, etc...power cables are Shunyata...I vary between tube and solid state amps powering the ML's...
To give a comparison to something else in the Koss line, I have a pair of the JR-170 wireless headphones. This set of 'phones have good quality bass, treble and midrange, roughly comparable to the Grado SR-60's and SR-80's, and allow me to hear the differences when I make small adjustments to the vertical tracking angle on my Linn Sondek, for instance....unfortunately, the Pro4AAT's are so obscuring of the signal coming from my headphone amp that only the very grossest of misadjustments are able to be heard. I hear many of the small treble effects, like "chiming" on guitar strings, to be just flat gone, and forget about hearing any texture in the music...these things are great homogenizers of what ever is fed them...kind of like MP3's at even the highest bit rates corrupt the sound in comparison to the original CD, DVD-A, or SACD sound quality...
I am older so clean and clear treble is a necessity for me, any distortion in this region reduces listening enjoyment and leads to fatigue...but, the PRO4AAT's don't even seem to reach that high and what treble that is present is greatly lacking in clarity and extension...which is a problem that I do not have with the aforementioned PX-30's or the JR-170's, much less the SR-80i's, SR-125i's, or SR-325i's from Grado that I have listened to extensively.
I even proved this to the 23 year old musician son of one of my best friends...we compared the PRO4AAT's to the Grado SR-80i's and he felt like the Koss were just broken in comparison...he was very impressed with what he heard from the Grados when connected up to my headphone amplifier with NOS European tubes from Mullard and Amperex...this is even though the Grado phones have to go through the output transformers rather than operating without them in the circuit as the Koss can...and yes, the suboptimal sound of the Koss do improve a bit when used without the transformers in line...
The bass, which should be good, is not. It is loose, bloated, and lacks pitch definition and detail. It lacks punch, and just generally sounds bad. Once again, the cheap, cheap, cheap Sennheisers I mentioned before actually outperform the Koss here...but, the cheap Senns aren't really that good of 'phones in the grand scheme of things, but work out well as gifts to younger folks wanting something better than their ubiquitous earbuds...
I've had these Koss phones for a couple of years now and did have had them spend many hours (well over 100) alternating between using burn-in disks and playing music, yet nothing I have done has been able to makes these phones sing....
But, there is one use for them I have found that is just great...and that is when I use them with my Ham Radio gear...it doesn't matter whether it's TenTec, Yaesu, Collins, or Drake, the Koss phones work well for Ham Radio usage...in this instance the lack of high frequency clarity and extension actually comes as a benefit with the kind of noises we have on the HF bands. Their comfort allows me to listen for long periods without feeling like they are going to fall off or that my head is in a vice...the closed back design keeps the noise in my head and not out in the house, and that makes SWMBO much happier!
And that is the only reason why I will keep them, not for their intended high fidelity use, but for their actual lack of fidelity and their effectiveness in my Ham Shack. But, only after I send this pair back to Koss and see about exchanging them for another pair that doesn't sound so lousy.
Should a replacement set of the PRO4AAT's end up sounding better I will edit this review to reflect that...should they not, then I will also report that.
Heard stuff I hadn't heard before! June 24, 2010
Cory J. Smith (Seattle, WA USA)
These headphones replaced a pair of Pro 3AA's which I really liked. I put them on, listened to a variety of CDs and was amazed to hear stuff I had never heard before (eg. the PAN settings on one song were totally amazing). They are heavy but I am glad I will have a great pair of headphones to record with.
Nice Pair of Headphones for the Price May 27, 2010
Jeff Tomkinson (North Carolina, USA)
1 out of 1 found this review helpful
First off, I would like to say that these are some of the best looking closed ear headphones anywhere near this price range. If you don't have the want or money to buy a $300 pair of headphones then these are for you! First off I shall list some of the pluses for this product then followed by the negatives.
Pros:
- Lets face it, these are some beautiful headphones! They use the right materials in all the right places!
- I like closed ear headphones which block out background noise and these do the job very well.
- The mid-range and treble sound levels are really nice on these.
- You can't scoff at the lifetime warranty! It's one of the best things Koss is known for!
- The coiled headphone cord is a big plus! It makes owning a set of cord headphones quite nice.
- Oh, did I mention how good looking these headphones are?
Cons:
- My biggest complaint with these headphones would be that the bass sound level is somewhat soft. If you love to listen to your music with a ton of bass, then these aren't the headphones for you.
- As with any closed ear headphones, they can get a little tight on your head after a while.
- Not really a con for myself, but everyone's head varies in size so a set of closed ear headphones won't be perfect for everyone.
Update Classic May 25, 2010
IQ (Chicago)
I bought these headphones after I purchase the PRO/4AA's, for a different sound system. These headphones are good in their own way. Not as durable as the Pro 4AA's or as natural sounding, but their sound and their distinct bass holds a certain flavor. Headphones do require some seasoning. I will report my findings in about 3 months from this posting. No surprises.
Showing reviews 1-5 of 75
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