Koss pro 4aa ear cushions. They fit great! Koss Porta Pro Limited Edition On-Ear Headphones, in-Line Microphone, Volume Control and Touch Remote Control, Retro Style, Includes Hard Carry Case, Wired with 3. Thick Foam Ear Pads Cushion For Koss Pro4AA Headphone. (I can get both channels if I jiggle the cord). Enhanced Comfort: Designed with care, these ear pads offer unparalleled comfort that makes wearing your headphones for long hours easy and convenient. The earpads are rubber like the original but filled with foam rather than fluid. net Tracking. Learn more about its specifications, pros and cons, and customer reviews. 3 out of 5 stars 1,181 ratings Sep 28, 2021 · The Pro4AA bass response does not change going from a Schiit Magni 3+ to a ~150 ohm output vintage stereo amp I have. The low end is fairly flat until rolling off at around 60-80 Hz. 5 out of 5 stars 1,776 Memory Foam Cushion Pads For Koss PRO4AAA PRO 4AAA TITANIUM Headphone Earpads. This is a review and detailed measurements of the KOSS PRO 4AA headphone. When auditioning headphones, take along a wide variety of program material. Also, the pads are not thick enough so my ear ends up being pressed against the driver in a very uncomfortable way. 3. The Original American Stereophone Company. Material: Soft leather and foam is used for the padding. Koss PRO4AA Full Size Professional Studio Accs Stereophones High-fidelity Perf. If they sound anything like Koss's precariously constructed open air Pro 4 AAAs from the 1980's I'll pass,lol. I was able to find the correct D-shaped ear cups from Koss, even though they're not listed on their site, I had to call them. Koss now offers the PRO-4A (also from the 70's) as the PRO-4AA - and the headband cushion and ear cushions look to be similar to the Phase/2. Sep 14, 2018 · Sep 15, 2018. 5mm plug for dj music computer. However, the pads are not a great match, the inner diameter of the Pro 4AAT pads covers some of the driver affecting the sound. +C $47. Koss Portable Replacement Cushions,Black. #3. Mar 18, 2024 · I have a set of Grado GS1000s. I'd have better luck trying to get toothpaste back into its tube! I'd be grateful for any tips. Ships from and sold by KRQ. So glad that Koss still supports the porta pro ! Good, easy transaction, easy to install. Looking to get them fixed a bit, but I have another question though. and have a decent open sound. Play a classical music station through them at a low to moderate listening level for about 80 hours and they become the sweetest sounding phones you have ever heard. My first-ever "serious" headphones were the Koss-built-for-Radio Shack Pro4/AA clones, they had the same fluid-filled ear pads, drivers as the Pro4/AA's, but were branded Radio Shack and housed in the Koss Phase 2 shells, having individual rotary volume controls. Does anyone know a source for Apr 29, 2009 · But, the headphones are in electrically good working/sounding order. They'll mostly be used for monitoring by someone I'm recording. Don't know about the ESP. Add to Cart. The kind lady told me that the cups for any and all years of this model could be replaced by Koss for $6, including return shipping. KOSS Pro 4AA Headphones Original. Jan 31, 2005 · 500+ Head-Fier. I bought these in 1978 and sent them back to Koss in 2004 to get a new cord, headband, and ear cushions,and i think i may have had a problem with one of the speakers. The KOSS PRO 4AAs were standard "cans", years ahead of Sony, for on-air radio personalities, Sports, News, and Rock DJs! KOSS of America has brought back their Pro4AA model stereophones. I called Koss to see what replacement parts they have for them. ca. 88 plus . I soldered the new wires together and taped them. He bought it used for $10 but then sent it to KOSS and they sent him a new one. Oct 7, 2011 · I got a pair of old Koss Pro/4aa phones at a garage sale, and I'm getting them back up to scratch. $9. Jan 4, 2011 Jul 14, 2013 · Awhile back, you could send in your Koss PRO-4AA headphones (under the lifetime warranty) and for $9 they would change the earpads and mail them back. 5mm Plug, Black and Gold 4. from United Kingdom. Over time the liquid dries out, and the cushions cannot be comfortable or properly seal against your ear. Sensitivity: 95dB SPL/1mW. Koss Pro 4a restoration and maybe modify PRO4AAT Ear Cushion Cushions. The original ones were liquid filled, but the new ones are just air or foam filled. TaiZiChangQin Ear Pads Ear Cushions Replacement Compatible with Koss Pro-4AA Pro4AA Pro 4AA Headphone (Protein Leather Earpads) 5. These are genuine Focal pads since no aftermarket solutions from Dekoni May 14, 2003 · In 1970 Koss would set the standard for full-size professional headphones with the introduction of the Pro/4AA. You can buy the cushions th Vintage 1970s Koss Pro 4AAA Stereo Headphones All Original RARE. 1 Pair of Replacement Cushion For Headphone Left and Right. 31 [1] (2023) Website. I was recently able to get a pair of Koss Pro 4aa headphones used for $15. Includes two pairs of ear cushions and two pairs of temple pads. Includes two ear cushions and screen/foam assembly. Show More. Porta Pro® Ear Cushions. Apr 27, 2021 · A few idea how to make our vintage headphones useable again, I managed to replaced the 280 ohms old drivers with a 60 ohms 50 mm drivers bought out from ebay Number of employees. Dec 25, 2021 · Buy Pro-4AA Ear Pads TaiZiChangQin Earpads Ear Cushions Replacement Compatible with Koss Pro-4AA Pro4AA Pro 4AA Headphone Protein Leather Black: Earpads - Amazon. Mar 10, 2011 · I have a pair of PRO 4AA I bought new back in the 70's. Apr 24, 2024 · Package Included: 1. Koss KTXPRO1 On-Ear Headphones with Microphone Control, Silver. Headband Cushion Thick Luxury Ear Pad For Koss Porta Pro Pp Sp Storm Headphone Dec 22, 2009 · I have listened to quite a few different headphones over the years and have never found any that i felt sounded any better or was as comfortable as my old Koss Pro 4-aa's. Quantity. Brand New · Unbranded. $1098. What I need to replace is the ear cushions and the foam cushion in the headband. Hover to zoom. They were introduced in 1970 as the first dynamic headphones to deliver true full frequency and high fidelity performance with impressive noise isolating capabilities. Replacement Earpads Cushion Ear Pads for Koss Pro-4AA Pro4AA Pro 4AA Headphones. Power hungry. With its inception in 1970, the Pro4AA over-ear headphones were the first dynamic headphones to provide true full-frequency and high-fidelity performance with exceptional noise isolation capabilities. FREE delivery on $35 shipped by Amazon. They’re not that comfortable to begin with, but time makes them considerably worse as they lose their elasticity and become painful to wear for long periods (or even at all). Apr 26, 2024 · Subscriber. ) The ear and brain hear headphones differently from speakers, which changes the way you perceive ClearApply. 10 ft. Mar 8, 2008 · Koss Pro4AA headphones repair. Thank you. Foam Ear Pad Replacement Cushions, Headphone Earphone Headset Disposable Sponge Covers (50mm - 2") 5 Pairs. Actual Photo. Koss offers the following User Manuals to help you learn about the features, settings and pairing process for your headphones. Might get some new foam earpieces (if available), just for kicks. PRO4AA. C $73. Koss's lifetime warranty applies only to purchases after 1989. There is some sentimental value in these for me, so it's worth it to try to fix them. The Magni 3+ has so much power and do low an output output impedance I got these ear cushions to replace the OEM ones that came with my Koss Pro 4AA headphones. C $14. Couldn’t really listen to them because the ear cushions have completely disintegrated. 46. 15-1598), warranty card, and the receipt dated 12-30-78. VERY GOOD. Jan 16, 2011 · In this tutorial I'll be demonstrating how to replace the ear cushions on a pair of Koss headphones, specifically the Koss UR-20. Luxurious Ear Pad Foam Cushion For KOSS Porta Pro PP KSC35 KSC75 KSC55 Headphone. I was told no parts are available however they are still going to send me a free pair of ear cushions meant for 4aa headphones. C $15. R. Jan 4, 2011 · Koss Pro-4 AA earphones ( ear cushion removal) Hide sidebar Show sidebar Thread starter Angelo Heasley; Start date Jan 4, 2011; A. Replies 32 Views 10K. Feb 7, 2013. +$8. Featuring the all-new SLX40 element, tuned for reference, the Pro4S Studio Headphone delivers an incredibly accurate and unbiased sound, perfect for any studio or creative environment. 9 reviews. Standard International Shipping. 33. Parts Only. This ear cushion is made of high quality foam and high quality Vintage KOSS Pro-4AA Over The Ear Headphones Cushion . Color: Black-Leather,Softer Foam Pad. Recommendations. #1. These are 250 Ohm headphones with huge drivers by today's standards. 93 USD. C $273. which is double that of most other headphones. Price $65 (1976). This all new professional model stereophone from Koss will give you hours of fine listening pleasure in the same tradition as the Koss PRO/4AA, the world's largest selling high fidelity stereophone. williamfeinberg (68) 100%. She noted that for old models with the silver metallic ring around the cups, the installation is done within their I have re-issue (not original, they were replaced) Koss Pro 4AAs. Music lovers around the world recognize that dedication to accuracy in sound reproduction as: The Sound of Koss®. PRO3AA Ear Cushion. 49 tax! Oct 23, 2018 · The PRO/4 Triple A makes your listening easy. $59. 5 out of 5 stars 1,747 The ear cushions of the Pro 4/AA were liquid filled, to provide good seal and sound isolation. Apr 12, 2024 · Colr:BlackActul Photos100% Brand New & High QualityMaterial: Soft leather and Memory foam is used for the paddingPerfect Fit Your Headphone. Jun 1, 2021 · Compatible for Koss Pro-4AA Pro4AA Pro 4AA Headphones. 0% Financing and Free Shipping on thousands Overview: The Koss Pro/4AA noise-isolating, full-size headphones feature oversized elements and an exceptionally wide frequency response (10Hz-25k Hz). Holy customer service! I don't really need to restore Koss Porta Pro Limited Edition Black Gold On-Ear Headphones, in-Line Microphone, Volume Control and Touch Remote Control, Includes Hard Carrying Case, Wired with 3. WARNING: Cancer and Reproductive Harm - www. 3 4. Only 1. Oct 3, 2009 · Koss Pro/4AA ear-cushion removal? pmsummer; Feb 18, 2009; Headphones; 2. 25 shipping. You can't send them in. Discover the Koss Pro4AA, a premium closed-back headphone that delivers superb sound quality and comfort. They now charge $5 to just mail the pads to you. When I went to listen to them The Foam on the earcups had disintegrated and they sounded like crap. gov. Koss Pro4AA headphones set the standard for full size professional headphones. The PRO-4's sound was judged to be about midway in character between the new Sharpe HA-10 and the Jensen phones. Apr 9, 2003 · headband is flexible and easily adjustable. Sound & Recording Buying Guides! Buy the Koss PRO/4AA, PRO4AA at Full Compass Systems. May 1, 2017 · Koss Pro-4AA Studio Quality Headphones, Standard Packaging,Black,Full-Size Amazon's Choice . --- Green Country 7-15 Working Days Delivered --. Noise rejection is extremely high, but the PRO-4 is not quite as comfortable for long periods as the Sharpe HA-10 (because of a smaller ear cushion). I did, and it worked! Dec 31, 2022 · Leather Ear Pad Cushion For KOSS Pro3AA Pro4AA Pro 3AA 4AA TITANIUM Headphone. Loved those 424s back then. Feb 25, 2017 · They're not worth throwing out, and I love a project. Well that’s a lot of output impedance. The Koss Pro4AA headphones have a frequency of 10 Hz – 25 kHz and an impedance of 250 ohms. com FREE DELIVERY possible on eligible purchases Jun 9, 2020 · The Koss is handsome, well constructed, and apparently quite durable. The only problem with them is that they were missing a jack. The company introduced the first high fidelity stereophones. I have a Koss Pro4AA that has a bad contact where the cord enters the left earpiece. The extra wide, super smooth frequency response of 10Hz to 22,000Hz offers a full bandwidth dynamic Dec 27, 2021 · Power and frequency response 2. Sep 3, 2021 · Changing ear pads. Impedance: 250 ohms. Hadn’t heard them since probably 2000. dummy. $24. The next step for improving how the Koss headphones feel on the head is changing the ear pads. Koss PRO4AA Professional Headphones Pro 4AA Very Rare Vintage 1970 With Good Box. Support. This ear cushion is made of high quality foam and high quality leather , which makes your wearing cozy. 57. CableStraps x 1 Pcs. Feb 18, 2009 · Mar 23, 2009. 5mm Plug, Rhythm Beige 4. $7. Try to include recordings that use different miking techniques (pan-potting, Blumlein, ORTF, etc. 99. And the Koss Pro-4AA's do require a breakin period like most other highend components. I had another pair of broken koss headphones, so I figured that I would just splice that jack on. comOutside USA and Canada Email: customersupport-intl@koss. I recently took the covers off and examined into the wiring and found that the tape that I used had unraveled and the joints became exposed and were possibly shorting against the metal of the reproducer. Sent them for repair to Koss and a week Description. Apr 16, 2012 · Koss KPH40 Utility On-Ear Headphones, Detachable Interchangeable Cord System, Ultra Lightweight Design (Rhythm Beige) dummy Shure SRH440A Over-Ear Wired Headphones for Monitoring & Recording, Professional Studio Grade, Enhanced Frequency Response, Work with All Audio Devices, Adjustable & Collapsible Design - 2022 Version Jun 1, 2022 · Item description from the seller. Jun 9, 2020 · Koss PRO-4, PRO-4A and Pro/4 AAA Plus headphones Headphone Buying Tips. 99 $149. com, or check out our domestic and interna Jan 17, 2022 · 1. 17track. May 10, 2021 · When you add thicker pads,you are introducing a bass tunnel which is coloration! That being said, some of the music Zeos listens to,were probably mixed with Koss Pro 4AA’s!! Funny huh? One thing for sure, It is critical that you adjust your ear to the sweet spots inside the pads ,since there is no margin for error! Mar 18, 2024 · Mar 18, 2024. These professional-grade headphones meet the rigorous If you're looking for where to find these, look no further! You can purchase these directly from us at dekoniaudio. KSC35 Replacement Earpads Protein Leather Memory Foam Ear Pads Cushion Cover Compatible with Koss Porta Pro PP, KSC75, KSC55, KSC50, KSC-10, KTX PRO1, KTX8, PTX6 Headphones (Black) 1. This is a nice earpads , protect your earphones well. Nice and comfy. In researching it, I found a review (of a different revision) dating back to 1963 yet it is still on sale on Amazon for US $80! The Pro4S Studio Headphone is specifically crafted for professionals who use headphones every day to create the world's greatest music. 49 $ 14 . koss . Vintage Vtg KOSS Pro-4AA Over The Ear Headphones Cushion . Only 1 left in stock - order soon. 84. Koss UR10 Stereo Headphone Dual ear Stereophone 3. 50 MM Replacement Ear Pads for Koss,AKG,Sennheiser Headphones (Diameter 50mm) dummy. However, these headphones are lacking in just about everything that is high-fidelity. Frequency response 10-20,000 Hz, impedance 4-16 ohms. Working. In general, the bass is incredibly lacking. com: Portable Audio Headphone, Replacement Earpads Cushions Pillow Pads for Koss Pro-4AA Pro4AA Pro 4AA Headset : Electronics You will sit quietly and listen. The steel and integrated padded headband lets you use the headphones for extended periods. Vintage Koss Pro 4AAA's will reproduce lower bass with clean, unbloated authority, however 4AA's are weak in that department. New York, NY, United States. I just spoke to Koss today about replacing the ear cups on my ~1978 Pro4/AA's. motoe771 (11) 100% positive; Seller's other items Seller's other items; Contact seller; US $25. This Item. Feb 28, 2021 · I came across my original KOSS PRO/4AA booklet (Assembly No. If you remove the black ear pads I recall there should be several screws to remove the driver section. The easy (and ultimately right) solution for Koss headphones is the replacement foam pads made by Yaxi. There are some differences from the original. Aug 11, 2020 · Compatible For Koss Pro-4AA Pro4AA Pro 4AA Headphones. I must say they are new set of headphones. Thanks to their Unlimited warranty. Durable and soft for comfortable listening. Porta Pro also have a better more durable design. The Koss Pro 4AA, originally made in 1970 was the first dynamic driver headphones recognized to reach the full frequency range, and considered HiFi at the time. frequency response consistency is very good. Description: Color : Black. com To Aug 27, 2010 · Hey! Just found a pair of the Koss Pro 4 AAA for a few bucks! They work but of course the original ear cushions are junk and missing the head strap/cushion. Dec 6, 2004 · the Koss headset and took off the old "liquid filled" pads and put on the new foam filled pads. If you're lucky, the rarer 4AAA's can be had on eBay for less than $40. Specifications. Leather Version. Rhythm Beige The iconic Koss Rhythm Beige colorway can be found on many legendary Koss Headphones like Porta Pro Limited Edition, KPH30i and KPH40 Utility - but it was first introduced in 1970 with the release of the Pro/4AA. 0 out of 5 stars 1 $14. Koss Porta Pro headphones. Mar 19, 2021 · I just found a pair of these a relative gave me. C $4. 88 from Lafayette Radio (list price $60): Frequency response: 10-20,000 Hz (no +/- info listed). Shipping weight 2 lbs. Very easy to switch out too. Knows Picking (213) 100% positive; Seller's other items Seller's other items; Contact seller; US $39. Ever since I invented the world's first SP/3 Stereophone back in 1958, Koss Stereophones have been bringing back the excitement of a live performance. PRO4AA Over Ear Headphones. from United States. It's easy to confuse the 4AAA and 4AA names, however there is a difference in looks and sound. Feb 26, 2022 · supply chain for KOSS Pro4aa headphones has created a lack of parts, so here's a way repair your headphones very inexpensively PRO4AA Over Ear Headphones. Lightweight and comfortable design Above-average audio reproduction. Frequency Response: 10 Hz - 25kHz. Jun 28, 2020 · They have the same shape as Koss Pro-4AA drivers and I'm currently using those pads for the ESP-9s. Jun 11, 2020 · These Koss Pro/4AAA were stored along with everything. Check out our helpful. They start out soft, and then the plastic hardens to an Sep 16, 2021 · This item: YDYBZB Ear Pads Cushion Earpads Foam Replacement Compatible with Koss Pro-4AA Pro4AA Pro 4AA Headphones. Nov 8, 2023 · Soft Leather Ear Pad Foam Cushion EarMuff For Koss UR20 UR 20 Headphone. +76. Sold out. $5. My Fiio A3 does "ok" with them, but they're still kind of mediocre even on most average home stereos. 49 PRO3AA Ear Cushion Cushions. Made from high quality leather and foam, these replacement are extremely easy to install. I'm pretty sure that it is outside the warranty. In 1970 Pro/4AA set the standard for full-size professional headphones delivering true full frequency performance. Reticuli. May 14, 2007 · Compare with similar items. Read honest and unbiased product reviews from our users. Problem is, Over time the ear cushions have been extraordinarily rock hard and they actually hurt to wear. Today at 1:03 PM. 1 offer from $79. Also one of the plastic connections from the headband to the earphones are broken. Koss Pro/4AA headphones. [2] Feb 28, 2024 · Leather Ear Pad Cushion For KOSS Pro3AA Pro4AA Pro 3AA 4AA TITANIUM Headphone. 2. Includes one pair of ear cushions. 44. While in stock form, the Koss headphones are quite comfortable, their thin foam pads are a bit scratchy and not quite thick enough. 100% Brand New & High Quality. 99 In 1970 Pro/4AA set the standard for full-size professional headphones delivering true full frequency performance. retroxpressthrift (5,141) 100%. pre-owned KOSS PRO 4AA headphones over ear quality professional audio headphone. in Over-Ear Headphones. Sponsored. Earpads Replacement Cushion Ear Pads for Koss Pro-4AA Pro4AA Pro 4AA Headphones. D'oh! I thought that they did, as they actually still sell an updated version of those phones. Feb 22, 2018 · Koss Porta Pro Wireless Bluetooth On-Ear Headphones, in-Line Microphone, Volume Control and Touch Remote, Adjustable Headband with Multi-Pivoting Ear Plates, Black Visit the Koss Store 4. You're lucky, the pads for my Focals are insanely expensive starting at $225 for the original Elear all the way up to $400 for Utopia pads. Complete Replacement Solution: You get two premium foam ear pads, specially designed and exclusively compatible with Koss Porta Pro PP KSC35 KSC75 KSC55 Headphones. Pre-Owned. Vintage Koss Pro 4AAA Plus Digital Ready Stereo Headphones Tested Works Read. 10 watching. The Pro 4AAs are the best headphone I've ever owned,I think most discruntled owners are using them on I Pads or digital. I recall the sound of the Pro/4AA as sounding very smooth, if a bit laid back. #21. Speedy shipping with multiple nationwide warehouses. I got a blurb from Koss today, the stock pads are going for $ 5. They have oval around-the-ear pads, but they are somewhat low profile and shallow. Will try our best to resolve your problem until you are satisfied. In Stock. or Best Offer. 73. exceptionally well-matched in frequency. 30-Day Return Policy. $160. com. Durable and soft, high elasticity. The OEM Koss ear cushions are made of rubber that hardens after about a year. Koss World Headquarters On June 25, 1971 John C. For additional questions please contact Koss Customer Support:Phone: 1-800-USA-KOSS (1-800-872-5677)Email: customersupport@koss. P65Warnings. C $18. Regarding comments about lack of bass, there's a *big* caveat. Consequently, the plastic mesh inside the pad that covers the earphone receiver can press against one's ear, which, in turn, can become uncomfortable over extended listening sessions. May 12, 2012 · Got a pair of pads from Koss, but it's a really tight fit; kind of like the headphone is a size 10 and the pads are size 8. These arrived today, and like my original pair back 53 years ago, these still weigh a tonbuilt like a tank. Headband Cushion Thick Luxury Ear Pad For Koss Porta Pro Pp Sp Storm Headphone Sep 30, 2003 · From a catalog: KOSS MODEL PRO-4AA Improved professional stereo headset, engineered to meet the most rigid requirements. Includes three pairs of Porta Pro® replacement ear cushions and three pairs of temple pads. But the other night I pulled out of storage (the basement) my old Sennheiser HD424s from 1979. 00 a pair. Free shipping. C $16. Good afternoon everyone! I appear to have a pair of vintage Koss Pro4AAs on the way (eBay seller accepted my lowball offer as they were untested) Difficulty: it appears that Koss does not have any replacement ear pads. My questions are: 1) can anyone confirm that, yes, the Find helpful customer reviews and review ratings for TaiZiChangQin Pro-4AA Ear Pads Ear Cushions Replacement Compatible with Koss Pro4AA Pro-4AA Pro 4AA Headphone Protein Leather Earpads at Amazon. $79. Rule 1? I love my PRO4AA's, I bought them maybe 6 years ago and the audio quality is amazing. 0. 45 shipping estimate. About a year ago I purchased new ear pads directly from Koss. 1 Pair of Ear Pads Cushions Earpads Replacement Foam for KOSS PRO4AA Headphones. It is on kind loan from a member. These phones would fall apart with a sneeze. Shouldn't be too much work to locate Dec 23, 2011 · The driver design looks similar to the Pro 4AAAT's . My set had been in storage for quite a while. 00. Add to cart. Angelo Heasley Audiophyte. coiled cord. Jun 12, 2021 · Nice change from the cheapness of most aftermarket pads. I got replacement ear cushions from Koss, but the foam headband at the top is starting to flake. Aug 11, 2020 · Amazon. They weigh 22 oz. PRO4AAT Ear Cushion. Porta Pro® Ear Cushions Cushions. mid-range performance is very good. 10 reviews. Package Included: 1 Pair Earpads ( Headphone not included ). I purchased them new from a place called Audio Warehouse and they cost all of $8. Soft Fluid-filled ear cushions seal out ambient noise, foam headband pad. Top Rated Seller Top Rated Seller. Brand New. $99. Koss UR20 Over-Ear . 08 shipping. Koss unveiled the new Koss World Headquarters in Milwaukee, Wisconsin. Now in 2021, they still make them (or atleast a version of them), to celebrate the iconic nature of these headphones. nitrous said: This info is from the insert which came with my set of Koss Pro-4AA headphones purchased in the spring of 1973 for $31. $114. Koss Pro4AA headphones deliver high-quality audio in a classic vintage design. Cord: Coiled, Single Entry, 8ft. $5 is all they cost, couldn't believe they still make them and how inexpensive Find helpful customer reviews and review ratings for TaiZiChangQin Pro4AA Ear Pads Cushions Replacement Earpads Compatible with Koss Pro-4AA Pro4AA Pro 4AA Headphone Protein Leather Black at Amazon. 58. Sep 29, 2021. I got my Koss Pro 4AA headphones back from Koss repair today. The generous ear pads and closed design shut out external noise so all you hear is the music. Compatible with KOSS PRO4AA Headphones Headset. I've actually replaced them once before and it simply happened again a few months later. Opens in a new window or tab. No wonder the receiver messed up the porta pro feq response. Koss Corporation is a company in Milwaukee, Wisconsin, US that manufactures headphones. lk nr ra vp ac jk gj wy rx rl