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Load image into Gallery viewer, Koss Pro 4 Aa Studio Quality Headphones, Standard Packaging
Load image into Gallery viewer, Koss Pro 4 Aa Studio Quality Headphones, Standard Packaging
Load image into Gallery viewer, Koss Pro 4 Aa Studio Quality Headphones, Standard Packaging
  • Load image into Gallery viewer, Koss Pro 4 Aa Studio Quality Headphones, Standard Packaging
  • Load image into Gallery viewer, Koss Pro 4 Aa Studio Quality Headphones, Standard Packaging
  • Load image into Gallery viewer, Koss Pro 4 Aa Studio Quality Headphones, Standard Packaging
Vendor
Koss

Koss Pro 4 Aa Studio Quality Headphones, Standard Packaging

4.0
Regular price
€125,00
Sale price
€125,00
Regular price
€206,00
Sold out
Unit price
per 
Save 39% (€81,00)
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  • Tracked Shipping on All Orders
  • 14 Days Returns

Description

  • Connectivity Technology: Wired
  • Frequency Response - 10-20,000 Hz and Impedance - 16 ohms

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Customer Reviews

well-made, doesn't feel or sound great. These are clearly high-quality construction - but I am not a fan of their fit, or their sound. It's not clear and precise enough to be a monitor/reference set, and it's not quite tweaked towards the bassy end enough to be a set of every day listeners. But more to the point, they're bulky and uncomfortable. I really want a pair of cans I can have on my head for hours at a time, and these start to hurt my ears and temples after minutes.I like what they're trying to do, in terms of style and materials... but I am just not a fan of the sound or fit. Your mileage may vary, of course. 2I really want to give these 5 stars... I bought these based on the strength of the reviews of the classic 'phones, and I really wanted them to be as good as the legend. But over time, I learned that sometimes the past is the past.First, the good. These 'phones are durable. They sound decent but it took me a while to get a headphone amp that could handle their impedance. Once I did, I really got pretty good sound. The sound was flat, not too bright, not too lacking. That's key; you can't run these off cheap equipment and have them sound good. These also have a lifetime warranty. Bonus! And they really seal out the outside sounds and the music in so I don't bother anyone else.The bad: although flat in eq, the sound is just short of exciting. Sure, I am comparing these to my venerable AKG Playback 270s, and even my Koss DJ x00 Tony Bennett cans, but for some reason they just don't have the excitement.Also, I had to fix the solder on one side of the earcups. Disappointing how something so durable had such a flaw.Otherwise, these things are tanks and they are great for demanding physical situations. I think they are good for the office and other situations where you want real durable equipment and isolation. And if you dig on the classic gear, you could do a whole lot worse.That being said, although my Koss Tony Bennett Special Edition (TBSE) 'phones cost less, they seem to have more life to their sound. Yeah, the high end is a bit papery and the low end is a little less pronounced, but the TBSE overall is clearer, more detailed, and had better headroom. Sure, they don't seal the sound as well, but they are a more rewarding experience overall.And, of course, progress marches on. Newer headphones like my AKG have better soundstage and headroom, and have less resistance.All that being said, I will keep these in the stable as they have their place. But be forewarned; if you are gonna get these, you really need a powerful amp to get good sound. Hook them up to an iPhone and you are bound to be disappointed, but that's on you. 4It only took 50 years but finally got my Pro4AAs !!! These are like wearing a C-Clamp on your head, but so what?They're built like a tank and as heavy as one too !!!The thing is, there's a huge reason these are still around exactly as they were when I was a kid.They just plain rock and do what you bought them for, great sound from over the ear headphones!These were quite pricey 50 years ago. In comparison today they are an absolute steal!I have owned Koss headphones in the past, had some warranty work done by them, and their service is top notch!There's no reason these won't go another 50 years for my great grandkids to fight over! 5**YOU WILL NEED AN AMP TO USE THESE** **YOU WILL NEED AN AMP TO USE THESE**All the reviews complaining about low sound levels, flat sound or bland sound are possibly the types that are straight plugging these into their computers or phones or iPods. They literally do not supply enough power to drive these headphones, and as a result will not sound the way they should. Anyone buying these headphones and intending to use them with anything other than dedicated audio equipment will need to buy an amp from Fiio or the like. Today's Pro-4AAs also do not come with oil filled ear pads, they are now (rather thin and cheap) foam. While certainly uncomfortable, you no longer have to worry about puncturing the ear pads and having oil run down your neck or find that your headphones in storage have been ruined.There is a reason Koss still makes a model of headphones from 1970. These have been trusted by stations and recording studios the world over. If it was any more gaudy '70s kitsch it would have art-deco patterns all over it and wood grain trim, but they're built like brick houses. If they were any more uncomfortable it would crush your head like a grape, shred your ears and snap your neck, but they're sure as hell not moving from your skull. They require bulky amps or equipment to even hear sound properly out of, but these are the headphones that engineers and producers OK'd sessions and recordings with. No one sells microphones that use the set's microphone mounting knob without modification, but it's always there should you need it. The 8' cable is coiled, cumbersome and crappy, but Koss guarantees these headphones for life and will repair or replace the cable/set if you've got 9 bucks for shipping.I think it's easy to tell if you're the type that needs these headphones or not. These are by far the most ugly, uncomfortable headphones I've ever willingly paid for and I will never go outside with these on, but they make things sound the way they should. I still find new things in songs that older headphones or speakers would drown out with bass or just not produce at all. 4Love Koss Pro4AA to bits, yet, it Breaks my Heart. (Pictures: Without Ear Cushions) I got the Koss Pro4AA Headphones back in December 2017. So I've had them for 12+ months and only use them on the PC, mainly YouTube, Netflix, DvD Movies, and Games. It's true, YouTube can sound like crap but you will notice a difference when YouTubers use great sound equipment, etc. But I do recommend these for content creators, personally I am not a pro but still...I love this headphone, so far there is no plastic or metal flaws that will cause random failure (snap/break/bend) in the physical structural design.The only common flaw with these that can happen like any other headphone is poor wiring.For me, I deal with a wiring issue between both speakers where the audio can be cut off from the left ear and multiple connections for a full audio sound is missing, I fix this with a simple push/wiggle of the wire between the right ear cup and head band.It's a annoying thing that I've grown used to, I'd much rather replace ear cushions than deal with headphones that are more likely to snap in half.On the topic of ear cushions, I do recommend replacing the original with thick and deeper cushions, comfort and pressure and sound on these will have positive changes if you set it up right. Put some fiber-like-fabric between your ear and the speaker and if you notice the sound is too sharp and sound bleeding under the ear cushion the extra layer could help.I don't recommend Velvet if you are around cat/dog/fuzzy-pets a lot, but Velvet can help with sweaty ears if you'd need that.Months into owning these the original ear cushions just got so painful! Koss does have replacements you can buy on their website but the weird gel cushions are not for me.Overall, no matter your ear cushion configuration preference, Pro4AA has a balanced sound quality that I think does not alter sounds. And depending on your ear cushions will affect how well or poorly you can hear the sounds. It's worth a try if you really want to experience your good quality audio or collect more audiophile headphones.Side note: I have yet to figure out what Microphone can be mounted on these headphones... It's hard to find info about it. 3Just like the good old days I bought these headphones to replace my 43-year-old Pro 4AAs, which just gave up the ghost (open left voice coil). I got one-day delivery so I could more easily compare the new and old. My new Pro 4AAs also changed sound *very rapidly* as they were played a bit. Straight out of the box, they were buzzy and harsh. I am glad to say, after a few minutes to an hour, they sound very much like the older model more-or-less exactly what it was in 1974. This is a 90% good thing with the traditional good and bad points of the Pro4AA - very flat response out the high end, slight cavity resonance coloration, and slightly rolled-off very low bass, where it just can't quite make it. And of course, the amazing weight and pressure -they made people a lot tougher in the good old days; pros would wear these things for 8 hours straight, and they are built to take heavy-duty pro use.Compared to other more modern headphones, and my reference Grados, they are much more balanced than many current bass-boosted headphones, like the Sony MDR-70 and kin (mildly overdone), and even more so, the over-the-top overboosted Beyerdynamic DT1350. I swear, after a few sessions with the Beyerdynamic, they could be more crazy overkill bass than the execrable Beats, although much, much tighter. The Koss has, of course, much more isolation than the open-back types of any kind, but interestingly, let through more outside noise than the Supra-aural Beyerdynamics. Portability - forget it. They are heavy, don't fold or stow neatly, and take every bit of voltage the typical iPod pr iPhone can throw. They aren't hard to drive in terms of current at 250 ohms (compared to something like the 32-ohm Grado) but they aren't very efficient, so for me, just short of wide open is a good listening level - again, just like the originals. Plan on an external amplifier if you use a portable music player. Hard to fault the people at Koss for that one - back in 1970, the entire computing power of the human race was about what you get in an iPod Nano, and people listened to stereo on component systems that were still about 50% tube driven. For what you get, the price is definitely right. As I recall, I got my originals at a pretty good sale price of around $35 in 1974-75. After extremely extensive use for about 40 years, they were repaired for free and $9 shipping under the lifetime warranty. Now, they are $75 and have a slightly less lavish limited lifetime warranty. They are more neutral than most other $75 headphones and built like a main battle tank for decades of use. You aren't going to go running with them, unless you want a severe neckache, but if you want some very good and very reasonably priced high-quality home stereo headphones, these are a pretty good choice even after all these years. 4The Standard among working phones ... I've only needed two pairs of Pro-4AA's in over 40 years - they truly are built like tanks, and darned near as heavy. That's a good thing to anyone in a studio performing close to a mike, and they seal in the sound better than any other I've tried. The only construction flaw is the internal connection between earpieces ... every five years or so, they go back to the factory for a $9 tuneup and repair, when after heavy daily use, I "lose an ear." Many moons ago, one of those repairs resulted in a greatly appreciated upgrade - the replacement of those old, liquid-filled ear cushions with lighter, foam ones. Best of my knowledge owledge, that's about the only change since 1970. 5Heavy Duty Headphones These Koss headphones are really a good buy. I own two pairs of these. The physical weight of these headphones are heavy, but this does not bother me at all. Please be aware of this, not a light weight product. These, technically speaking, are studio type recording headphones but will work well for other applications. I have even used them with my iPhone 6s Plus and they sound great. A 1/4" TRS to 3.5mm adapter is required which is of minimal cost and not a problem. The frequency response on these headphones is awesome. These headphones are the "isolation" type with large ear muffs or cups. I use these headphones primarily for my amplifier when I am practicing with my bass guitars. If you are tired of cheap light weight break easy type headphones, then these Koss Pro-4AA's are for you. Heavy duty construction and a 5 star rating, for sure. 5I've only begun to love them...after 5 .months Not for mobile use, your smartphone does not have the power. For that matter neither does one of the excellent fiio portable amps; even the really nice sounding Fiio k5 doesn't have the oomph. Unless you travel real heavy, probably not appropriate for any kind of hotel desktop set up while on vacation. There's lots of cheap stuff that does that really well (Micca Origen G2/Sony MDR-v6...Inexpensive and so very good sounding). You need transformers to push these. Big ones, like a big receiver or integrated amplifier from 1970 and for my preference tubes. Big tube amps, OTL with tubes packing a lot of gain. Darkvoice is adequate. Schitt's venerable Class A Asgaard 2 has struggles just a little with these. You get enough power and the veil lifts but still don't expect 2017 accuracy or detail or completely neutral sound signature. Expect 1970 attributes. Please don't misunderstand, there's enough detail, this was a broadcast headphone in it's day. They are "accurate enough", These are not speedy headphones but transients, feathery details and quiet nuances come across just fine with enough power. An SPL of 95 db at 1mW isn't the lowest around but with an input impedance of 250 ohms that 95 spl can be hard to come by.Let them burn in, I'm not talking about running them on a tube output amp for a week straight but expect them to change with use, a lot of use. I thought I had them burned in after about a week of use when the sound changed but was wrong. the sound has continued to evolve. They get better with age. They are built like a 1970 Ford LTD andare nearly as heavy. You've got time to let them get their legs.Bass... To be blunt. Both suck, bad. Especially at first. They need the mentioned time to burn in a little and the pads. There's sound leak, they're kind of uncomfortable in a squishy sweaty kind of way and I had problems with the head band causing pressure points. I got rid of them and I mean chucked them. Bought some sheepskin HMV5 pads and carefully (there's kind of a method to this) applied those. No more pressure and more bass. Not trunk full'o subs bass but more. About as much as you'd get from well driven HD-600's. I do just kind of like the HMV5 sheepskin pads though. My preferred pad if I'm replacing.Between the amplification issues and the pad issues and the need for burn in time there's a small amount of diy with this headphone. For really good sound there is no plug and play.Isolation: There's a tiny bit of bleed without sound with the better pads in place. It's really not much and once you have sound, you're very literally deaf to the rest of the world.Sound: To my ears solid state amplification is a little screachy with the mid-range present but softened and the lighter bass. On the other hand OTL amplification with appropriate tubes parks the mid and bass right up front and removes that little bit of sibilance. They remain a little tiny bit treble heavy but it's not unpleasant. No longer a little screachy. A word on distortion. None. Nothing audible to me anyway. I've stuck these on my head and twisted the knob as far as I could take it and couldn't hear any. My favorite implementation of these phones is the Nagaoka mp-110, schiit mani phono stage straight through an OTL headphone amp. Lovely, Especially with Jazz, Classical or Blues music.To recap. Pads are terrible, requires appropriate amplification, requires burn in. After that they begin to sound better and better. 4Great headphones, a bit sensitive to revealing flaws in old equipment. I go through headphones quite a bit and I was getting tired of cheap cans with wire fray. I also own a few 1960s amplifiers (tube and solid-state) and I wanted to pair them with some headphones that matched the look and style.These are great headphones. They are heavy and the plastic is very tough. I don't think you'll have to worry about breaking them any time soon.These headphones also sound great! The cups really do help to cancel out any outside sounds. It takes a bit to get used to as these really do seal off a lot so if you wear these for extended periods of time your ears will get a bit sweaty. These headphones also require a break-in period. I had some problems on the first day with them sounding a bit off. Very narrow imaging and the bass was actually really boomy to the point that I could feel it vibrating in my jaw and was giving me a headache. After defeating it a bit with an EQ for a few hours the headphones finally equalled out and now they sound excellent. These headphones do have a bit of a sweet spot. If you're a short person like me (5'5") you might have some wiggle room with the cups. Get them right or the bass will be a bit more overpowering on one channel compared to the other.The headphones are a bit revealing too. If you are using these with a turntable and the azimuth is slightly off these headphones will make it obvious. If you have an old amp with rumble switches and/or low-pass filter switches and one side of the switch is a bit dirty the bass respone will be very obvious to this. So be ready for that as well.These headphones aren't for walking around the house in or jogging. These demand you sit down and enjoy it. So don't expect to buy these and walk around the street in or work with.Other than that, great headphones! Exactly what I was looking for!EDIT: A year later and I have still been using these headphones quite literally every day for at least an hour. They worked great until a lightning crack hit and blew out the right driver in the process. I exchanged the headphones per Koss' warranty program. It only cost me like $9, they even called when they received the package and shipped it priority three day express. Great customer service, great headphones. Thanks Koss! 4
Koss Pro 4 Aa Studio Quality Headphones, Standard Packaging

Koss Pro 4 Aa Studio Quality Headphones, Standard Packaging

4.0
Error You can't add more than 500 quantity.
Regular price
€125,00
Sale price
€125,00
Regular price
€206,00
Sold out
Unit price
per 
Save 39% (€81,00)