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About this product
Product Information
The standard-setting design of the Koss PRO4AA dynamic headphones incorporates performance-enhancing technology that delivers a high fidelity and true full frequency performance to your ears. These headphones meet the stringent demands of recording and broadcasting professionals who need superior performance and reliable equipment. The Koss PRO4AA headphones deliver exact reproduction and sound intensity and offer superior isolation by keeping unwanted sounds out while letting every note in.Product Identifiers
BrandKoss
MPN160630, PRO4AAT, 160630 PRO4AAT PRO/4AA, PRO/4AA
UPC0021299102725
ModelPRO4AA
eBay Product ID (ePID)92379909
Product Key Features
ConnectivityWired, 6.35mm
ColourBeige
FeaturesAdjustable Headband, Noise Isolating
TypeEar-Cup (Over the Ear)
Additional Product Features
Brand ColourBeige
Connectivity TypeWired
Impedance250 Ohms
Frequency Response10Hz-25KHz
Number of EarpiecesEar-Cup (Over the Ear), Headband
UseHome Audio & Hi-Fi
Sensitivity95dB
Ratings and reviews
Most relevant reviews
- 25 Jan, 2020
Fantastic sound quality even by today’s standards
I remember back in the eighties my father having a pair of these headphones. Which prompted me recently to find a pair. Well I’m about 7 pairs in so far, and have finally found a fully working pair that the pads have not gone flat on. You will read online that Koss will supply replacement pads for only $5.00!! Which is fine if you living in the USA, but equate to about £60 in the UK via a European spares supplier. The biggest issue I have found with vintage pro 4aa’s is either open circuit drivers, faulty jack leads, and even the cable running through the headband. The biggest and most painful fault is the fact that the ear cushions shrink, and go hard. To a degree you can split the pads open and fill with foam, but this is by no means ideal, as ear cushions on most headphones do have an effect on overall sound quality. If you do get a good pair, you will be pleasantly surprised with the sound quality. They really are good, considering the design is over 40 years old. They are not lightweight, and not the most comfortable headset, but I found this was easily made up by the neutral and controlled sound quality. Not as flat as a pair of DT-100’s, but certainly more suitable for studio and easy listening. The impedance of 250 ohms does render them not the loudest phones for use with portable devices, and they are not exactly a fashion statement. But for home hifi, or I’m the studio, they will handle a pounding. I have many pairs of vintage Koss headphones, and these certainly were the most pioneering model they made. However the pro 4aaa is more comfortable and sound marginally better, even though they have a similar driver configuration. I’m not saying they beat modern helpings from Sennheiser, AKG or Beyer. But for the curious audiophile or collector, they are worth a go.Verified purchase: Yes
- 17 May, 2017
Oldskool but good
These headphones are from the 1970s and are fairly heavy, but have a very good sound and decent noise isolation from the outside world. I've been very impressed with mine. One thing to note is that, whilst a mobile phone or MP3 player will drive these, they're quite high resistance and prefer proper hifi amplification or, preferably, a dedicated heaphone amp for best results.Verified purchase: YesCondition: Pre-owned
- 01 May, 2020
Very happy with them awsum sound and from back in the day
Excellent sound crisp and clear comfortable to wear but heavy which I don't mind like most vintage equipment they were made to lastVerified purchase: YesCondition: Pre-owned
- 11 May, 2016
Old Skool
As I Remembered ThemVerified purchase: YesCondition: Pre-owned
