A couple of weeks ago, I started working on my Realistic Pro-60 headphones. Pro-60s are re-badged Koss HV/X headphones. I originally purchased my first pair of Pro 60s after listening to a pair HV/1LCs. At the time, I thought they used the same driver element. I remember being disappointed in the Pro 60s, as compared to the sound of the HV/1LC. I soon started digging the Pro 60, and even bought a second pair in the early 90s.
I recently discovered that the HV/X (Pro 60) shares nothing in common with the HV/1LC. The 1LC uses the same "series one" driver as the HV/1, and the original ProAAA. Koss retained the design of the driver, and the current model ProAAAT uses an updated (and degraded) version. Several sources on the internet opine that this driver made the best sound of any dynamic driver ever produced by Koss. So this is why it was my 'first love' when it came to headphones.
Enough back story, already.
I decided I needed a pair of HV/1LCs, and took a chance on Ebay. The left "speaker" was said to be intermittent. I found that the slip-on connector had come loose from one of the pins on the driver. It was exactly what I was hoping for....because the replacement drivers aren't available.
An overview. Disassembly requies a 4mm nut driver.
The coveted series one driver, ferrous magnets, nylon housing
Deteriorated scrim cloth
New scrim, gave the pot a deoxit Tx.
The project is coming along nicely. I just ordered a pair of white PU leather ear pads. I'll post some more pics later in the week.
I recently discovered that the HV/X (Pro 60) shares nothing in common with the HV/1LC. The 1LC uses the same "series one" driver as the HV/1, and the original ProAAA. Koss retained the design of the driver, and the current model ProAAAT uses an updated (and degraded) version. Several sources on the internet opine that this driver made the best sound of any dynamic driver ever produced by Koss. So this is why it was my 'first love' when it came to headphones.
Enough back story, already.
I decided I needed a pair of HV/1LCs, and took a chance on Ebay. The left "speaker" was said to be intermittent. I found that the slip-on connector had come loose from one of the pins on the driver. It was exactly what I was hoping for....because the replacement drivers aren't available.
An overview. Disassembly requies a 4mm nut driver.
The coveted series one driver, ferrous magnets, nylon housing
Deteriorated scrim cloth
New scrim, gave the pot a deoxit Tx.
The project is coming along nicely. I just ordered a pair of white PU leather ear pads. I'll post some more pics later in the week.
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