Koss Pro 4AA

[indago]

I have two sets of Koss Pro 4AA Earphones that I purchased around 1965. I
use them for television programs, especially the good movies. I like these
particular sets because the bass is not so prominent and the buzz that is
inherent in the tv does not seem so prominent in these phones as some of the
newer earphones.

I am having problems with the sound reproducers. While I am watching a
program in stereo, I can detect the left channel beginning to fade, the
moreso, until it is completely off, while the right channel continues. I
have a long stereo cable from the tv to the headphones, about 10 feet. I
have checked the cables and these are not the problem. I can apply the
leads of a 1.5 volt batter in a battery holder, scratching the leads onto
the stereo connector, and the right side is quite clear with the pulses, but
the left side is dead at first, and then recovers and responds to the
pulses.

I would like to know if anyone has had a similar problem with these
earphones. I don't want to send them back to Koss for replacement of the
reproducer because they might put in one that has a greater bass response
and I don't want that for these particular earphones.

 

[Watson A.Name - \Watt Sun, the Dark Remover\]

I have two sets of Koss Pro 4AA Earphones that I purchased around 1965. I
use them for television programs, especially the good movies. I like these
particular sets because the bass is not so prominent and the buzz that is
inherent in the tv does not seem so prominent in these phones as some of the
newer earphones.

I am having problems with the sound reproducers. While I am watching a
program in stereo, I can detect the left channel beginning to fade, the
moreso, until it is completely off, while the right channel continues. I
have a long stereo cable from the tv to the headphones, about 10 feet. I
have checked the cables and these are not the problem. I can apply the
leads of a 1.5 volt batter in a battery holder, scratching the leads onto
the stereo connector, and the right side is quite clear with the pulses, but
the left side is dead at first, and then recovers and responds to the
pulses.

I would like to know if anyone has had a similar problem with these
earphones. I don't want to send them back to Koss for replacement of the
reproducer because they might put in one that has a greater bass response
and I don't want that for these particular earphones.

It's been decades, but I had a pair, I think not the double A. If I
remember correctly the 'woofer' and 'tweeter' were in series. First,
tho, check to see if it's an intermittent connection or the cabling. If
not, then you might bypass one or the other of the speakers to see if
it's in one of those. If it is, well, I don't know where you could get
one other than the factory. You might be able to repair it, but the
wires on those things are super fine, and difficult to work with.