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Old 27th July 2011, 05:24 PM   #1
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Default How do I disassemble Koss Pro 4AA

I have a speaker cutting out on my 4AA's It is obvious it is a broken wire because I can wiggle it at the strain relief and short out the speaker.
Where do I start in the disassembly of these? I have looked for service manuals but cannot find one for this model. I have searched this website but cannot find the information I need.
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Old 30th July 2011, 12:16 PM   #2
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Old 2nd August 2011, 08:58 PM   #3
DaveG is offline DaveG  United States
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I think these are basically the same as the esp-9's I just found.
On mine, after I gently pried up an edge of the ear cushions and popped them off, there were 4 screws to hold the cups on.
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Old 4th August 2011, 01:17 AM   #4
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I'll check that out. Thanks. I didn't want to tear the cushions.
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Old 4th August 2011, 07:13 AM   #5
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Quote:
Originally Posted by stereodude27 View Post
I'll check that out. Thanks. I didn't want to tear the cushions.
Be VERY careful when removing the clips into the drivers. Is very easy to pull out the pin and the voice coil wire is astonishingly thin. What I did on mine was simply cut a 1-2" pigtail and solder the wires to the original leads. A short piece of heat shrink tubing will keep it good. I used a piece of Belden 9451 to replace the left to right jumper between the ear pieces.

Koss still sells fluid cushions for the Pro-4AA for $5 a pair. These can be used on the ESP-9s but will be quite difficult to install because the ESPs are a little larger. Warming the cushions with a hairdryer makes it much easier to install.

G
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Old 29th August 2011, 01:02 AM   #6
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Quote:
Originally Posted by stratus46 View Post
Be VERY careful when removing the clips into the drivers. Is very easy to pull out the pin and the voice coil wire is astonishingly thin. What I did on mine was simply cut a 1-2" pigtail and solder the wires to the original leads. A short piece of heat shrink tubing will keep it good. I used a piece of Belden 9451 to replace the left to right jumper between the ear pieces.

Koss still sells fluid cushions for the Pro-4AA for $5 a pair. These can be used on the ESP-9s but will be quite difficult to install because the ESPs are a little larger. Warming the cushions with a hairdryer makes it much easier to install.

G

Great tips, thanks.
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