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Koss Pro/4aa and Pro/4AAA

post #1 of 9
9/14/09 at 8:11pm
Thread Starter 
Does anyone know if Koss Pro/4aaa (the 70' model) shared the same drivers as Pro/4aa? Thanks!
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post #2 of 9
9/14/09 at 8:54pm
i think:
the pro 4aaa has a lower impedance than the 4aa (100 ohms vs 250 ohms). the 4aaa sounds superior also, dosent have the weird murky bass and shrill highs -as much anyway!!
i have had the 4aa and have a rebranded 4aaa (realistic pro II)
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post #3 of 9
9/14/09 at 10:31pm
My first pair of big headphones was a pair of Pro4AAAs. I still have them, I still need to buy a set of replacement pads. They weigh a ton are built like a tank.
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post #4 of 9
9/15/09 at 12:04am
Thread Starter 
I currently have a pair of Pro4AAAs that haven't been modified/altered, and I measured the drivers to be 255 ohm. That's the reason I think that both the double and triple As may have shared the same drivers. I don't have a pair of Pro4AA to compare with. I do like the sound of my AAAs.
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post #5 of 9
9/15/09 at 12:13am
Thread Starter 
Quote:
Originally Posted by ourfpshero View Post
i have had the 4aa and have a rebranded 4aaa (realistic pro II)
By the way, do the Realistic Pro II's have 100ohm or 250ohm impedance? Thanks!
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post #6 of 9
9/15/09 at 1:39am
they are 100 ohm 10 -22khz
the plug says 'koss' and they are the same shape
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post #7 of 9
9/15/09 at 2:15am
Thread Starter 
Quote:
Originally Posted by moogoob View Post
My first pair of big headphones was a pair of Pro4AAAs. I still have them, I still need to buy a set of replacement pads. They weigh a ton are built like a tank.
After having ESP 6 and ESP 6a, both of which weigh about twice as much as Pro4AAAs do, I find the AAAs to be quite manageable. I like my vintage Koss phones.

How do you like your Triple-As?
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post #8 of 9
10/21/09 at 12:47am
Koss changed the drivers for the 4aaa's toward the end of their run. Not sure of the ohm, but the black 4aaa are more easily driven than the tan 4aaa.
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post #9 of 9
10/28/09 at 4:35pm

pro 4aaa wanted for trade or sale

need some vintage closed phones for noise isolation
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