[mudihan]

Does anyone know if Koss Pro/4aaa (the 70' model) shared the same drivers as Pro/4aa? Thanks!

 

[ourfpshero]

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)

 

[moogoob]

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.

 

[mudihan]

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.

 

[mudihan]

Quote:

Originally Posted by ourfpshero /img/forum/go_quote.gif 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!

 

[ourfpshero]

they are 100 ohm 10 -22khz
the plug says 'koss' and they are the same shape

 

[mudihan]

Quote:

Originally Posted by moogoob /img/forum/go_quote.gif 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?

 

[itza2mer]

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.

 

[techenvy]

need some vintage closed phones for noise isolation