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SONY MA900 resistor Mod

post #1 of 2
11/20/12 at 12:20pm
Thread Starter 

   Hi guys, Long time lurker, I bought a sony ma900 a few weeks ago looking for the most comfortable open design (My ears get hot really easy), tried the HD650 but didn't like the build quality and the comfort at all, So I got the MA900, at first it sounded so thin and "weak", like an AM radio.

I EQ 'ed and it got better but still something was "missing", Until I found out about the "compensating resistors" network, WHAT A DIFFERENCE, I took both resistors out, CLARITY, bass is tight, Treble sparkle, etc..Is like the resistors were degrading the signal somehow. Anyone who needs instructions pls ask, I could take some pics too. Anyone who made this mod too please reply to confirm my findings.  I still dont know what SONY ppl are thinking, at least they should put a switch on the compensating network, not everyone has crappy 60 Ohms OI headphone amps.

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post #2 of 2
12/4/12 at 3:30pm
Quote:
Originally Posted by Nemesis12345 View Post

   Hi guys, Long time lurker, I bought a sony ma900 a few weeks ago looking for the most comfortable open design (My ears get hot really easy), tried the HD650 but didn't like the build quality and the comfort at all, So I got the MA900, at first it sounded so thin and "weak", like an AM radio.

I EQ 'ed and it got better but still something was "missing", Until I found out about the "compensating resistors" network, WHAT A DIFFERENCE, I took both resistors out, CLARITY, bass is tight, Treble sparkle, etc..Is like the resistors were degrading the signal somehow. Anyone who needs instructions pls ask, I could take some pics too. Anyone who made this mod too please reply to confirm my findings.  I still dont know what SONY ppl are thinking, at least they should put a switch on the compensating network, not everyone has crappy 60 Ohms OI headphone amps.

Hi Nemesis12345,

 

I'm an MDR-F1 fan and have been curious about the MA900 since they were announced, however was waiting to hear about how they sounded sans the compensating resistor network before considering purchasing a pair. I would be delighted if you would share the "surgery" outtakes and photos for the rest of us...

 

Yeah "I still don't know what SONY ppl are thinking" is my thoughts exactly on both the F1 and MA900... stupid idea.

 

Glad you had success on your surgery!

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