Yamaha CM500 / KOSS SB40

[Malcolm-2]

Can some one who has a pair of these tell me if there is any electronic noise reduction circuitry in the headphones or is it by physical isolation only please?

Sorry to be off topic

Malcolm
G0MIC
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[Dick Dievendorff]

My Yamaha CM500 does not include electronic noise reduction.  

The supplied battery box is for bias, and isn't required if you can get bias
elsewhere, like a PC microphone connector, or a K3 with microphone bias
turned on.

Dick, K6KR


-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Malcolm
Sent: Saturday, February 18, 2012 10:18 AM
To: [hidden email]
Subject: [Elecraft] Yamaha CM500 / KOSS SB40

Can some one who has a pair of these tell me if there is any electronic
noise reduction circuitry in the headphones or is it by physical isolation
only please?

Sorry to be off topic

Malcolm
G0MIC
______________________________________________________________
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