Noise from USB power


G

Gingangooli

Anyone experienced electronic noise (tweets and warbles!!!) when using
headphones which get their power from the USB?

I have an Abit BD7-11, and no matter what USB ports I try (the two ports
hard-mounted on
the back mobo panel, or the external USB ports wired from the USB connector
on
the mobo itself), I get interference.

Its a self-build PC with a decent(?) Enermax 435W PSU, but from that I
realise it might be something to do with the built quality of my PC (i.e. my
fault) but has anyone experienced it and know of anything to try?

The headphones in question are edimensional AudioFX, with mic and audio
plugged into a Creative Live 5.1 Digital card. The USB connection powers an
amplifier built into the headphones for subwoofer-type vibration effects (so
no actual audio via the USB). Turn the amp on and I hear the noise, turn it
off and it disappears (or becomes inaudible).

I've tried the phones in my laptop and they work OK, so obviously the prob
lies in my PC, but any advice or suggestions would be appreciated.

I've also tried another pair of phones of the same make - same problem.

tia

ginga
 
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R

Richard Dower

Gingangooli said:
Anyone experienced electronic noise (tweets and warbles!!!) when using
headphones which get their power from the USB?

I have an Abit BD7-11, and no matter what USB ports I try (the two ports
hard-mounted on
the back mobo panel, or the external USB ports wired from the USB
connector on
the mobo itself), I get interference.

Its a self-build PC with a decent(?) Enermax 435W PSU, but from that I
realise it might be something to do with the built quality of my PC (i.e.
my
fault) but has anyone experienced it and know of anything to try?

The headphones in question are edimensional AudioFX, with mic and audio
plugged into a Creative Live 5.1 Digital card. The USB connection powers
an
amplifier built into the headphones for subwoofer-type vibration effects
(so
no actual audio via the USB). Turn the amp on and I hear the noise, turn
it off and it disappears (or becomes inaudible).

I've tried the phones in my laptop and they work OK, so obviously the prob
lies in my PC, but any advice or suggestions would be appreciated.

I've also tried another pair of phones of the same make - same problem.

tia

ginga

Your PC is about to explode...plug it out!!
 
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