In Reply to: Onkyo SP1000 - Space alien background noise only on SACD posted by Toddd on November 4, 2006 at 10:54:30:
...some amps become unstable when presented with ultrasonic tones, and these oscillations can set up secondary ripples down in the audible zone. Easiest way to find out if you have a second amp (or can borrow one) is to try a different amplifier in the system (or preamp-amp if that is what you are using).I've heard of a similar problem ocurring from others, but have never experienced it myself.
Harry
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Follow Ups
- Might be caused by ultrasonic oscillation... - theaudiohiffle 14:08:19 11/04/06 (2)
- filter problems - ted_b 06:46:48 11/05/06 (1)
- I'm pretty sure my machine converts to PCM... nt - Toddd 08:34:40 11/05/06 (0)