Originally Posted by AngelEyes
AFAIK this was corrected on the HDMI 1.4 units.
It would be nice to have confirmation of that.
Originally Posted by DanFrancis
I've setup several suite7.1HDs and Rhapsodys - all have PEQ engaged, none of those systems have low level bass noise. Each system has 3+ subwoofers and full range fronts.
As originally described by Adam
, it seemed to be the same problem I found in the SSP-800, which was an issue with the MDA DSP board's firmware, long ago fixed there (early 2010).
What makes it rather elusive is that the problem was not audible in the SSP unless 1) certain PEQ settings were used, 2) certain content was used, and 3) certain listening conditions were used. I think I was the only SSP owner to mention it in 1.5 years, although someone at Classe knew about it, too.
1) Use a gain of -6 to -10 dB or so, and a Q of 5 or higher, at a convenient frequency like 100 Hz to 1 kHz in a main channel (that's where I found it, anyway).
2) Input a sine wave at the same frequency as above. I used a test CD recorded at -12 dBFS, but the level is not critical.
3) Listen in a quiet room. Turn the PEQ band on/off, or adjust the Q to lower values (like 1) and see if background noise is present and changes. If so, that is the problem. If there is no noise under any condition, no problem. (The noise is confined to the channel, it does not spread across other channels of from sub to main.)
Originally Posted by CINERAMAX
The one on audiogon
does not have that problem.
How do you know? Did ADA confirm the 1.4 units use corrected firmware?