More measurements. So i followed the guidelines in Austinjerry REW guide to measure output from both the AVR and then from MiniDSP.
MV @ 0 dB, speakers as small, lfe channel @ 0dB, no Audyssey, via HDMI and channel 4 (LFE), and a 60 hz sinustone @-3 dbfs.
This is voltage from AVR sub pre-out.
Right at 1.8V, within Minidsp’s 2V.
Here is after mindsp, but it’s unbalanced as i didn’t know how to connect balanced to measure.
Both MV 0 and -20 which is what i use.
And with Audyssey+DEQ both 60hz and 10 hz. Minidsp output level adjusted.
And finally with my 15db LS
Well within minidsp 2 volt max unbalanced output. Or am i doing something wrong?
Also did a signal chain roll-off test. Connected the good ol Behringer UCA-202, calibrated it and run a loopback measurement to get a baseline. Then measured after AVR, and the MINIDSP.
Pretty much flat to 10hz, and down ~5 db at 3 hz. Not that bad.
However, since i don’t listen at MV 0, i tried again to lower volume to -20 db, and the the roll-off is almost gone. Go figure.