Originally Posted by rukus29
Thanks for the tip on acoustic timing!! I plan to work through Matt’s excellent sub/main integration thread which covers setting distance, polarity, etc.
In the meantime, I decided overnight to build a third one of these, if only to act as a stand for my Center channel haha. Will then see what need in terms of rear subs, near field, etc.
Any good links to threads on how to set the gain attenuation knobs on inukes (or other amps)? I’m confused on how to do this since people talk about sending signals/playing Test tones and seeing if the amp clip lights blink - but there’s no mention of what volume on the AVR to do that at. Seems to me it is volume dependent (since that determines the pre-out voltage). And what happens when I run Dirac auto eq, won’t that mess it up? Or am I misunderstanding output clipping and it can occur at any master volume/ie is independent of master volume?
I’m certainly no expert with rack amps comparatively to gain & clipping but, I spent an hour or two yesterday running test with my microcube.
could share some insight on this further.
This is how I went about the process.
I first reran my AutoEQ which is YPAO, from there I opened REW’s generator & SPL meter. With the signal at -12dbfs (in the generator) I then ran pink noise through my fronts adjusting my AVR master volume until it read 75dB. Then I went back into YPAO and adjusted each channel independently to 75dB, some were 1dB off others .5, etc. until all were at a 75dB reading.
I then pulled up John Wick chapter 2, I enjoy this movie as the first 2 minutes is a loud car chase, set my AVR to my loudest preferred listening level (master volume) and started adjusting the AVR sub trim to correlate with the input signal meter on the iNUKE software with the output meter. In my case, especially since most Yamaha’s send out 1v vs most other AVR’s sending 2v I had to boost my trim level compared to a traditional sub you’d buy online. I made sure on my loudest master volume that the input level never clipped. I’ve always heard you want at least 3dB headroom but, 6dB is preferred.
Also I should mention I had the gain knob on the faceplate of the amp set to 3pm. Once I made sure my input was not clipping I then went back into the iNUKE software to the filter/crossover tab & started adjusting the gain into the positives to see what my limit was before clipping the output. Once I found a good correlation between the two (input & output meters) I then went back to the gain knob on the faceplate & turned it back a couple of clicks.
Now again I’m no expert on signal clipping along with clipping the amplifier but, I believe it’s better to test multiple straining action scenes rather than a sine wive, etc as it’s the peaks that will force clipping to occur.
Again hopefully John can chime in to add or subtract from my statement and your question but, this was my method.