Originally Posted by Pieface1
I hadn't considered the sub trim on the AVR sending a weak signal. I am at -5 currently (-12 to 12 scale).
Ok so you have a bit of room to play with. Without changing the overall level, you could double the signal from the AVR (adding 6 dB to +1, which would still sit pretty close to the middle of the trim range), while reducing the sub gain by the same amount, -6 dB. Doubling the signal from the AVR may very well do the trick to reliably trigger the auto-on feature at lower listening levels.
Or you could just run the sub a bit hotter
The relevant spec on the AVR for output seems to be 1V, 470 ohm on the pre-outs, which I'm assuming includes the sub-out as there is no seperate listing.
All pre outs should have the same specs indeed. I think this varies a lot depending on the AVR. What is yours again? I've had three previously. The manual on my older Pioneer 1020 doesn't spec the pre outs. On my Onkyo 818, the rated output is 0.2V and max output is 4.6V (470-ohm impedance seems standard). On my Denon X4000, the analog outputs are rated at 1.2V. So right there the rated output from the Denon looks to be 6 times the rated output on the Onkyo. Perhaps I'm reading the specs wrong but it seems the figures are all over the place depending on the AVR. That makes it though to choose an appropriate threshold for the sub amp's standby mode I guess.
I'll admit I get a bit hazy on output specs vs input specs of the different bits if equipment (does SVS even publish them for the sub side of things? ) - I blame a lifetime of all in ones and integrated amps!
The whole picture is fuzzy I think
And no I've never seen the numbers (e.g. the voltage threshold for waking up an SVS sub). It may also be a sustained level for some duration, who knows. Anyway, the trick is to raise the sub's input to facilitate wake up.
I will have a muck around with the levels when my UMIK1 gets here.
Since the UMIK-1 is calibrated in an absolute manner, you will be able to use it as an SPL meter too with REW, so it will come handy.
I figure a minidsp is on the cards but want to measure up first and work out the best way to proceed, looking at the whole audio spectrum, with the limited funds that trickle through as play money with a young family.
Yeah, and while this is not necessarily encouraging for you, depending of the age of your kids, you may not even have much time to play with it anyway
I haven't played with mine since my we had our second kid. It's been a year now... Then again, it's a set-and-forget thing, mostly.