2. home-theater
  3. 157833-102920

Sub Not Waking Up

I have a Yamaha CX5100 Receiver and two Sunfire HRS8 subs.  I moved my equipment around in my cabinet, got a new am to power my R/L, and new R/L speakers.  I am still using the same center, rear, and 7.1 channel amp to power the others.  

My problem is my subs will not turn on.  I ran the Yamaha YPAO and sound came from them and it configured them at 2.5.  But after they will not work.  I think they are going in standby and not getting a signal to turn on but for the life of me I cannot figure out why.  

I have another Velodyne sub in another room and it works fine and the Sunfires work fine in the other system.  It is just the sunfires with the Yamaha.

Any suggestions would be appreciated.

Thanks,Mobius
mobiusmu

Showing 2 responses by bkeske

bkeske's avatar
bkeske
5,596 posts
 
@mobiusmu 

I know this may seem elementary, but do your subs have gain control? Make sure they are turned-up if so.

Using YPAO in the receiver itself sets volume/gain within the receiver, yes, but some have found if the gain is not turned-up at the sub itself there could be an issue with it triggering on at ‘start-up’ volumes, or, not enough initial gain to trigger it. Once the volume is adequately turned up at the sub itself, then adjust via YPAO, or within the set-up settings. Personally I have never found the YPAO settings to be adequate for correct sub settings via LFE when I used to run my sub that way. I always manually adjusted its gain within the receiver settings with a meter.
bkeske's avatar
bkeske
5,596 posts
 
Actually YPAO is notorious for setting the sub level via LFE too low regardless of the gain setting at the sub, which as I said, thus I always adjusted it manually when using LFE with my receiver. Albeit I don’t do that anymore.

But yes, as I also said, most probably the sub gain is set too low.
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