[Casshern]

Hallo,


i have a very strange problem with my new onkyo 876 and my subwoofer (Heco Celan Sub 30A).

A few days ago i measured my system with audyssey and the sub worked fine - i mean not perfect, but it was ok (it was measured a little bit too silent).

Today when i started my homecinema-system, i sadly discovered, that my subwoofer doesn´t work. I didn´t change anything since the last day i had my system on. So i started to test everything that came to my mind with the following results:


- The Subwoofer works absolutely fine with another AVR

- The Onkyo also works fine with an older subwoofer

- My Bodyshaker-Amp works fine connected (via Sub-Preout) to my Onkyo

- If i connect my Shaker-Amp and the Sub via an y-cable with the preout of the onkyo, only the Shakers work - the Sub is still quiet.


I also tested another subwoofer-cable, but still no achievement.


So both devices are working, but not together

.


I really have no idea, what problem this could be. Has somebody of you an idea ?


Sincerely,

Alex

 

[4DHD]

Try re-running audyssey. maybe that will get it going.

 

[Casshern]

I allready did that - while measuring the sub, there came no sound from the sub.


I also reseted the onkyo, but still no sound, when i activate the calibration-sound.

 

[4DHD]

try connecting the sub via speaker line input.

 

[Casshern]

For what ? The subwoofer works - with another AVR.

Ohh i forget to mention: If i enable the auto-standby on my subwoofer and wait until the sub is in standby and then start calibration system on my onkyo - the subwoofer gets on. So, he gets a signal only there is no sound.

 

[4DHD]

Obviously, something is wrong. But if was me, and I couldn't figure it out and wanted to use that sub, I'd connect it, using speaker wire input on the sub. And if that worked, I'd leave it that way.


You might think this a stupid question, but, have you looked at the sub's volume control to make sure it didn't get accidently turned down?

 

[AndrewS99]

Check the back of the 876. There are 2 inputs that say sub. One says Multich Subwoofer, the other says Pre-Out Subwoofer. The one you want is the one on the right as you look at the back of the receiver - the Pre-Out Subwoofer.


Also, make sure you defeat any filtering built into your sub. Turn off/disable the crossover on your sub amp if you have one. That could also cause what you are experiencing.