Troubleshooting VTF-2 MK 2

[dough]

Hi All,
For some reason, I'm getting no sound from my Hsu sub. It has worked in the past, but recently the set up is quiet, even during bass-heavy music (e.g. Massive Attack) or films (e.g. battle scenes from LOTR ROTK). All other channels of 5.1 set-up work fine.

Set up is as follows:
Pioneer VSX-D912 using 5.1 set-up
Pioneer set to FS-CS-SS (tells receiver all speakers - front, center, surround - are "small"), SB-** (surround 'back' used for 7.1 set "off"), crossover set to 100Hz, LFE attenuator set to infinity, Subwoofer set to "YES", advanced surround set to "Movie"
VTF-2 MK 2 set to "On", crossover set to "out" and 90Hz, 1 port open, phase 0', volume ~25%, sub connected using 25' THX coaxial cable plugged into receiver's coax sub out.

If the Hsu is set to "Auto" rather than "On", the LED is red when the receiver is off and is green when receiver is on and there is a signal coming to the Hsu. I've checked that all cables are connected and all components are on.

Anyone have any thoughts on what's going on?

Thanks,
D

[Pete_Hsu]

Hi dough,

If I understand correctly, you still get a green light from your amp led, but no sound from the unit, right? One quick check you can do is to unscrew the amplifier (remove perimeter screws), and verify that the speaker wire is firmly connected between the driver and amplifier.

Feel free to send an email to techsupport@hsuresearch.com . Sometimes over time there can be some wear and tear that causes capacitors to dry up, or some resistors to fail, or something like that. We will have one of our technicians troubleshoot with you via email, and go ahead and include a phone number where you can be reached at too.

Sincerely,

[dough]

thanks, Pete. tech support suggested verifying the sub was working by connecting it to a different source - i hadn't tried that because i wasn't sure whether you could connect with a non-coaxial input. having hooked the sub up to my ipod i was able to confirm that the sub is not the problem. it looks like it's the receiver. i appreciate the responsiveness of everyone at Hsu! - D

[Pete_Hsu]

Thanks for the update dough, always happy to help!