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Low output volume from powered sub woofer

Hi all , I have a SVS-PC13 u tube sub with a Bash amp , it powers on fine and works with the test tone but at a very low volume output , (It has been working fine)

I have tested the processor output with another active sub and that seem to work fine ..

I have taken the plate amp out and tested the dc output , it is only 10.5 Vdc , does this sound low ? and would that cause the low output .

Here is a photo of the dc supply

https://www.dropbox.com/s/vmqf5e902pw7b1...

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Update , I guess the 10.5 vdc is correct , (it seemed low compared to other amps i have worked on) ,

I found a bad joint on resistor 103 and a 100 uf cap (C203) was bad too (see pics) . It is working fine again now ..

https://www.dropbox.com/s/c7yzm5nup8fjwr...

https://www.dropbox.com/s/pic4y3h2dobso0...

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markparnell1972 will be eternally grateful.
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