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Old 01-23-2019, 11:25 PM   #21
momaka
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Default Re: Logitech X-230 PC subwoofer powerless

Check the amplifier IC datasheet first before feeding it that voltage!
14.4V AC = 20V DC
21V AC = 29V DC
It might not be able to take it. OR, it may run too hot with the current speaker load (higher input voltage means the amp can output more power to the speakers before clipping, but will also dissipate more heat.) If the heatsink for the IC is marginal, I wouldn't push that extra voltage and simply run just with the 10.5V AC tap.
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Old 01-27-2019, 02:50 PM   #22
steves7839
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Default Re: Logitech X-230 PC subwoofer powerless

Quote:
Originally Posted by momaka View Post
Check the amplifier IC datasheet first before feeding it that voltage!
14.4V AC = 20V DC
21V AC = 29V DC
It might not be able to take it.
I tried it. There was no sound from the speakers. But no harm done. Once I went back to using the center tap, it works again. Been blasting music from my phone for two hours. The transformer stays cool. Waiting for glue to dry before I reassemble the woofer to the cabinet.

Thanks to all for pointing me in the right direction!
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