Speakercraft BB50s, can I bridge it? - diyAudio
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Old 5th February 2013, 12:45 AM   #1
Rob B is offline Rob B  United States
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Join Date: Dec 2010
Default Speakercraft BB50s, can I bridge it?

Its not really a pa amp per say but, close enough. Anyone familiar with this amp? trying to use it as a mono amp to drive a single 8ohm sub. The manual mentions nothing of bridgeable or not but a few people that sell the amp claim it to be a bridgeable amp...

also, are these amps worth a crap for powering a sub, any real power? I've never even used the amp.
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Old 8th February 2013, 02:03 AM   #2
Rob B is offline Rob B  United States
diyAudio Member
Join Date: Dec 2010
no one? I tried every which way to bridge it and it sounds odd most ways, goes into protection when pushed. I had it L+ to R+ and when I hook it up the gains are bypassed, amp runs as if gains are full maxed out. when i control it pre amp it plays fine but sounds odd. I didn't have it hooked up true mono on the rcas though, maybe thats the problem,
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Old 8th February 2013, 02:29 AM   #3
Enzo is offline Enzo  United States
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Join Date: Sep 2004
Location: Lansing, Michigan
I see no bridging on it.To bridge a stereo amp you have to apply the same signal to both channels, BUT... one of the channels must be inverted in phase from the other. Opposite polarity of signals if you prefer.

If you apply a signal to both channels as it sits and take off from the + of each side, all you hear is the difference between the two channels, not a bridged signal. The reason it goes into protect is that the two channels wind up fighting one another.

As a 50 watt amplifier, it will not drive a large subwoofer. Might be fine for home stereo system.
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Old 9th February 2013, 12:37 PM   #4
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Join Date: Feb 2008
Location: Sheffield
That's not bridgable. I wouldn't advise trying unless you know exactly what you're doing.

Reason being is that some amplifiers already operate bridged. You can't bridge them twice without causing some serious upset.
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