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Old 13th December 2004, 04:47 AM   #1
virenb is offline virenb  India
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Default Bridging

Some manufacturers provide a switch to bridge a stereo valve amp to a higher powered mono amp. How is that done in a valve amp with two output transformers?
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Old 13th December 2004, 08:07 AM   #2
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It isn't. :P

If you must, get two amplifiers with 4 ohm taps and connect them in series (+1 to speaker, -1 to +2, -2 to speaker). Be absolutely sure they aren't grounded together internally!!! (Likely if the amps have NFB.)

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Old 13th December 2004, 11:52 PM   #3
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Default so what's more efficient????

... a pair of bridged SE amps,
or a mono PP amp?

Pete McK
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Old 14th December 2004, 12:08 AM   #4
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PP if it isn't class A. Always.

In fact, class AB or B or C SE is as efficient... but you can't stand the distortion so it's a moot point.

Tim
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