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Amplifiers in and of themselves are not inherently designed to be bridged, there are amps that were manufactured with the additional circuitry required to accomplish that in a stable and effective manner. The unstable attempts to do that normally are the result of a part of that circuitry being connected improperly, not being properly accounted for or left out entirely. I am attempting to emulate that circuitry externally as best as I can and requested advice due to the lack of clarity in most of the posts I have found on this topic. I chose this forum as a place to request that information because I do have a great deal of respect for the membership here!
"dont piss around trying to bridge an amp that wasnt designed to"
As best as I can tell there is nothing in either of my posts that could be construed as rude. However since posts in text do not totally transcribe attitude it is possible there was something I missed . If so, I humbly apologize. I certainly did not have any intent of offending anyone, nor do I expect that I will have.
mini-mad wrote: ....and dont be so damned rude!!!! no one is EVER likely to help you with that fuukin' atitude!!!
This certainly assists to say the least! There are a number of useful points in that reply that helped clarify things for me. I have some more comments to add to that, but my puppy is demanding my attention right now.
audiomik wrote: You don't need attenuators to run an Amplifier in bridge mode, a simple reversed phase input - usually channel 2 - by suitably wiring a 'Y' lead to one channel will work, by swapping connections to pins 2 and 3 in the Ch 2 input XLR.
However in order to balance both amplifier channels properly, have both level controls set at maximum.
Use your mono signal source to control level or add an additional single, good quality, balanced line attenuator at the output of your signal source which feeds your amplifier.
Output then is between '+' on the output of channel one 'Hot' and '-' on the output of channel two 'Hot' connections.
Try this into a 6 Ohm dummy load of adequate power rating, with a 'Scope and AC Voltmeter first to ensure that the Amplifier is suitable for what you are trying to achieve
Hope this assists