Bridge a stereo amp using cabling only

[dschwark]

Hi all, Stupid question probably.

Using only cabling, Is it possible to combine the output signal of a stereo left and right channel, into one channel for powering a subwoofer? For example I have an amp that is rated at 300 watts per channel. Could I combine the signal using cabling (there is no bridge mode on the amp)...and A) not burn the amp up, B) (assuming "A" is possible)see an improvement in power output to the sub?

If not, could I run the stereo amp using one channel for the subwoofer at the rated 300 watts, and not use the other channel?

Thanks for your help
For Reference
Amp Model and type TPro DA-B3000 digital amp..

Thanks for your help..
Dan

 

[adwilk]

It doesnt look like theres much info available on that particular Amp, but it is bridgeable.... Most class D's are as they are efficient, that said, the ratings on that amp seem weird to me. 3000 watts max power seems extremely high. Hopefully its a steady 300 per channel though. Since its XLR, I'd look for a switch on the back of that thing or a diagram on bridging. Otherwise, we'll have to walk you through the process of bridging the thing... its not hard. What kind of sub do you have?

 

[bandphan]

What sub are you trying to power?

 

[highfigh]

Hi all, Stupid question probably.

Using only cabling, Is it possible to combine the output signal of a stereo left and right channel, into one channel for powering a subwoofer? For example I have an amp that is rated at 300 watts per channel. Could I combine the signal using cabling (there is no bridge mode on the amp)...and A) not burn the amp up, B) (assuming "A" is possible)see an improvement in power output to the sub?

If not, could I run the stereo amp using one channel for the subwoofer at the rated 300 watts, and not use the other channel?

Thanks for your help
For Reference
Amp Model and type TPro DA-B3000 digital amp..

Thanks for your help..
Dan

With cabling only, I'd have to say no. Most stereo amps need one normal feed and an inverted feed, connecting the speaker only to the positive speaker terminals if the amp doesn't isolate the two channels. You have a low Z/Balanced input (it should be if it's using XLR, but it's not always the case) which is supposed to have a normal (Pin 2) and inverted signal (Pin 3) but if you want to do this the right way, it won't happen without a summing network and some way to bridge the amp. Personally, I would use an amp with a crossover for this, not a basic stereo amp unless it was easily bridged and I was feeding it with a receiver that has a low pass output.

 

[mtrycrafts]

... For example I have an amp that is rated at 300 watts per channel. Could I combine the signal using cabling (there is no bridge mode on the amp)...and A) not burn the amp up, B) (assuming "A" is possible)see an ...Dan

Right there is your answer: 'there is no bridge mode on the amp'

If the amp doesn't have such a mode, it is not possible.