Combining left and right output to one speaker

Combining left and right output to one speaker

Postby Meili [OP] » May 19th 2019, 8:02pm

Anyone done it? Tried to do research online and found polar opposite answers. Camp one is: don't do it, your amp will instantly go into meltdown and cause the fall of western civilization. The other camp: done it for years with no problem.??? Also have seen, one speaker with both + outputs used, one attached to the + and one to the - on the speaker. Another shows using the + from one side and - from the other. I have a nice center speaker that I would like to use with the TV in the van. thoughts?
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Re: Combining left and right output to one speaker

Postby Mmusicman » May 19th 2019, 10:02pm

The reason you are getting "conflicting answers" is because there is no "one answer fits all". Some amps "may" accept joining outputs.. others may not. Technically however, you shouldn't be combining outputs. You may get away with it for a while, or you may blow a channel instantly.

It is possible to "bridge" many amplifiers to a single channel.. output power will double but load impedance will be limited. Some amps will do a simultaneous stereo/mono configuration as well.
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Re: Combining left and right output to one speaker

Postby fabinator » May 21st 2019, 8:20am

Some amps allow combined outputs of you use a speaker of twice the impedance. Another option is to use a dual voice coil speaker.
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Re: Combining left and right output to one speaker

Postby Nikko » June 4th 2019, 3:17pm

Agreed. The dual voice coil speaker is the best solution.

You can only combine two outputs if the amp allows "bridging". You must also observe the minimum impedance or the circuit may go into thermal runaway, especially if you are driving a woofer.
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Re: Combining left and right output to one speaker

Postby markmitch » June 4th 2019, 3:29pm

I have done it in a pinch with DJ equipment, I was DJing a wedding and one of my amp channels blew within the first hour of the gig so I ran both speakers off one channel but only for a couple hours then as soon as the gig was done I took the amp to be fixed and bought a back up amp for the future. learned a valuable lesson that day. Always carry back up equipment. But I was just starting out it was like my 4th or 5th gig. Funny thing is I sold all my equipment except for a small 100 watt house stereo amp I used to push a sub for dancing only. That small amp is now hooked to my pc in my garage just for me to listen to music while working on my Astro! sorry went off the subject there lol
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Re: Combining left and right output to one speaker

Postby Nikko » June 4th 2019, 5:18pm

He is asking about combining two amplifier channels into one speaker.

FYI. When bridging an amp the speaker (load) must be connected to the two positive terminals.
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Re: Combining left and right output to one speaker

Postby markmitch » June 4th 2019, 6:10pm

oh my bad -sorry I misunderstood,
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Re: Combining left and right output to one speaker

Postby Nikko » June 5th 2019, 3:06pm

It's ok markmitch, I misunderstand some things myself.
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