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Old 14th July 2005, 11:14 AM   #1
DPK is offline DPK  India
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Red face Connecting Two Stereo Amps together


How two stereo amps. (100rms/channel and 50 rms/channel of different brand) can be connected together to increase overall power.

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Old 14th July 2005, 11:22 AM   #2
Wynand is offline Wynand  South Africa
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Personally I wouldn't put two amps in series with each other.

You can only go as loud as the voltage rails of each amp, and even if your amps survive it, you'll be amplifing the distortion/noise from the first amplifier with the second one.

Unless someone else knows more, I don't think you'll gain anything, just noise.
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Old 14th July 2005, 11:41 AM   #3
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In order to connect the amplifiers together, you could always use a bridge type configuration. The easiest way I believe is to build yourself two inverters and apply them to the inputs of both channels of one of your amplifiers, then you could bridge the configuration channel to channel.

However, when you really start to think about it...what can you really do with 150 watts that you can't do with 100? What is your application and/or need for a larger amplifier? Perhaps it isn't even necessary?

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Old 14th July 2005, 12:55 PM   #4
macboy is offline macboy  Canada
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The difference between 150 W and 100 W is only 1.7 dB, which is only a marginally noticable difference. In any case, you cannot connect two different amps together in any way to get a single higher power output.
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Old 14th July 2005, 01:11 PM   #5
HDTVman is offline HDTVman  United States
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The only way to use 2 dissimilar amps on the same channel is in a biamp setup. Generally the lower powered one for the high frequencys and the higher power one for the low frequencys. This requires a crossover before the amps (this would be an active, low level crossover) and the speaker drivers are connected directly to each amp.
What ever makes the tunes flow
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Old 14th July 2005, 01:42 PM   #6
DonoMan is offline DonoMan  United States
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HDTVman is "probably" right. You CAN put them in series, but only if they can take the increased current, which is unlikely unless you're using like a 16-ohm load. So biamping is your best bet. Or, of course, build a bigger amp
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