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Daisy Chain Amplifiers? Answered

I have a couple amplifier chips, and i would like to know how i could daisy chain them (connect them together for more power)

i am using STMicro TDA7266s pdf
i have tried putting amplifier chip in series with each other (not the outputs, but all the pins)



you need it to output high current at low voltage see what identical chips you have i assume from here on that they are like power opamps connect them in parallel on all pins except output connect a dc filtering capacitor of its own to the output of each connect the outputs of the capacitors together to the speaker output

. Starting a new thread to give more room. > what if i were to use a TPA3122D2 . It will do bridging (see Differential Input and BTL Output on page 18). . To do paralleling properly, you need to have access to the op amp inputs. Neither the TDA7266 nor the TPA3122D2 have the pins for that.

. Daisy-chaining two audio amps (using the output of one to drive the input of another), won't work unless the second amp is designed for a very high level input.

oh, i thought daisy chaining was wiring two amp's input in series...

. OK. Not what I think of when I see daisy-chaining. . Wire the inputs in parallel. Most amps have a fairly high impedance (~30KΩ for your amp), but if your source won't handle two, then add some resistors in series with each input. . If you must wire them in series, then wire the inputs as you would batteries; jumper + on one to - on the other. Doesn't look like that option is available with your amp. :(

. Doesn't look like you can with your amp. You just swap +/- on one amp. The output of one amp is + to the speaker, the other amp is the - side.

. Depends on what Class amplifier you want. Looking at the PDF in your OP, you can't do it with the 7266.