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Bridged and paralleled amplifiers - Wikipedia
https://en.wikipedia.org/wiki/Bridged_and_paralleled_amplifiers#:~:text=A%20paralleled%20amplifier%20configuration%20uses%20multiple%20amplifiers%20in,output%20impedance%20of%20the%20pair%20is%20now%20halved.
Paralleling Amplifiers Improves Signal-to-Noise ...
https://www.analog.com/en/technical-articles/paralleling-amplifiers-improves-signal-to-noise-performance.html
The SNR calculation for two amplifiers in parallel is: SNR (two amplifiers) = (2S IN *G) 2 / ((2N IN *G) 2 + (√ 2 ((N AMPL1) 2 + (N AMPL2) 2))) = (2S IN *G) 2 / ((2N IN *G) 2 + (√ 2 N AMPL) 2) = (S IN *G) 2 / ((N IN *G) 2 + 0.5*(N AMPL 2)). Again, assuming the external input noise power is minimal reduces this to (S IN *G) 2 / (0.5*(N AMPL 2))
Paralleling Amplifiers Increases Output Drive | Analog …
https://www.analog.com/en/technical-articles/paralleling-amplifiers-increases-output-drive.html
Paralleling Amplifiers Increases Output Drive. There are several circuit techniques that increase the output drive capability of an amplifier. One method uses external bipolar transistors as a push-pull circuit to provide additional drive.
Legend Monoblock 300B 2A3 Parallel SET Amplifier
https://www.ankaudiokits.com/wp-content/uploads/2019/11/Legend-300B-2A3-Parallel-SET-Monoblock-V-3.04.pdf
The Legend Monoblock 300B-2A3 Parallel Amplifier is a true high-end amplifier, a beautiful expression of single-ended amplification, reserved for the discerning audiophile. The Legend series monoblock single-ended amplifiers employ a 6SH7 driver tube — selected by Andy
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