Right,
There is an audio waveform comes from a TV (Vpp is 230mv) and goes to two separate stereo amplifiers.
As I mentioned and you kindly help me to find the phase-shift is 126 degree "IN SPEAKER OUT" compare to each other.
The issue is to make this two in same phase. So I think I need a phase-shifter circuit for at least one of them it means , one amplifier will directly connect from TV and other one will give the signal from the "phase-shifter circuit" and with a potentiometer I would make them is same phase.
The reason of this is:
I had 4 channel amplifier before and I don't have it now ( have to replaced with 2 amps) before that I feel the bass of musics really sync , clear and amazing ( I can not tell it by words) but with new system I feel bass has cut or weak or distortion and it is not good at all.
Regards