You must fix your amplifier or buy a new one.
My stereo amplifier produces 70W RMS into 8 ohms or 120W into 4 ohms per channel at 0.05% distortion. I use two speakers in parallel (front and back) for each channel. The distortion is so low that it cannot be heard. About 30 years ago I had surround sound but not now.
I never operate the amplifier at full blast so it never clips.
My amplifier was not designed and not made in China.