I have a 4 channel class D amplifier and a power supply for it purchased from Parts Express. It's rated 100 x 4 @ 4 ohms. I would say it easily puts out 20 x 4 into 8 with minimal distortion as this amp is ridiculously clean sounding for the price.
product links:
Sure Electronics AA-AB33182 4x100W at 4 Ohm Class D Digital Audio Amplifier Board STA508 (TK2050)
Sure Electronics PS-SP11115 24 VDC 6.5A 145W Regulated Switching Power Supply
Purchased new @ $80. It's an amazing little performer, good clean revealing sound quality and surprisingly big sound. No issues or problems.
Contact me if interested.
product links:
Sure Electronics AA-AB33182 4x100W at 4 Ohm Class D Digital Audio Amplifier Board STA508 (TK2050)
Sure Electronics PS-SP11115 24 VDC 6.5A 145W Regulated Switching Power Supply
Purchased new @ $80. It's an amazing little performer, good clean revealing sound quality and surprisingly big sound. No issues or problems.
Contact me if interested.