Heayzoki 4 Channel Stereo Headphone Amplifier

AKG HP4E - 4-channel

Generic Wireless Amplifier Board - 2.1 Channel

Fosi Audio BT20A - Class D 2 Channel 200W

SMSL A12 - Class D 2 Channel 80Wx2

Donner MAMP5 - 4 Channel 440W

Alpine R2-A60F - 4-Channel 150W x 4

AIYIMA A07 MAX - Class D 2 Channel 300W*2

Fosi Audio TDA7498E - Class D 2 Channel 160W x2

Herdio 4-Channel Amplifier - 200W

Sony XMGS4 - Class AB 4/3/2 Channel 70W x 4 CEA 2006 RMS @ 4 Ohms