SAX-100.4 V2 - Sundown Audio 4-Channel 800W RMS Amplifier SAX-100.4 V2 - Sundown Audio 4-Channel 600W RMS Amplifier Full range Class A/B 4 channel amplifier High Quality 4channel Stable into 2 ohm stereo or 4 ohm mono Dimensions: 8.25"(W) x 2.32"(H) x 18.5"(L)