Proficient M3 Subwoofer Amplifier - Tested

NHT MA-1A Mono Subwoofer Amplifier w/ Bypass & Auto Shutoff Works, Clean, Nice!

Radio Shack 250-Watt Stereo PA Amplifier in Original Box

NHT MA-1A Subwoofer Amplifier Vintage Audio Equipment Tested and Working

Sonance A800 Subwoofer Amplifier in Excellent Condition

Atlantic Technology SA-180 Subwoofer Power Amplifier, Working, Great Condition.

Vintage NHT MA-1A Subwoofer Amplifier Now Hear This Inc Powers On

Kenwood KM-208 Stereo High Power Amplifier Audiophile - Working!