ADA Audio Design Associates PTM-850 Multi-Channel Power Amplifier tested

Audio Design Associates PTM-650 6 Channel 3 Zone Premium Power Amplifier ADA

Audio Design Associates PTM-650 6 Channel Amplifier

Ada Audio Design Associates PTM-8100 8 Channel Power Amplifier [Tested]

Audio Design Associates ADA PF-200 POWER AMPLIFIER

Audio Design Associates PTM-650 6 Channel Amplifier Works Great

Vintage Audio Design Associates ADA PT-200 Dual Channel Power Triangle Amplifier

Audio Design Associates ADA PF-201 POWER AMPLIFIER