Vintage 1989 Yamaha AST-A10 Active Servo 70w Power Amplifier & AST-KS1 Cartridge

Yamaha AST-A10 Natural Sound Active Servo Processing Power Amplifier

Yamaha Active Servo Cartridge AST-KS1 For A10 Amplifier & AST-S1 Speakers NOS

YAMAHA AST-A90M NATURAL SOUND ACTIVE SERVO PROCESSING AMPLIFIER

Yamaha M-35 Natural Sound 2/4 Channel Power Amplifier No Remote Tested Works

Yamaha YST-A5 Stereo Power Amplifier

Yamaha SSC-100 Natural Sound Mic Stereo Amplifier - Rare - TESTED & WORKING!

Yamaha DSP-1 Natural Digital Sound Field Processor 120V 35W (NO Remote) Tested