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JBL: SA660 amplifier a few images. How many are still in daily use, rather than in collectors' cabinets? - Audiophile News & Music Review
Pictures and images JBL SA-660 - Audiofanzine
1969 JBL SA660 Lansing Stereo Solid State SA600 Power Amplifier Black Hammertone & Walnut Cabinet Vintage HiFi Sound System Amp for Home Stereo | Reverb
JBL SA660 solid state integrated stereo amplifier Photo #3375598 - US Audio Mart
JBL SA660 & ST860
JBL SA-660 SCH Service Manual download, schematics, eeprom, repair info for electronics experts