Harman Kardon PM660 Under the Knife! | Did a full recap, cha… | Flickr
Harman-Kardon PM660 - Le forum Audiovintage
Amplificateur Harman Kardon PM650 high current | Vintage Note | Hi-Fi vintage pas cher en Belgique
Doz' Blog: Harman Kardon PM660
Lefson Repair - HARMAN KARDON - PM660 - Nice vintage integrated amplifier. It's fitted with a dual (L+R) symmetrical DC power supply. Fully restored and calibrated. We've replaced more than 50 components