![Harman / Kardon HK 680 Operating Instructions | Integrated Amplifiers | Harman / Kardon | Manuals | Hifi Literature | Spring Air Harman / Kardon HK 680 Operating Instructions | Integrated Amplifiers | Harman / Kardon | Manuals | Hifi Literature | Spring Air](https://www.springair.de/media/image/23/b6/b2/l1553-0-l1553_600x600.jpg)
Harman / Kardon HK 680 Operating Instructions | Integrated Amplifiers | Harman / Kardon | Manuals | Hifi Literature | Spring Air
![Joining the club with a cheap setup. Infinity Reference 60s, refoamed and reconditioned crossovers. Hooked up to newly acquired Harman Kardon HK680. The Technics CH900 is my old system, still using it Joining the club with a cheap setup. Infinity Reference 60s, refoamed and reconditioned crossovers. Hooked up to newly acquired Harman Kardon HK680. The Technics CH900 is my old system, still using it](https://i.redd.it/joining-the-club-with-a-cheap-setup-infinity-reference-60s-v0-65aq1zavb9m81.jpg?width=4032&format=pjpg&auto=webp&s=ffbf905bdebca0575ec1707bd775a361445a3ca2)
Joining the club with a cheap setup. Infinity Reference 60s, refoamed and reconditioned crossovers. Hooked up to newly acquired Harman Kardon HK680. The Technics CH900 is my old system, still using it
HARMAN KARDON HK-680 amplifier - mint, with remote, manual and original box EUR 319,42 - PicClick FR
![Harman Kardon HK680 schematic detail left power amps stages marked | amps, detail, harman, harmankardonhk680schematicdetail, hk680, kardon, left, marked, power, schematic, stages | hifi-forum.de Bildergalerie Harman Kardon HK680 schematic detail left power amps stages marked | amps, detail, harman, harmankardonhk680schematicdetail, hk680, kardon, left, marked, power, schematic, stages | hifi-forum.de Bildergalerie](http://bilder.hifi-forum.de/max/588660/harman-kardon-hk680-schematic-detail-left-power-amps-stages-marked_1034217.png)
Harman Kardon HK680 schematic detail left power amps stages marked | amps, detail, harman, harmankardonhk680schematicdetail, hk680, kardon, left, marked, power, schematic, stages | hifi-forum.de Bildergalerie
![Винтажная аудиотехника Hi-Fi и виниловые пластинки LP •: Harman Kardon HK680 - топовая модель усилителя Винтажная аудиотехника Hi-Fi и виниловые пластинки LP •: Harman Kardon HK680 - топовая модель усилителя](https://3.bp.blogspot.com/-rck3edUKf-8/U3yLnmlhoHI/AAAAAAAACwI/5WuZ332X6kU/w1200-h630-p-k-no-nu/HK+680+_+03.jpg)