Harman Kardon is mid range audio - probably good value for the money but not the high end (I had HK receiver once).
Harman Kardon belongs to Harman International Industries that also owns JBL, Infinity, Revel and Epicure loudspeakers, as well as professional audio systems with such brands as JBL Professional, UREI, Soundcraft, Allen & Heath, Studer, DOD, Lexicon, AKG, BSS, Orban, DBX, Quested and Turbosound.
Harman Kardon belongs to Harman International Industries that also owns JBL, Infinity, Revel and Epicure loudspeakers, as well as professional audio systems with such brands as JBL Professional, UREI, Soundcraft, Allen & Heath, Studer, DOD, Lexicon, AKG, BSS, Orban, DBX, Quested and Turbosound.