Allright, got it back and at first it was OK. But since I was in the middle of a move I haven't been able to listen to anything else than the tuner, which was fine. Also I only hooked up two speakers.
But then, now I was able to reach for the CD player, connected it and it sounded like crap! (Mind you it was a modified Marantz). So I thought after 8 years it was fried, so I hooked up my cheap Philips Bluray player. Crap as well (connected by HDMI).
Ok then I hooked up my external DAC to the Onkyo, but sounded like crap on both line and optical.
What I mean by sounded like crap: the sound sounded oversteered by higher volumes, though I needed to turn up the volume by at least 0db output to get a reasonable volume. With heavy distortion, mind you.
Just got an email from Onkyo support to perform a factory reset (why, it is tested right?). But I will swap cables nevertheless and try....
Needless to say I am quite disappointed.
It is bizarre that my girlfriend's entry level Pioneer VSX415 which was about 200 euro's new, outlasted my former Marantz SR5600 (returned to the shop multiple times, lost track) and my Onkyo SR707.
So I will either go stereo again, or go "pro" level with seperate pre-amp and power aps. I do not mind spending some money, but it will have to LAST, at least for a decade. For the moment all I really miss is the HDMI switching because the Pioneer doesn't have it. It sounds WAY beyond expectation through my old BNS (Dutch) speakers so I can live with it for a little while.
I would be so grateful for the company who would focus on basics - good sound, power; excellent reliability for a fair price - and do not incorporate features I do not need, like mediastreaming iPod connectivity and stuff like that.