I just replaced a nr1403 with an sr6012 and I am now experiencing a hiss coming from my tweeters, which from what I understand is caused by the 'floor noise' of the amp and is considered 'normal'.
I already verified the following:
- hiss is present, even without any hdmi input/output sources connected to the amp
- hiss is present on all satellite/surround speakers
- hiss is present when hooking up a one different speaker, but also leaving all the other speakers still connected
- hiss volume does not change by increasing/lowering the amp volume
My speakers are harman kardon hkts20, which according to the spec are 8 ohms: SPL @ 1 watt/meter: 86dB
I heard the hiss the first night after replacing the amp while sitting at my normal sitting position which is about 1,8m from my surrounds and 2,5m from my fronts.
During the day with more ambient noise I can only hear it when I put my ear at about 0,5m in the path of the tweeter. But now I known it's there, it's difficult to 'unhear' it.
Does anybody who owns the sr6012 has a similar hiss?
Is there any steps that can be taken to 'reduce/remove' the hiss?
Cabling wise, my setup is still a bit of a mess. I haven't removed excess speaker wire and they form a bit of a mess behind the amp, bunched together with some power cables of the amp/tv receiver/media player.
If nothing can be done I guess I just have to accept it or return the amp in the next 2 weeks.