Depends on the sensitivity of the speaker and also how the amplifier is gain staged. Yours might be gain staged properly and/or your speakers less sensitive. Usually proper gain staging is the more important of the two.
Originally Posted by AcuDefTechGuy
I have 101/db-w speakers and have only a little hiss if I put my ears right up to them. So, we should be able to find a solution to your problem. Let's troubleshoot...
Make sure the levels out of the receiver are hot (not clipping, but, you should be watching a movie where 0 is reference level - audioholics has howtos on how to set this up). Your amp is fixed gain, so, that will allow you to turn the input attentuators down and reduce the noise of the amplifier. Since you are not powering all your speakers off similar amps, you likely will have to adjust levels a bit in the receiver. Don't worry, lowering the input attentuators does not prevent the amp from reaching full power.
H/T: JTR T8 LCRs, M&K S150 surrounds, Danley CS30 subs, Onkyo Professional pre-pro, dbX dsp, Crest & Crown Amps, Epson Pro projector, Auralex & GIK treatments (Sources: WD Live, PS3, Technics 1200, AppleTV)
2.1 Studio: Bag End PM6s & Infra Pro 12", Focusrite AD-DA, Beyerdynamic DT770s, Auralex & GIK treatments (Sources: MacBook Pro 15" Retna w/ Adobe Production Suite & Cubase)