When testing out my ADA1000-3, connected to the pre-outs on my Denon 4500H, I could detect a very quiet hiss when no content was playing (when my ear was within a foot of the speakers).

Just curious if others have noticed this is well with their ADA's, or if my Denon 4500H is the cuplrit (weaker pre-outs and dirtier signal path vs. a proper pre-pro).

If attributable to the ADA, would the ADA1250 and ADA1500 be quieter than the ADA1000 in this regard, or would they exhibit the same quiet hiss?
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Axiom M5HP,VP180,M3,ADA1000
Anthem MRX 720
SVS SB-3000 (dual)