AVS Forum Special Member
Join Date: Jun 2010
Location: Florida Suncoast
Mentioned: 8 Post(s)
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I'm not sure there is actually any problem here. Admittedly I've never used the 0-90 option... I've always used the "db down" setting. But I do know that there are some sources for which I have to turn the volume "way up"... in my case, up to -10db (i.e., closest to the 0db "maximum"). Your setting of 70 out of 90 probably isn't tremendously high.
In closing I should point out that having twice the power doesn't mean it will be twice as loud. Having a larger amp just means that the reserve power is available when the speakers demand it.
Denon AVR-4520ci, Polk LsiM703's, 704c, Rti4 surrounds, some Klipsch subs. Bedroom: Lsi9's, Onkyo TX-8050