Resolution Audio Opus 21 questions

Greetings all! I have a RAO 21, and am a little un-happy with volume(loudness), dynamics/slam. Using modified Odyssey Stratos Mono amps, Odyssey Lorelei speakers, VD Revelation speaker cables & TG Audio i/c, Electraglide SOTU p/c's. My question: Is anyone using a pre-amp with the Opus 21? Does it/will it help in the above mentioned categories.
Thanks for your help.
Thanks to everyone who responded including email responses. I greatly appreciate the sharing of your time and experience. Seems that there are 2 distinct sides to this one...since I've already tried the direct route I will give the pre- a shot. Thanks, again.

Please read my post again.

Here is what I wrote: (The DIN output bypasses the volume control, and is the absolute best way to get the best sound from this unit, as per Jeff Kalt, the owner of Resolution Audio.)

Where in that sentence to you see anything about using a preamp?
Oh I guess I thought you meant the DIN goes into a is the volume set without a preamp if you bypass the units control?
I must confess I'm confused as well; I read the sentence as the DIN output bypassing the attenuator circuitry on the Opus 21, allowing the signal to pass more directly to a preamp.
Where in that sentence to you see anything about using a preamp?

I think its the prior sentence, wherein you said you're running the Opus into an Ayre preamp that's leading to the confusion.