are different sized resonators tuned to cancel different frequencies?

For instance, would any particular length resonator be optimal to attenuate the horrendous in-cab exhaust drone I have at 2500-3000 RPMs?
(Running K&N CAI, DTLTs & Magnaflow Cat-Back) Thanks!

 

Vibrant Ultra quite resonator...

http://vibrantperformance.com/catalog/index.php?cPath=1021_1033_1055

Had it welded right to the flange that connects Y-pipe to cat back. Fits perfectly and will definately remove any drone.

Got the 2.25" one in my garage no longer in use. PM me if interested...

 

That product is the front runner so far. I actually found out about it from one of your older posts in a search here. Unfortunately I need the 2.5, but thanks for the offer. Just to be sure, these pipes are measured from their OUTSIDE diameter, not inside, correct?