Absolute top tier DAC for standard res Redbook CD

I have also been advised by a room design guy to consider this:

http://www.bagend.com/products-category/active-bass-trap/

It's a Bagend active Base Trap.

"it looks like a small subwoofer without input termi- nals. Fore and aft are two small micro- phones; either one can supply the input to, effectively, two single-band paramet- ric filters (range 20–65Hz) that add tar- geted resonance peaks to the feedback circuitry that powers the driver. As a result, the input signal at those peaks is amplified and output via the 10” driver but, cleverly, opposite in phase to that of the input. Place the E-Trap in a high- pressure zone, such as the junction of two or three room boundaries, and its output will oppose and cancel the nodal energy in the room"

If the room is over pressurized, how does adding more pressure solve the problem? I'd look at taking the room out of the equation, as well as the crossovers. I have not ever heard box speakers sound good in a small room. Matt, try external crossovers - that will really open up your world of choices for time & phase coherent accuracy as you'd be doing it yourself. You need to take control, brother. This will consume you.

Not over-pressurized. Just pressure imbalance.

Don't know. But it's worth a try....

I don't have the fund of knowledge to start tuning my own external crossovers. But thanks for the complement and the idea.

Don't get me wrong guys. My room is awesome. But I have a few issues that, once under control, will really make that last little bit shine. Isn't that what we are all after, the last 1/10 of 1%?

Hmmm, "Fixing" acoustic anomalies by applying subwoofers out of phase to perform destructive low band-pass interference... Fascinating... Sounds like fighting a fire with... Well, fire.

Might work to a point. Yet, I am skeptical about the long term appeal of the end product... Seems a one-way route down an endless audiophrenic rabbit-hole.

G.

06-20-15: Mattnshilp
...he suggested I add a sub to the room connected in series from the amps to speakers (high output terminals). He specifically said not to pull the signal low level from the pre-amp. He said to put the sub behind the listening position in the back of the room to balance the pressure in the room, adjusting the output so its not even audible but enough to offset the main speakers output pressurization.

Matt,

As far as placing a sub in the rear of the room is concerned, it seems worth trying but the concern would be that arrival time differences at the listening position, between the mains and the sub, may compromise coherence unacceptably. And if you set the sub's volume low enough to prevent that, you may find that it is ineffective with respect to its intended purpose.

Also, regarding the reference to "series" connection (which strictly speaking is a misnomer, as from a technical standpoint the sub and mains would be connected in parallel): Assuming the amps are in the front of the room, as you most likely realize it would be best to connect the amps directly to the main speakers, and to run separate connections from either the main speakers or the amp to the sub. Also, as you probably realize, if the sub is a powered one the cables to it would not have to be heavy gauge (even 22 gauge or smaller would work fine) since powered subs have high input impedances (e.g. 10K or more), and hence draw very little current.

Regarding the BagEnd product, if you haven't already seen it you will want to check out Kal Rubinson's review. Also, you may want to look into the Spatial Black Hole. I have no experience with or particular knowledge of either product.

Good luck. Regards,
-- Al