Rives Audio PARC

What is your goal? If it is general EQ and room matching, physical treatments are always preferred but, admittedly, they can be extremely large for bass modes.

Assuming you have only 2 active speakers (no subs), you would be best served with room treatments for everything above the bass and EQ only for the bass but this is difficult to implement in an all-analog system. The PARC will be a big help (http://www.stereophile.com/roomtreatments/883/index.html) but there are much more effective digital options these days.

PARC is analog. IMHO better than digital options.

I have 18 Gik acoustic devices and i do have a pro company building true bass absorbers. They work and you can set them at a specidfic frequency. But again, very large and very heavy. A PARC is small and i can use it with ease. Question is, what are the downsides?

The limitations of PARC are the restriction to 3 bands of EQ and the inability to boost non-modal troughs in the FR. It also lacks bass management/crossover functions which are necessary for many 2 channel analog systems.

As for "PARC is analog. IMHO better than digital options," I consider that as faulty as are most gross generalizations.

Kal