digital eq/room correction trade-offs


I am very confused about digital room correction.

For many years, it seemed the common wisdom was to have as clean a signal path as possible, with as little processing and as few conversions as possible: use a high quality DAC to get the signal to analog and then a pure pre-amp/amp to speakers.

But it now seems that many would argue that the benefits of digital eq are such that even an extra analog-digital-analog step is worth it for the benefits of digital room eq.

So, for example, I enjoy listening to CDs and SACDs using my Bel Canto PL-1A. I go analog out to my pre-amp. Is it worth it to contemplate the extra step of analog to digital for room EQ and then back to analog to the pre? I find it hard to believe that any benefits of the room EQ won't be substantially offset by the additional conversions.

Your thoughts most appreciated. Let's assume for the sake of this discussion that my room is imperfect but not horribly so (which I think is accurate).
dgaylin

Showing 3 responses by rodman99999

I was a straight-wire-with-gain guy(using a modded Dahlquist DQLP-1 to bi-amp my system) for 25 years. My last attenuator was a Placette Passive Linestage. I eschewed any signal manipulation, analog or digital, until reading some reviews about the TacT RCS products/algorhithms. If the(pickier than I) live-music-listeners at TAS thought it was transparent, I figured I'd try one(the 2.2X). Now I couldn't live without it. Replacing it's power supply with the MauiMods FRED/Sanyo OSCON unit took everything(system-wide) to an even more dynamic, controlled and transparent level. A TacT RCS would replace your present pre, with fully differential and single-ended inputs/outputs. If your CDP has digital output: you could feed the pre directly from it's transport, eliminating the CDP's DAC. Unless you rode the "short bus" to school: set up and operation are a piece of cake. If you go TacT, there's no going back!
My BAT VK-D5 has a tubed output stage(fully differential) that I've stuffed with six pre '68, NOS Siemens CCa's(wonderful, lifelike reproduction). It's digital out is a BNC connector. I've not tried the BNC to my TacT for lack of a suitable interconnect. I'm not disposed to spend the kind of money for a test cable to equal the Kimber KS-1130's I'm using(for a valid comparison). Yes- I am using the TacT as a preamp and active bi-amp crossover, feeding analog signal to my amps. That's the intended purpose of the RCS 2.2X with DACs at all the outputs. TacT does offer a unit without bi-amp capability(http://www.tactlab.com/Products/RCS20/index.html) That will still do time domain correction, parametric EQ, etc. As mentioned by Richards: Experiencing it in your own system is the only way to gauge your benefit. I do believe you'd find it enlightening. If you were able to audition one with a MauiMod power supply, you might find it a revelation. One might call me a VERY satisfied customer of both companies. =8^)
Here are some opinions from people that have ACTUAL EXPERIENCE with the TacT RCS system. I've only included the RCS 2.0, as you've not mentioned any desire to actively bi-amp. Note the dates, and that many improvements have been made by Boz since these were published.(http://www.stereophile.com/amplificationreviews/437/index2.html) (http://www.audioreview.com/mfr/tact/others/rcs-room-correction-system/PRD_118079_1590crx.aspx) (http://stereotimes.com/acc110299.shtml)