[OBF]

Hi.  Does anyone know if room EQ systems like TacT, Trinnov, Anthem ARC, Lexicon, PC-based, etc... function the same with different types of sound dispersion?  Not sure if I phrased that right, but basically since most speakers are point source, I wonder if these are designed to "expect" point source radiation and if something like an open baffle would confuse it, or if that is a non issue?

[logician]

Its a non issue in my experience. My OBs have worked well with any of the well known EQ systems. They work even better with active drive.

[OBF]

Thanks, that is good to hear!

[SAC]

I have wanted to ask this for a while.  I know audyssey does well with my stereo open baffles and an audyssey spokesperson claimed it was a non-issue.

However, I do remember someone, I think Linkwitz, explaining that equalisers would not work optimally as you theorised, since the backwave confuses the measurements.  This could relate to how Linkwitz takes measurements very close to the speakers and preferrably outside to perform his measurements.

Makes me wonder if I should equalise my open baffles from the listening position as audyssey suggests or in closer proximity to the speakers in the middle of he room where the backwave will interfere less.

[gainphile2]

Hello, I did a few experiments, and it did not work optimally.

http://www.diyaudio.com/forums/showthread.php?s=&threadid=148294

See post #5 and forward on midrange EQ.

[logician]

My best results so far were obtained from a multichannel active crossover system using fairly long FIR filters with unrestricted Group Delay Correction.

All swept sine measurements were made from the listening position. This way the back-wave seemed better integrated and the the bass was also preferable. Midrange performance was generally excellent and fine grain tuning adjustments made through very slightly different target curve settings were clearly audible.

It may well be beneficial if the measurement and filter generation modules have some capability to compensate, at least in part, for first reflection effects.

Given an otherwise constant playback level it is interesting to note just how sensitive the ear is to even fractional db moderately wideband variations.

Dipole speaker placement which avoids parallel wall alignment also seems to help.

[Telstar]

A friend of mine has used DRC with his computer source for equalization and it worked flawlessly.

[Bob in St. Louis]

Soon I'll be using the DCX to go full active and quad amped with all six available outputs;
- 2 for tweeters in OB coax
- 2 for midwoofers in OB coax
- 1 for mono bass OB augmenters
- 1 for IB sub
Everything remotely operated through the RS-232 cable to the PC.
Should be fun.  aa

Bob

[Ciucchino]

A friend of mine has used DRC with his computer source ... it worked flawlessly.

THX 

[sfdoddsy]

I've had good results using the PEQ in the Behringer DCX, but less positive ones using Audyssey.

Audyssey does odd things to the bass in my system, especially when using it in conjunction with crossing over to a sub.