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http://www.bswonline.com/public/prod_item.asp?item=DSP30

Does anyone have any experience or knowledge of the DOD rackmount RTA?
Here's a typical retailer's listing for one

http://www.ambientsound.com/dod_sr_rta_series_2_analyzer_and_room_delay.htm

http://www.magdonmusic.com/pa/dod/realtimeanalyzer.htm
31 bands, $319!

That would be great for the theater with the Perspecta unit & really any PAC with per-show setups when running film. Everytime there's a new setup, processor change, or whatever, the RTA could be checked in the booth. The mic could be left in some position in the house that's effective & unnoticed.

Any help will welcome.

Sorry for my weak English !

We also have a couple of Abacus Arta 80's that are very good as well. I like the fact that it has a battery (which makes a-chaining a complex a breeze) and that it is small. We use the USL multiplexer's with these for B-chaining.

I heard a rumor once that THX was working on another analyser to replace the R2. Anyone else hear anything?

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I saw recently a tech equalizing a theater with an ARTA 80 RTA.
Don't you think that the ARTA is a bit... approximative as an RTA? 1dB approximation on the analyzer, the SPL has 1dB approx too...
This tech used the ARTA with just one mike in the auditorium. I saw also the R2 with 4 mikes, I can't believe that the same result can be obtained with an ARTA80 with one mike.

What do you think about?

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First of all, the Ivie unit is tiny and sturdy. It will display SPL and the RTA without having to "toggle" the display. On the Ivie, the A-C weighting is built-in; the AudioControl RTA needs a separate attachment.

The size of the AudioControl unit makes it difficult to set it down (securely) at eye level. It's so big...it wants to be on the floor or on a tabletop. After too much squinting and squatting, I finally resorted to saying a few "Hail Mary's" and just "hoping" that it would stay put atop the rack.

The LED's bounce around too much. I was damn-near thrown into an epileptic seizure by the display. "Fast" is waaay too fast and "Slow" is reeeeallly sloooow. "Medium" is almost okay, but I had to go so far as to switch all the way out to 4dB per step to slow it down a little.

I'm also not getting good results with the SPL meter in the AudioControl unit. After making the necessary adjustment to my Ultra-Stereo multiplexer in one auditorium, I got wildly differing results in the cinema next door. Screen channels were suddenly around 10dB too loud and surrounds were about 10dB too quiet. As a result of these bad experiences, I do not trust the AudioControl product.

Maybe those problems will go away when I get the optional A-C weighting filter but -- at this stage -- I'm ready to get rid of the thing and go for an Ivie. I don't know why they failed to include weighting filters in the 3051. It's really an unforgiveable omission, IMHO.

The Ivie IE-30 is also battery operated (or you can use an AC attachment). AudioControl sells a model 3052 which is battery operated (and also offers printouts). The instruction manual for the 3051 seems to be the same for the 3052, so I'm guessing that they are very similar in all other respects.

~Manny.

Re: ARTA accuracy. Whilst the on board LED display only (only??!) resolves to 1dB, if you hook it up to your laptop and run the supplied software you can have much finer scales.