Antimode 8033 - Page 15

Originally Posted by BeeMan458 

If you click on the AudiogoN forum link, at the top of the table, in the preamble, can be found this comment:

" Keep in mind that these corrections are only valid under the following conditions. The meter must be set to C weighting, using 1/3 octave pink noise (easily available from various CDs), with the mic pointed at the speaker."

Hopefully this comment answers your question. Personally, I'm not worried too much by a dB or three of error but I am worried sufficiently that when I have the spare change, I'd like to buy the sound meter package I linked to. Until then, I'm good with what ever shows on my sound meter screen.

-

Originally Posted by Skylinestar 

Thanks for the "preamble".

Originally Posted by jdlynch 

It's more a question of the best route to take my system from its present state.

It's almost time to retire my 15 year old Lexicon DC-1. I have a couple options: stay with Lexicon (and use an anti-mode device) or move to a pre/pro that includes Audyssey XT32 and have it all in one box.

I really have become accustomed to the Lexicon sound and fear, even though it is aged, that I will not be as happy with the surround processing of any other manufacturer that supports Audyssey. The Denon AVP sounds like something I would like to try, but, it is at a price that is out of my budget.

I am leaning towards a used Lexicon MC-8 + an automatic Bass EQ device like the Anti-Mode. I don't have the interest or time to purchase and learn how to use measurement equipment and manually EQ my bass.

BTW; Thanks to all who have supported this thread. It has provided me with a lot of reading material and useful information to help me with my decision.

Originally Posted by bsoko2 

With the Rat Shack spl meter, speakers calibrate at 75 DB and subs at 72-73 DB.

Originally Posted by Pres2play 

Took the plunge and ordered 8033S-2 direct from VLSI for 349 EUR ($472 USD). Hope it's worth it, that's a lot of dough for a such a small box.

Originally Posted by BeeMan458 

I have the Anti-ModeS II and you won't get the best out of the Anti-Mode unit if your subs are not properly dialed into your room's acoustics

Originally Posted by Pres2play 

BeeMan, I'd like to install REW on my computer so I can see the frequency response with AntiMode, but I don't want to run cables from the PC to my preamp or sub to generate the required test signals. Can't I just play the Subwoofer Sweep Test from a calibration disc and fore-go the cables?

Also, I want to use my RS SPL meter for the test. Now, I've heard a lot on this site and others about mic calibration and the Shack meter also needing some correction. Is this something anyone can do?

I plan to test the AntiMode right away with the "The Dark Knight Rises," Blu-ray disc. The bass in the opening scene is quite a challenge for the subs in my room. If AntiMode can tame standing waves as advertised, I should hear a big improvement in my setup during this scene.

Originally Posted by Skylinestar 

I'm sure many people are not able to place their subwoofers at the perfect spot due to WAF issue. That's why we need Antimode. It's better than nothing.

Originally Posted by Pres2play 

BeeMan, I'd like to install REW on my computer so I can see the frequency response with AntiMode, but I don't want to run cables from the PC to my preamp or sub to generate the required test signals. Can't I just play the Subwoofer Sweep Test from a calibration disc and fore-go the cables?

Also, I want to use my RS SPL meter for the test. Now, I've heard a lot on this site and others about mic calibration and the Shack meter also needing some correction. Is this something anyone can do?

I plan to test the AntiMode right away with the "The Dark Knight Rises," Blu-ray disc. The bass in the opening scene is quite a challenge for the subs in my room. If AntiMode can tame standing waves as advertised, I should hear a big improvement in my setup during this scene.

Originally Posted by Skylinestar 

I'm sure many people are not able to place their subwoofers at the perfect spot due to WAF issue. That's why we need Antimode. It's better than nothing.

Originally Posted by BeeMan458 


Yes, the WAF is a powerful force indeed. As I type these words this force is all around me.

-

Originally Posted by BeeMan458 

I don't know. If doing a real time analysis (RTA), you're fine. But part of the REW measurement phase includes playing an included sweep so everything is automatically integrated; playing sweep/recording sweep/analyzing results of recorded sweep/graphing results of everything else that came before/additional graphing capability. The point, REW is comprehensive with what it does with the recorded information. In my opinion, one is seriously shortchanging REW by trying to change what REW does. Why the resistance to running the cables? If like the rest of us, with WAF towards cables, we set up, do our sweeps, break the system down, give the wife time to get over it and repeat. What good's a relationship that doesn't have good old fashion dynamics in it?

If you can connect the RS sound meter to your system, there's no reason you can't use it. From reading about specifications for other sound meters, other then it's frequency limited to, I think 31.5Hz, it will do fine. Below is more information on the matter.

http://forum.blu-ray.com/showthread.php?t=38765

"Weighting: The weighting affects how sensitive the microphone will be over a given frequency range. It lets you choose between Weighted A and C measurements. “A-Weighting” reduces the frequency response of the SPL meter to the 500Hz - 10,000Hz range, where human ears are more sensitive, while the “C-Weighting” will make the meter respond to the frequency range from 32Hz to 10,000Hz. For Home Theater use, the wider C-Weighting is recommended."

Obviously, we need to be able to measure will below this limit. Hence the need for a recording microphone with better capabilities.
I don't know if I can say that it will tame standing waves as our room has naturally occurring standing waves and there's nothing Anti-Mode can do to correct for this waves. You won't become aware of these naturally occurring standing waves until you get REW up and running.

.....................................................................
Yes, the WAF is a powerful force indeed. As I type these words this force is all around me.

Forgive me for my insistence but from personal experience, if the subs are not properly integrated, the Anti-Mode is not worth the price. As an owner and fan of Anti-Mode, I'd rather someone acquire room analyzing capabilities/skllis first and do the best they can integrating their subs into their room's acoustics. This includes familiarizing themselves with getting the best out of parametric settings; phase, LPF settings on both the sub and the AVR, gain controls in the AVR and on the Sub, placement issues as a foot or two will make major differences. One should learn about how acoustical room measurements benefits by using asymmetrical settings and one needs to take their time to explore time domain issues. After doing this, one will gain the most benefit from their Anti-Mode. See the Anti-Mode unit as polish and if seen in this light, one will get the best out of their subwoofer system. If done the other way around where the Anti-mode is installed without aid of a room analyzing program and room integration efforts, my opinion, they've thrown their money away and more often then not, will be disappointed in the results Anti-Mode provides.

Those are my honest, personal feelings on the matter based on personal efforts. If someone thinks I'm wrong in my above, then I encourage them to ignore my above, buy and install a Anti-Mode unit in their sonic chain and I hope they'll have a nice subwoofer based life.

My plans are, after I finish exploring the DSPeaker, Anti-Mode, to explore the MiniDSP and it's ability to integrate with REW. Personally, I'm not convinced that Anti-Mode is giving me the best my system has to offer.

-

Originally Posted by Alan P 

In order for REW to work correctly and for you to trust your measurements, you must calibrate it to your system and use the sweep it generates - no way around this with REW. If don't want to run cables, there's always OmniMic.

The Rat Shack meter will do OK as a mic (I've used mine), but can't be trusted on the extreme low or high end of the sweep. There is a generic calibration file for it available on the REW forum.

Originally Posted by BeeMan458 


I don't know if I can say that it will tame standing waves as our room has naturally occurring standing waves and there's nothing Anti-Mode can do to correct for this waves. You won't become aware of these naturally occurring standing waves until you get REW up and running.
-

Originally Posted by Pres2play 

Thanks, Alan. Would you say REW is similar to working with SMS-1?

Originally Posted by Pres2play 

It's not the cables, per say. It's pulling out the equipment from the cabinet. Just too much work. But I have downloaded the manual and started reading. Who knows, maybe one Saturday when I'm off....

Originally Posted by Pres2play 

It's not the cables, per say. It's pulling out the equipment from the cabinet. Just too much work.

Originally Posted by Pres2play 

I thought one of the benefits of the Antimode over the Velodyne SMS-1, was its ability make corrections in the Time Domain, and hence treat room modes.

Originally Posted by BeeMan458 


Can't say about the SMS-1 but my understanding of the Anti-Mode is, it doesn't do time domain. Reading from the Anti-Mode manual, there is some time that can be added but not needed to compensate for processing delay of about three feet or 3ms but no time domain correction.

Originally Posted by BeeMan458 

An anecdote. I had a service truck when in business years ago. I'm now retired. I burned up clutches like there was no tomorrow. I got the tools, back up pressure plate, disk and fly wheel. In the end, I was so proficient at pulling this system, I could have the fly wheel on the ground in twenty minutes. Since all needed gear was on hand, after a short break, everything was put back in, up and running inside of two hours. As I traveled, I had the pressure plate and flywheel turned/rebuilt and purchased a new disk so the next time things needed to be replaced, it was once again, nothing more than a two hour session and done.

The point, the first couple of times, yes, it's a pain but after awhile, you'll be so proficient, you'll have things up and running inside of twenty minutes.

Originally Posted by BeeMan458 

Can't say about the SMS-1 but my understanding of the Anti-Mode is, it doesn't do time domain. Reading from the Anti-Mode manual, there is some time that can be added but not needed to compensate for processing delay of about three feet or 3ms but no time domain correction.

The Golden Ear awarded Anti-Mode™ technology eliminates the resonances of the speaker and the room by equalizing both amplitude and time domain responses using very accurate digital signal processing filter structures and anti-phasing technology.

Originally Posted by Pres2play 

I received confirmation my order has shipped. Nice:D

Originally Posted by Pres2play 

^^^

Good to know. Thanks.

I will have to re-read the SMS-1 manual and see where time parameters is discussed.

Originally Posted by Skylinestar 

Antimode does time-domain correction.

ttp://www.dspeaker.com/en/products/anti-mode-8033.shtml