Any manufacturer will emphasise the best points of his products and play down the comparatively weaker areas and I assumed that is why the 4430 directivity was included but not the 4435.
No disrespect to the JBL speaker team. I have a JBL 2245 + 2226 + 2447 + 2405 system with current project a 2453 + ? centre and 2433 + ? surrounds.
So my opinion should be obvious
If you contributed to any of these then it is a pleasure to be able to thank you personally.
Best wishes
David
I started this thread a few years ago.
I finally finished installing JBL DMS-1 monitor, WTW Horn system like Kinoshita Monitor or K2, but 2x14" woofers are much closer each other. I tested a lot of different crossover methods, and I found Keele Linear Phase method (Linkwitz Lab) at 600Hz sounds the best, compared to any other non linear phase filter method we tested. We all can clearly hear the annoying phase shift with analog style non linear crossover in blind tests performed here. It was almost too easy to detect. Slight pre ringing is visible in the step response, of course, but I honestly can't hear it. One person says he does, but he also prefers LP. Measured response is unusually clean both vertical and horizontal.
I have Barefoot MM27 MTM monitor here, and DMS-1 is a way better speaker to "listen to" or "enjoy" the music, and it is still more accurate than Barefoot in some aspects.
I finally finished installing JBL DMS-1 monitor, WTW Horn system like Kinoshita Monitor or K2, but 2x14" woofers are much closer each other. I tested a lot of different crossover methods, and I found Keele Linear Phase method (Linkwitz Lab) at 600Hz sounds the best, compared to any other non linear phase filter method we tested. We all can clearly hear the annoying phase shift with analog style non linear crossover in blind tests performed here. It was almost too easy to detect. Slight pre ringing is visible in the step response, of course, but I honestly can't hear it. One person says he does, but he also prefers LP. Measured response is unusually clean both vertical and horizontal.
I have Barefoot MM27 MTM monitor here, and DMS-1 is a way better speaker to "listen to" or "enjoy" the music, and it is still more accurate than Barefoot in some aspects.
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Measurement result was uploaded to Audioheritage site. Measured at about 105 dB.
Loos too spaltan, zero WAF.
JBL DMS-1 Experience and Measurement
Amplifier
http://www.diyaudio.com/forums/pass-labs/241729-aleph-j-illustrated-build-guide-174.html#post4641691
Loos too spaltan, zero WAF.
JBL DMS-1 Experience and Measurement
Amplifier
http://www.diyaudio.com/forums/pass-labs/241729-aleph-j-illustrated-build-guide-174.html#post4641691
Attachments
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Nice to read that you are pleased with the outcome, and to see your results.
My previously expressed concerns about the WHW layout may be a bit alleviated by current improvements in FIR filters.
I don't think I had read Don Keele's Linear Phase paper when I made my comments.
I still have a few doubts about off axis behavior, vertical polars.
Was your test done with a UMIK-1 or ?
Best wishes
David
Dayton EMM-6.
I understand your doubt about the vertical response of WTW. Vertical response is mostly limited by tweeter (horn) design itself, so it can't be improved by FIR linear phase. Also with large units like this, the crossover frq has to be low, so top frq has to be compromised. It's not for someone who want to see very flat response over 10K. In the future, I would love to try alternative arrangement with center mid+tweeter W(MT)W instead of one center horn, like this new MM26 monitor from Barefoot. Does it look reasonable for you?
Barefoot Sound MicroMain26
FIR filter had somewhat steep learning curve, because FIR specific parameter such as window function, impulse length, FIR type, all affect the the transient / sound stage a lot. DMG is probably the only digital filter that can be edited those parameters individually, so it was a great learning tool for me. Really bad thing about FIR is it requires extreme processing power, 2.5GHz i7 quad even can't handle the longest impulse whatever the latency is...
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