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Old 23rd December 2012, 12:36 PM   #531
jagcabman is offline jagcabman
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Join Date: Sep 2011
Quote:
Originally Posted by Badwater View Post
This is message for Scott. I will be building the Half Chang's soon and planned to implement the BSC recommended by Martin King his MLTL 207E virtual project. The circuit is here:

FE207E Baffle Step with 6 ohm resistance

Is baffle step necessary for this design? The speakers will be SS driven.

Thanks for all the help and a great design.

Bill
I would also like the plans for this but everytime i try the link i get handbag websites, i think it has been hijacked, could we try again please or just post a link without linking if you see what i mean? regards, Nick
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Old 9th November 2017, 05:30 PM   #532
AmadeusMozart is offline AmadeusMozart  New Zealand
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Join Date: Oct 2009
Location: New Zealand
Quote:
Originally Posted by Bob Brines View Post
[rant]

The whole reason for the big double BVR's like Chang is to get a "big" sound that is generally lacking in single driver speakers. It's not bass that is lacking, but the grunt frequencies -- 60-100Hz -- where the 6-8"ers run out of excursion. Why one would expect to get useful results out of a 3-5" driver is beyond me. No Sd means no air movement.

I'm still trying to find a cabinet for FE127E's. Yep, I get bass to 60Hz -- at 60 dB @ 1m, but I can't get 80dB average at 2m without horrendous distortion. And I'm talking baroque music where the biggest instrument is a theorbo. Sure, huge horns would probably work, as might corner horns, but I don't have usable corners.

I remain steadfast in my opinion that drivers smaller than 6" are midrange drivers and need to be rolled off below 200-300Hz.

[/rant]

Bob
Respectfully disagree, a tube amplifier with the small Karlson with FE-166En (that I built many years back) gave chest thumping bass. The cone hardly moves. Kids now have them with a solid state amplifier and could not be happier (combined with enabled FE-127E for mid-high). At the moment I am listing to the FE-167E with an Audio Note push pull clone and am more than happy.

AM
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Old 10th November 2017, 03:15 AM   #533
Bob Brines is offline Bob Brines  United States
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Join Date: Jan 2003
Location: Hot Spring Village AR
Half Chang build
20 July 2008!!!!!

My opinion has not changed. I use a wide-range 4" over an 8" woofer. The bigger the wide-range, the more dispersion (lack of) problems you get.

Bob
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