Now This is a sub! Bertha...W bin - Page 2 - diyAudio
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Old 7th May 2011, 08:14 PM   #11
pgolde is offline pgolde  United States
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@ m R g S r search him on prosoundweb.com he held a few sub shootouts, he was (is) a McCauley and a Bassmaxx dealer
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Old 13th May 2011, 06:09 AM   #12
Thawach is offline Thawach  Thailand
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friends do u hv the plan on this pic? i like the butterfly boxes in red line. if i design by myself. i think about 2013 will finish. thanks for high in advince
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Old 13th May 2011, 03:16 PM   #13
epa is offline epa  Netherlands
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Quote:
Originally Posted by Thawach View Post
friends do u hv the plan on this pic? i like the butterfly boxes in red line. if i design by myself. i think about 2013 will finish. thanks for high in advince
the are rear loaded low mids.
seems a bit odd to use rear loaded for lowmids.
i suggest to use fronloaded for lowmids.
imo
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Old 13th May 2011, 04:07 PM   #14
wg_ski is offline wg_ski  United States
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Quote:
Originally Posted by epa View Post
the are rear loaded low mids.
seems a bit odd to use rear loaded for lowmids.
i suggest to use fronloaded for lowmids.
imo
They're doing that so the mid can cover an extended range - like the single-driver folks like to do for hi-fi. Front loaders will work better if you use a separate high and low mid (the low can be folded). This of course gets rid of all the phase cancellation problems you can get with rear loaders.
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Old 15th May 2011, 09:06 AM   #15
Thawach is offline Thawach  Thailand
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ihv just known tu has many friends are betterLOL thx 4 2. i loved buffterfly bin because it was beautiful. ok if Flh is beter ill change to it. but see on Elephant mouth w-bin ok beautiful as the same but very big. and i'm afraid of the phase problem when use together with the other low bin.thx again
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Old 12th October 2011, 07:08 PM   #16
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I was looking for something like this last year before I made the Pyroboxs.
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Old 12th October 2011, 07:15 PM   #17
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Ehh...they're not really portable at all. Pretty much install only. Would be a hugeee pain to move Around.
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Old 26th June 2012, 09:12 PM   #18
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Default Original RLA Bertha JBL4550A's all vintage loaded

Hi. I have come across a huge original RLA Bertha subwoofer. Also there are 4 JBL 4550a's. They have JBL speakers model: 2225H. Consecutive serial numbers on the one I opened up. Putting up for sale/trade. My email is Ldawns@msn.com . Thanks
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Old 26th June 2012, 10:07 PM   #19
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So it's just the Bertha without the mouth extension?
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Old 27th June 2012, 01:01 AM   #20
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I just recently obtained these and am not knowledgeable about them, other than what I have researched. When you mentioned mouth extension, I looked up what it meant. That's how ignorant I am about these. But I did find there are a lot of "old school'ers" that prefer them. I see ads for the cabinets but without speakers. These all have speakers in them. They are JBL 2225H's. The one speaker I took the back off of had 2 with consecutive serial numbers. But I'm learning more every day.
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