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Old 27th January 2009, 10:40 AM   #21
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True enough, plus the AC OB forum that inspired it: http://www.audiocircle.com/circles/index.php?board=90.0

The Dark Star thread in particular is a plentiful resource for B200s on OBs.
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Old 27th January 2009, 10:51 AM   #22
Tea-Bag is offline Tea-Bag  United States
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Quote:
Originally posted by Scottmoose
True enough, plus the AC OB forum that inspired it: http://www.audiocircle.com/circles/index.php?board=90.0

The Dark Star thread in particular is a plentiful resource for B200s on OBs.

I am still playing with open baffles. I just put in a pair of Alpha 15a's, and amconsidering using two per channel.

Something different to consider for the lower end.

T-Bass circuit
http://www.diyaudio.com/forums/showt...25#post1622325

Also, some more open baffle ideas at -
www.quarter-wave.com
I am considering the lowther + 2 Alpha approach. (just dont have x-overs in hand)

I am starting to think an L-PAD is a must for getting bass occasionally balaned out in comparison to full range.

Mike
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Old 27th January 2009, 11:03 AM   #23
Piek is offline Piek  Europe
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Also see in this context (large baffles), another interesting point of Rudolf: http://www.audiocircle.com/circles/i...?topic=64048.0

-Micha
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Old 27th January 2009, 11:12 AM   #24
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Dave, are your efficiency ratings an average or from say 600hz -18khz? Stock units? How much of a drop in response did you see towards the bottom octaves when measured in your baffles? I'm running a T-amp so I'm trying to hang on to every db I can.
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Old 27th January 2009, 10:35 PM   #25
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Quote:
Originally posted by S.Spielbergo
are your efficiency ratings an average or from say 600hz -18khz? Stock units? How much of a drop in response did you see towards the bottom octaves when measured in your baffles? I'm running a T-amp so I'm trying to hang on to every db I can.
Efficiency is waht is spit out by the T/S calculator on stock units. You lose a bit less than a 0.5 dB when treated (but gain at least 10-15 dB downward dynamic range at the bottom).

The only efficiency that counts is the lowest efficiency in the bandwidth you are using them. I'd be happy with a nice 10ish watt PP with B200. Our 4 w SE or PP amps weren't quite enuff.

dave
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Old 28th January 2009, 12:42 AM   #26
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After some experiments I've decided to give the line level filter a chance. I'm honestly not too crazy about cutting any more holes in these baffles plus if I don't like the filter I can just disconnect it and toss it in the pile with the rest of my aborted electronic crap. I'm going to see about a filter that will only augment the top end 3db rather than 6db, these guys are pretty good they just need a little help.
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Old 28th January 2009, 04:00 PM   #27
konut is offline konut  United States
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Very interested in your findings. You might want to skim this thread for, what might be, useful info.
http://www.audiocircle.com/circles/i...seen#msg280444
I'm using passive power level compensation circuits and find they impose too much of a sonic signature. Line level is an interesting, and potentially less onerous, alternative. Please keep us informed, thanks
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Old 29th January 2009, 01:15 AM   #28
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I will be ordering some parts from digakey tonight, we'll see how it goes once they come in.
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Old 29th January 2009, 09:26 AM   #29
hm is offline hm  Europe
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Default S.Spielbergo

late, but i wonder that noone will
take a SAT horn solution with the B200,
no crossover down to ~100 Hz with ~96-98 dB
look my sats TRUMPET, SCHALMEI, HORN
with measurements and plans:

Click the image to open in full size.

Click the image to open in full size.
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Old 29th January 2009, 09:45 AM   #30
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Hello,

1.
How do you integrate with the sub around 100 hertz ?

Is there a need for a crossover ?

2.
What's the best or the acceptable solution for the bass module ,

A woofer in bassreflex enclosure with plate amp ?

A basshorn ?

Thanks !
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