Visaton B200 vs FR125S in yet another FR+W OB - diyAudio
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Old 14th December 2005, 01:48 AM   #1
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Default Visaton B200 vs FR125S in yet another FR+W OB

Having had to reconsider (yet again) my plans, I'm now thinking about an OB design with a full range driver and a 15" woofer. I think I've narrowed the choice for the FR driver down to the B200 or the FR125s. The FR125s has the benefits of cost and, perhaps, less beaming of high frequencies. The B200 has higher efficiency going for it. I'm torn between the two, but I'd really like a higher efficiency design.

Thoughts?

I'd probably use something like the Eminence Beta 15" (or two) for the woofer. I'd use the width of the OB panel to set the 'crossover' frequency for the FR. One concern about the FR125s is how well it will work to transition from a 15" to a 4". Perhaps I'd be better off with a smaller woofer if I went with the FR125s. Perhaps multiple 10" drivers? I'm hoping to get 40 to 50 Hz out of the woofer.

Thanks.

Paul
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Old 14th December 2005, 06:20 AM   #2
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I've got the B200's in temporary OB's and am pretty pleased with them. Very dynamic, fast and good resolution.
I picked them because of the good fit for OB and the high sensitivity so I can start playing with some SET's.
I heard the WR125's in boxes last week. We bottomed them out fairly easily. They may do okay in OB for a smaller room but I don't see them doing what the B200s do. The mids were also not as detailed. Not a bad driver for their size though.

I'm also looking for a woofer solution. Options are (all with LP XO's):
a. 1 or 2 more B200s per side.
b. 1 15" woofer on baffle
c. 2 x 12" woofers on baffle
d. 2 x 12" woofers in W or H frame

None of the above would get you to 20hz. You'd need a sub for that. Whatever you do, you need to make sure the woofers are fast enough to keep up with the B200's. Then you need to consider baffle width, wings, driver placement, XO, EQ and amplification.

Have a look at the "darkstar" thread on audiocircle for more info on the B200's.

Also, be sure to dampen the frame to even out the response.

Good Luck.
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Old 14th December 2005, 01:31 PM   #3
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I've been thinking about switching over to some kind of open baffle midbass-bass as well. This woofer seems to be pretty nice, nice price, nice Q, nice cast frame. Nice all around...
Joe

http://stores.channeladvisor.com/mus...s/700-08-4506?
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Old 14th December 2005, 02:32 PM   #4
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If it was me, I'd go for a single full-ranger like the B200 or FR125 on an open baffle, supported by H frame dipolar woofers, at least 10", preferably 12", 2 per-side. You'll need active EQ for them, but that'll get you down to circa 40Hz. For me the primary benefits of dipoles are at the low-frequency end, as they activate less room-modes (ironic as that's where they're hardest to get working). Of course, if you're going for active eq, then there's no reason you couldn't try other drivers with a lower Q, as you'd have the correction facility built in...
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Old 14th December 2005, 03:24 PM   #5
sumacSK is offline sumacSK  Slovakia
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Hi,

2x eminence beta15 + visaton B200 thats exactly what I've been thinkink about for quite some time...
Try it. I'm really interested in your results...

Best of luck with your project Martin
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Old 14th December 2005, 03:28 PM   #6
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Tough choice, I'm sure both would be really nice. Check out the link below for info regarding the FR125 on OB.

http://fullrangedriver.com/forum/viewtopic.php?id=239
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Old 14th December 2005, 03:30 PM   #7
Rudolf is offline Rudolf  Germany
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Quote:
Originally posted by Scottmoose
If it was me, I'd go for a single full-ranger like the B200 or FR125 on an open baffle, supported by H frame dipolar woofers, at least 10", preferably 12", 2 per-side....
That´s exactly what I would do too! I could never understand why people would want to support an full-ranger on OB with some woofers in CB or BR.
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Old 14th December 2005, 05:48 PM   #8
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Thanks for the knight woofer link, Joe. It looks perfect! And the price is great.

I would definitely want the woofer(s) dipole as well. I'm thinking of using gainclones of some sort for amps and would like to build the (minimal I can get away with) woofer EQ into the bass GC. That's all down the road a bit.

My main concern with the B200 is if it really exhibits the rising response shown on the datasheet:

http://www.visaton.com/english/artikel/art_771_1_3.html

Has anyone taken measurements of it?

I guess I'm also concerned about beaming. I'll augment it with the Neo3 if that is objectionable. Again, down the road.

Paul
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Old 14th December 2005, 08:00 PM   #9
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Quote:
My main concern with the B200 is if it really exhibits the rising response shown on the datasheet:
I`d not worry about this. Even when the response would rise (what I actually don`t know), as it`s obviously rising very uniformly a simple shelving circuit could care about this.

OTOH You could even have a benefit from that rising response and not angle the speakers to the listening position but to hear off-axis to some degree (literally spoken).
Large cone-area speakers often sound somewhat "underrepresented" in the highs when equalised to flat response on axis.
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Old 15th December 2005, 07:35 AM   #10
westend is offline westend  United States
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I thought I'd post here as I seem to be going in the opposite direction of Paul's leanings but using the same speakers. I have had the FR125's in OB since Thanksgiving and have been experimenting with them as to panel sizes, placement, listening,etc.. Although the FR125 are an amazing driver and mounted in OB, deliver a great midrange and lower treble, they aren't the ticket for me. I will use them in small boxes for HT as I believe they would shine in that application. They might do well in a horn, also.
One thing that did impress me was the OB alignment. I am now thinkiing of getting the B200's for 2channel. For my listening habits, the smaller 4" just didn't seem to have the power or fuller midbass/bass I like to hear. I am hoping that the B200's can deliver that in OB.
Perhaps this is the start of a quest for the perfect driver
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