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Multi-Way Conventional loudspeakers with crossovers

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Old 11th November 2010, 07:56 PM   #11
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Of the drivers mentioned i'd put the B200 ahead (with phase plugs to sort the HF disperion issuse). FE206 would be my next choice, but very low Q may hurt with a low XO. W8-1772 would be my last choice, the W8-1808 i liked better all round and it is better suited parameter wise to OB.

Personally i'd use a smaller driver with better mids and top... Alpair 12 would ba good candidate (keeping the driver largish), but at a lower efficiency.

On that last note, measured efficiencies of B200 are 91, and W8-1808 is 92. FE206En comes in at 96dB, A12 at 89 dB.

dave
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Old 11th November 2010, 07:59 PM   #12
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Quote:
Originally Posted by jwmbro View Post
MarkAudio CHP-70 fullrange drivers
With CHP only available in Japan, Germany, and Oz, you may well want to consider EL70 which was developed on the earlier CHP. (and save yourself some shipping)

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Old 11th November 2010, 08:00 PM   #13
ScottG is offline ScottG  United States
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Quote:
Originally Posted by oLjud View Post
Yeah you probably right! But with a baffle and passive crossover, what would you choose for driver?
..completely un-baffled, that would be tough to say..

Here is a driver similar to the already mentioned Audio Nirvana 8's, but it has a better motor, much more linear excursion, and it has a rising lower-mid freq. response below 400 Hz:

Dayton PS220-8 8" Point Source Full-Range Neo Driver | Parts-Express.com

It would need a lot of correction at higher freq.s however.

The Omnes Audio L8 is another possibility that counters it's low x-max with a high qe. (..a lot cheaper construction than the Dayton however.)
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Old 11th November 2010, 08:05 PM   #14
Rudolf is offline Rudolf  Germany
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Backed by two Alpha 15 the FR driver will need more excursion than just 1 mm Xmax. The Tangbands will do nicely, but don't forget the Supravox HP 215 Signature.

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Old 11th November 2010, 08:13 PM   #15
ra7 is offline ra7  United States
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Quote:
Originally Posted by Tea-Bag View Post
I've been playing with 4" drivers on OB,
Compared to 8 inches drivers, the less dynamics and smaller soundstage just dont cut it in my fairly large room. I would stay 8" like RA7 suggest. The 3" fostex's beat out the 4" CHR70s in OB.
Yes, I agree with this. The smaller drivers create a much smaller soundstage. This is especially irritating on a OB in a moderate sized room. When you switch to a larger driver, the difference is obvious.
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Old 11th November 2010, 08:14 PM   #16
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Originally Posted by planet10 View Post
With CHP only available in Japan, Germany, and Oz, you may well want to consider EL70 which was developed on the earlier CHP. (and save yourself some shipping)
Oops, jwmbro i see that despite US flag you are in Germany. EL70 should still be a consideration, available in Europe from a number of vendors including Henkjan.

Military? (then APO would equalize shipping),

dave
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Old 11th November 2010, 08:27 PM   #17
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I'm surprised no one has mentioned the wild burro driver designed for OB use.
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Old 11th November 2010, 08:54 PM   #18
jrenkin is offline jrenkin  United States
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Personally, I like the Jordan JX92S, but I use them in a very small room and they have a quality of sound that I can only attribute to the metal cone. They definitely need the bass support, which I do not have yet.
I will try the B200s in the same set up soon, so maybe I can compare. It is just a 20" wide baffle, but it is a nice easy sound (digitally equalized).
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Old 11th November 2010, 09:15 PM   #19
Flaesh is offline Flaesh  Russian Federation
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Quote:
Originally Posted by Rudolf View Post
Backed by two Alpha 15 the FR driver will need more excursion than just 1 mm Xmax..
enougf for about 105dB @1m for 8" crossed @200Hz..
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Old 11th November 2010, 09:41 PM   #20
jwmbro is offline jwmbro  United States
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Quote:
Originally Posted by planet10 View Post
Oops, jwmbro i see that despite US flag you are in Germany. EL70 should still be a consideration, available in Europe from a number of vendors including Henkjan.

Military? (then APO would equalize shipping),

dave
Nope, not military, just here as a student. I already have the CHP's in fact, playing in their box, in order to accelerate the break-in before I build my speakers. Still lacking the Alpha 15A's though, so no build progress yet. Not that it's particularly tricky to build a frame to hang drivers from . Will be sharing pictures of my construction once I make some progress though. Not the first project on my list I must admit.
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