2-way design.

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RichardJones

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Joined 2002
#1
I want to build a 2-way system.

specs are:

small, narrow baffle.
2-way or single driver
40Hz (?) > 20khz response.
>92db sensitivity.

I was thinking of a using 2 5 1/4 drivers in parallel. One on the front, one on the back.. wired in phase.

dipole configuration.

I do have 4 832732's from Peerless. I have 2 6V013L from Focal.

ideas??

Thanks!

Richard
 
#3
RichardJones said:
I was thinking of a using 2 5 1/4 drivers in parallel. One on the front, one on the back.. wired in phase.

dipole configuration.
Click to expand...

I think you mean bi-pole configuration.

To get you bandwidth requirements you will probably need to get a driver that extends up to the top limit -- 3 or 4" drivers from Tagband, Fostex or drivers that will reach down to 40 Hz (some 5s, but unless you listen at low levels only you will probably need something larger) and fill in the top with a tweeter.

A small driver, plus a larger side-mounted bass driver would probably better meet your narrow front requirement.

dave
 
#4
budget and multiple drivers

well I don't really have a budget... its all just conceptual building at the present time.

I suppose with multiple series / parallel driver combinations I can increase sensitivity too?

Also is it true that with the bi-pole configuration, I don't need to worry about baffle difraction effects at the lower frequency ranges?

Any recommended drivers? I do have 4 peerless 2372? (the CC line 6.5 inch)

2 on the front, 2 on the back? Maybe the MDT33 Morel tweeter?

ideas?

Thanks!!
 
#5
Are these going to be main speakers or surrounds? Assuming mains -- instead of having separate front/back firing drivers, why not go open-baffle MTM? Like:

http://www.linkwitzlab.com/builtown.htm

You sacrifice some bass, so it's unlikely that you'll get to 40Hz, but I doubt you could do it reasonably with a pair of 5 inchers anyway (a matter of physics -- bass requires volume displacement). Perhaps in a Voight Pipe or TL...? Actually, I think a separate woofers/subwoofer would help immensely, because multi-amp multi-driver configurations tend to be better anyway, and you can just build them separate to extend the bass, clean up the mids and improve power handling.

-Won
 
#6
Re: budget and multiple drivers

RichardJones said:
I suppose with multiple series / parallel driver combinations I can increase sensitivity too?

Also is it true that with the bi-pole configuration, I don't need to worry about baffle difraction effects at the lower frequency ranges?
Click to expand...

A bipole is a brute-force way of eliminating baffle-step. It gives you back the efficiency you would normally throw away to compensate for it electrically. You have to either have a room that supports a bipole (ie speakers pulled out from the back wall) or roll off the back driver with an inductor (essentially a 0.5 way arrangement with the phase errors in the shadow of the enclosure where its effects will be greatly reduced)

Any recommended drivers? I do have 4 peerless 2372? (the CC line 6.5 inch)

2 on the front, 2 on the back? Maybe the MDT33 Morel tweeter?
Click to expand...

If you already have the drivers why don't you try it. With 4 you would only be able to try a TLb kind of arrangement. You would need another 4 to make a pr of MTM bipoles -- with 4 bass drivers you should get some pretty decent bass.

dave
 
#7
idea- small 2 way

ok.. I think I want to use 2 5 1/4 in drivers in a bi-pole config. very small enclosure. small baffle width.

maybe 100Hz - 20Khz.

Looking for very nice midrange presentation. maybe on the touch of warm sounding.

open and airy... with extended HF response.

high sensitivity if possible 92db >.

simple crossover. 1st order. maybe just a cap in series with tweeter.

time aligned sloped baffle.

SEAS has some nice mid/woofers. H143 etc..

There is also the Focal 5W4211 etc...

Thanks!
 
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