3-way around the TangBand W4-657SB: what drivers? - diyAudio
Go Back   Home > Forums > Loudspeakers > Multi-Way

Multi-Way Conventional loudspeakers with crossovers

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 31st May 2006, 09:58 AM   #1
tcpip is offline tcpip  India
diyAudio Member
 
Join Date: Jan 2003
Location: Mumbai, India
Default 3-way around the TangBand W4-657SB: what drivers?

I happen to have some W4-657SB drivers (two pairs). I have no experience with them, but I think they'll be decent low-budget metal-cone wide-range drivers. They're usually referred to as full-range drivers, but I doubt I'd really like to listen to a system with these drivers being used as FR drivers.

So I now want to build a 3-way by adding a tweeter and a woofer to these. The W4-657 has Fs of 75Hz, so they'll probably be fairly decent wide-range midrange drivers. I am thinking of building some such box, with a tweeter and woofer, all front-firing in a very conventional floor-stander setup.

My question: what tweeter and woofer do you recommend? I want to select inexpensive drivers which "punch above their own weight", like the W4-657s do. On the tweeter front, I have received a lot of very useful advice earlier, so I guess any of those recommended budget tweeters will be a good fit. Since the W4-657 goes fairly high, I don't even need to xo the tweeters very low... 2.5KHz, 4th order, will probably be fine. Therefore, the choice of tweeters is quite wide.

On the woofer front, what do you suggest? I was thinking of the Dayton RS270 10" metal cone woofer, in a sealed cabinet with LT and an amp, xo'd using active xo to the TangBand somewhere between 150-300Hz, 4th order. The price seems proportionate to what one would spend on a speaker built around the W4-657, and the RS270 has the TangBand-like reputation of being better than its price indicates.

My last question: should I use a pair of W4-657 per side, in an MTM setup with the tweeter in the middle? Will the W4 generate enough output as a midrange from, say, 150Hz-3KHz if I use just one per side? I play loud sometimes, but the rooms in Bombay are 20'x12' or less most of the time.
  Reply With Quote
Old 31st May 2006, 02:25 PM   #2
diyAudio Member
 
Timn8ter's Avatar
 
Join Date: Jul 2003
Location: Seattle, WA
If you want to play loud, crossing the W4 at 150Hz will probably be too low. I suggest finding a crossover point that keeps the excursion on the W4 low, say 400Hz or so.
  Reply With Quote
Old 31st May 2006, 07:37 PM   #3
diyAudio Member
 
critofur's Avatar
 
Join Date: Jan 2004
Location: Columbus, OH
Send a message via AIM to critofur Send a message via MSN to critofur Send a message via Yahoo to critofur
These tweeters: AUDAX TM020J3 3/4" SHIELDED TEXTILE DOME TWEETER (Part# 276-102 at Parts Express) are great at a good price. The price seems to have gone up since I last bought some, I gues they realized how good they are, they're $16 each now, unless you setup a wholesale account to get wholesale prices.

It was amazing how much power we had to put into one of these suckers before it would burn out. The response curve is ver nice. It's surprising how low they can crossover considering they're only 3/4 inch. They have a nice high sensitivity, which you could pad down if you needed to.

Why they would be good for you: they have a Neo magnet instead of a large ceramic magnet which means you can mount them closer to your midrange, this would be particularly important if you wanted to crossover at a high frequency.

Is $15 more than you want to spend on each tweeter?

Oh, and when we measured them the response curve looked even BETTER than the data sheet ( http://www.partsexpress.com/pdf/276-102.pdf ) that's the first time I've ever seen that. We didn't do waterfall plots/measure distortion etc... I should do that soon to satisfy my curiosity, have to get my garage setup since I moved far away from the speaker company I was working at.
__________________
Critofur
http://www.ohmspeakers.com <- all the folks here are my friends
  Reply With Quote
Old 31st May 2006, 07:46 PM   #4
diyAudio Member
 
critofur's Avatar
 
Join Date: Jan 2004
Location: Columbus, OH
Send a message via AIM to critofur Send a message via MSN to critofur Send a message via Yahoo to critofur
Default Re: 3-way around the TangBand W4-657SB: what drivers?

Quote:
Originally posted by tcpip
On the woofer front, what do you suggest? I was thinking of the Dayton RS270 10" metal cone woofer, in a sealed cabinet with LT and an amp, xo'd using active xo to the TangBand somewhere between 150-300Hz, 4th order. The price seems proportionate to what one would spend on a speaker built around the W4-657, and the RS270 has the TangBand-like reputation of being better than its price indicates.
I haven't tested these myself, but looking at: http://www.partsexpress.com/pdf/295-368g.pdf I see a nasty "dipbump" (down then back up) right above 1Khz and then the clasic nasty metal cone breakups beyond that. If I was using metal cones I would probably only want ones that were well damped by some kind of laminate w/other materials, or crossed over fairly low for their size at a high slope. If you were crossing them over at 150 Hz, 4th order, then maybe the high frequency crud wouldn't be an issue? But I'm not an expert in that area, I figure that stuff out by hands on testing: build it, listen to it, measure it, tweak it, repeat...
__________________
Critofur
http://www.ohmspeakers.com <- all the folks here are my friends
  Reply With Quote
Old 1st June 2006, 08:07 AM   #5
tcpip is offline tcpip  India
diyAudio Member
 
Join Date: Jan 2003
Location: Mumbai, India
Default Re: Re: 3-way around the TangBand W4-657SB: what drivers?

Quote:
Originally posted by Timn8ter
If you want to play loud, crossing the W4 at 150Hz will probably be too low. I suggest finding a crossover point that keeps the excursion on the W4 low, say 400Hz or so.
Yes, I am beginning to wonder too. I read an interesting thread which essentially contains just measurements of this driver, and that thread (and others) mention heavy distortion at low frequencies. So I'll probably aim for placing the woofer closer to this W4, and xo at perhaps 300Hz or so.


Quote:
Originally posted by critofur
These tweeters: AUDAX TM020J3 3/4" SHIELDED TEXTILE DOME TWEETER (Part# 276-102 at Parts Express) are great at a good price.
Thanks a lot for the pointer. In fact I think this one was mentioned earlier too, when I'd asked for tweeter suggestions in an earlier thread. See my first post above... it has a link to that other thread where I'd received very good suggestions. And yes, $16 each is well within my budget.

Quote:
Originally posted by critofur
I haven't tested these myself, but looking at: http://www.partsexpress.com/pdf/295-368g.pdf I see a nasty "dipbump" (down then back up) right above 1Khz and then the clasic nasty metal cone breakups beyond that. If I was using metal cones I would probably only want ones that were well damped by some kind of laminate w/other materials, or crossed over fairly low for their size at a high slope. If you were crossing them over at 150 Hz, 4th order, then maybe the high frequency crud wouldn't be an issue?
You're right, but I feel that it's worth a shot using it even at an Fc of 300, 4th order. That way, it'll be 48dB down at 1.2K. If that isn't low enough for the peak, maybe I can add a notch or something...

As you said, listening and iterating is the best, but I feel that with the iterative approach, this driver will probably give good results even as high as 300Hz, as long as I'm willing to go 4th order.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Vas of TangBand W6-789S midbass drivers? tcpip Multi-Way 3 7th March 2006 04:41 AM
FS TangBand w3-881s modified drivers fcserei Swap Meet 3 28th February 2005 03:01 PM
budget sub-sat system with tangband drivers DIY_Peter Multi-Way 1 11th December 2004 07:20 PM
Tangband w3-871 drivers for sale Keith D Swap Meet 0 27th September 2003 08:35 PM
TangBand full range drivers Fred Sanford Multi-Way 3 27th March 2002 04:02 PM


New To Site? Need Help?

All times are GMT. The time now is 09:46 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2