DIY High Efficiency Bi-amped Speaker redesign - 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 5th November 2006, 11:10 PM   #1
diyAudio Member
 
Join Date: Apr 2003
Location: Tulsa, OK
Default DIY High Efficiency Bi-amped Speaker redesign

I currently have a setup utilizing an Eminence psd2002 horn driver, H290 radial horn, and dual 12" Eminence Delta 12LFA woofers. I use a Behringer DCX2496 to cross them over, and use a Behringer EP2500 for the woofer amp, and a Samson Servo 200 for the tweeter amp. The design is actually a 2.5 way, with the bottom woofer rolling off around 350hz using a series inductor. In the picture you can see the first revision (with a single woofer and a passive crossover) and the way it is in its current state.
Click the image to open in full size.

As you can imagine, the main issue is sound quality. You may ask why if sound quality is the issue, why I dont build a proven design using home drivers. Well, I already have the prosound drivers, and I like the ability to crank the system to extreme levels with little distortion. This setup is being used in my home theater, and while the sound quality is good, I would like it to be better. Going from the first revision of the speaker to its current state made a large difference (for the better) in sound quality, so I hope the following will do the same.

What I was thinking was to convert the system to an MTM, since the baffle step compensation is really not needed in the room they are in. Plus, the advanced features with the DCX2496 make it easy to implement it if needed in the future. This would allow me to place the drivers closer together also. Here's a (bad) mspaint example of how it might look
Click the image to open in full size.

I was also thinking that upgrading the horn lenses from a Radial type to a Constant Directivity would be much better for the high frequencies. Going with this horn lens in particular http://www.partsexpress.com/pe/pshow...90-556&scqty=2

Does anyone have any recommendations on this idea? To be honest, I do not think I have ever seen an MTM using prosound drivers like this, so Im not sure what to expect.

Thanks
  Reply With Quote
Old 6th November 2006, 05:28 PM   #2
DougL is offline DougL  United States
diyAudio Member
 
Join Date: Feb 2004
Location: Wheaton IL.
Blog Entries: 30
Quote:
What I was thinking was to convert the system to an MTM, since the baffle step compensation is really not needed in the room they are in. Plus, the advanced features with the DCX2496 make it easy to implement it if needed in the future. This would allow me to place the drivers closer together also. Here's a (bad) mspaint example of how it might look
I was inspired to start research on a pro driver after I saw a JBL L100 remake.

First, I do not think that you will be happy with an MTM, using your drivers. The MTM configuration Makes the system more sensitive to driver center to center distances. A horn Tweeter also increases the distance between woofers.

If you try it, use the 8'th order LR filters on the dcx2496 and keep the drivers as close to each other as possible.

I agree that you need to replace the horn.
I would look at:Parts Express 12" waveguide or something similar.

Just my thoughts, but converting to a 3 way with a 6 or 8 inch midrange would allow a much smoother midrange and less stress on the tweeter, without loosing the advantages of your current system.

Hope this helps;

Doug
  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
high efficiency speaker with a budget of us$1000,00 angeloitacare Multi-Way 21 22nd May 2008 11:23 PM
Large high efficiency WMTMW speaker project Brett Multi-Way 9 1st August 2007 06:19 AM
FS: High-efficiency DIY-kit Speaker System, circa 1960... GordonW Swap Meet 1 12th March 2005 05:40 AM
High Efficiency Speaker Plans BillFitzmaurice Swap Meet 6 25th September 2004 10:12 PM


New To Site? Need Help?

All times are GMT. The time now is 09:36 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