Go Back   Home > Forums > Loudspeakers > Multi-Way
Home Forums Rules Articles Store Gallery Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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 September 2010, 02:00 AM   #1
DJNUBZ is offline DJNUBZ  United States
diyAudio Member
 
Join Date: May 2003
Location: Chicago
Default How can I improve this DIY kit

So I built a pair of parker audio 98's about 6 years ago. You can find the kit here

98 & 98 kit

I used a 2uf cap on the tweeter and the stock enclosure specs. Now I would like to improve the design. I have two ideas on how to improve the design but could use input.

My first idea is to improve the crossover. The only real improvement I can really see is to add a low pass to the woofers.

The second idea I have is to add a powered woofer to help fill in the low end. These speakers really don't have much bass and I don't think a different style of enclosure will really change this. I even thought about mounting these in a back loaded horn but unless someone else tells me different I think that a semi active design may be the way to go.

Aside from these change does anyone else have any ideas how I could really maximize the sound from these drivers?
  Reply With Quote
Old 5th September 2010, 03:40 AM   #2
diyAudio Member
 
vinylkid58's Avatar
 
Join Date: May 2005
Location: Victoria, B.C.
Unless you can measure (or already know) the basic TS numbers for you drivers, a re-design is going to be pretty difficult.

No bass from 2 x 6.5" drivers in a 1.25 ft^3 box doesn't sound too promising.

jeff
  Reply With Quote
Old 5th September 2010, 03:57 AM   #3
diyAudio Member
 
Richard Ellis's Avatar
 
Join Date: Sep 2006
Location: Mar del Plata, a BIG seasonal getaway city, can see the Ocean from our residence.
Yikes!!......A system impedence of two Ohms? Ouch! For the 6.5"....
Looking at their site we have: Fs 60 Hz, Qts .26, Vas .78 Cubic foot, Four Ohm, 93 Db@1W1M. Not the best of specs...particularly the 60Hz Fs. That's a long way to reach down toward some deep Bass......& it won't get there.

__________________________________________________ ___Rick.....
  Reply With Quote
Old 5th September 2010, 04:07 AM   #4
diyAudio Member
 
pheonix358's Avatar
 
Join Date: Jul 2008
Location: Stockport South Australia
Buy a much better/different kit? It's been 6 years after all!
__________________
What we don't understand is called magic.
  Reply With Quote
Old 6th September 2010, 01:33 AM   #5
DJNUBZ is offline DJNUBZ  United States
diyAudio Member
 
Join Date: May 2003
Location: Chicago
I have considered a different kit but I figured that I should make the best of this one before I do that. The 2 ohms really isn't a problem with my amp and they can easily be wired in series to become 8 ohms if need be. The way I see this system, now that I have built it and learned quite a but, is trying to get bass from a midrange driver. The thing is that you can't get bass from a midrange driver. What do you guys think about adding a bass driver that is possibly powered? I would have the MTM played by my zen select and add a 12-15" woofer
  Reply With Quote
Old 6th September 2010, 01:55 AM   #6
diyAudio Member
 
Join Date: Feb 2002
Location: Sydney
the first step is to measure the drivers...
with a low Qts, maybe reconfiguring them as a 2.5 way in an EBS alignment would work
__________________
‘today… there lives alongside the twentieth century the tenth or thirteenth. A hundred million people use electricity and still believe in the magic power of signs and exorcisms” Trotsky
  Reply With Quote
Old 6th September 2010, 04:12 AM   #7
Speakerholic
diyAudio Moderator
 
Cal Weldon's Avatar
 
Join Date: Jan 2004
Location: British Columbia
I think you already answered your own question. Add a powered woofer.
__________________
Next stop: Margaritaville
Some of Cal's stuff | Cal Weldon Consulting
  Reply With Quote
Old 6th September 2010, 06:13 AM   #8
diyAudio Member
 
Moondog55's Avatar
 
Join Date: Jun 2007
Location: Norlane; Geelong: Victoria: Australia
Quote:
Originally Posted by Cal Weldon View Post
I think you already answered your own question. Add a powered woofer.
What Cal said, but stereo and crossed a little higher than 80Hz
__________________
QUOTE" The more I know, the more I know, I know (insert maniacal laugh >here<) NOTHING"
  Reply With Quote
Old 6th September 2010, 06:14 PM   #9
DJNUBZ is offline DJNUBZ  United States
diyAudio Member
 
Join Date: May 2003
Location: Chicago
I am sure I can find the drivers but do you guys have any suggestion on an amp? If I go this way I think I may high pass the mtm at around 200-260 and have the powered part play from there down.
  Reply With Quote
Old 6th September 2010, 08:21 PM   #10
Speakerholic
diyAudio Moderator
 
Cal Weldon's Avatar
 
Join Date: Jan 2004
Location: British Columbia
Might be best if you think in the 100-200 range. A lot of plate amps don't go up to 260. Check out Parts Express or Google "Plate amps for sale" Also best to buy an amp that has more power than you need an just go easy on the gain control.
__________________
Next stop: Margaritaville
Some of Cal's stuff | Cal Weldon Consulting
  Reply With Quote

Reply


Hide this!Advertise here!

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
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
5.1 DIY kit with on PA speakers (or good & small DIY kit with PA speakers) ? jm_kzo Multi-Way 54 22nd April 2009 08:54 PM
DIY Kit Midnite Mick Multi-Way 9 23rd June 2006 07:52 PM
Kit or DIY? Spasticteapot Chip Amps 4 13th January 2006 03:12 PM
My plans for this kit, any comment to improve!!!! siu sin man tho Tubes / Valves 14 16th February 2004 03:45 PM


New To Site? Need Help?

All times are GMT. The time now is 11:21 AM.

Page generated in 0.17295 seconds (49.89% PHP - 50.11% MySQL) with 10 queries

Copyright ©1999-2012 diyAudio