What to do with these OLD 10" extended range 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 23rd July 2004, 12:51 AM   #1
diyAudio Member
 
swirv's Avatar
 
Join Date: Aug 2002
Location: South Carolina
Send a message via AIM to swirv
Default What to do with these OLD 10" extended range drivers?

I salvaged a pair of 10" drivers from a friends atic a while ago and was curious if the group had any sugestions on what to do with this driver. It was used in an open baffle design in a console HI-Fi from the 70's(?) paired with a small fostex horn tweeter. I have a few pics of the drivers. Forgive me for the poor quality, the images where taken with my cel phone.
Attached Images
File Type: jpg heldout2.jpg (23.0 KB, 136 views)
  Reply With Quote
Old 23rd July 2004, 12:53 AM   #2
diyAudio Member
 
swirv's Avatar
 
Join Date: Aug 2002
Location: South Carolina
Send a message via AIM to swirv
side view...
Attached Images
File Type: jpg heldout.jpg (26.2 KB, 110 views)
  Reply With Quote
Old 23rd July 2004, 12:54 AM   #3
diyAudio Member
 
swirv's Avatar
 
Join Date: Aug 2002
Location: South Carolina
Send a message via AIM to swirv
Edge showing paper cone with paper surround.
Attached Images
File Type: jpg closeedge1.jpg (20.8 KB, 98 views)
  Reply With Quote
Old 23rd July 2004, 12:56 AM   #4
diyAudio Member
 
swirv's Avatar
 
Join Date: Aug 2002
Location: South Carolina
Send a message via AIM to swirv
Back of driver showing markings. "zenith" 49-1221 27179
Attached Images
File Type: jpg backclose1.jpg (20.2 KB, 89 views)
  Reply With Quote
Old 23rd July 2004, 02:57 AM   #5
Stocker is offline Stocker  United States
diyAudio Member
 
Join Date: Dec 2003
Location: Austin
You should give them to me.

Slap them in a quickie box and see what they sound like. I'd try a cubic foot or two, just in case there is some bass capabiilty there. Were they mounted or just laying around raw?
__________________
Jesus loves you.
  Reply With Quote
Old 23rd July 2004, 01:03 PM   #6
Banned
 
Join Date: May 2004
Location: New Hampshire
I'd toss them. Judging by the overall look they aren't going to perform well in the bass, which relegates them to midrange use, and tens are not much good for midrange as they get beamy at too low a frequency. You can get a modern 6 1/2 that wil run rings around these for as little as 15 bucks, so I'd say that these are really only good for a collector or for landfill.

www.billfitzmaurice.com
  Reply With Quote
Old 23rd July 2004, 01:34 PM   #7
AGGEMAM is offline AGGEMAM  Denmark
diyAudio Member
 
AGGEMAM's Avatar
 
Join Date: Jul 2002
Location: Copenhagen
Dumpster filler!

I could be wrong but they look absolutely ghastly .. I'd toss them with a second thought. However if you really wonder about it, you can always test as mentioned above, I'm sure the result would be the same though.
__________________
Hmm .. no .. I really haven't got anythig cool to say ..
  Reply With Quote
Old 23rd July 2004, 02:12 PM   #8
diyAudio Member
 
swirv's Avatar
 
Join Date: Aug 2002
Location: South Carolina
Send a message via AIM to swirv
Default Counter Constructive?

Ok... These things are not going in the trash. They are from Zenith's "Big Bottom" days and have a good amount of bass for an all paper 10". The mid-range is pretty good. I have a few ideas on what to do with them but would like some constructive advise.

I have no specs on the drivers but suspect they where used open baffel. I figure I'd use them as a woofer with a NSB as a mid and a super tweeter. I have a few NSB's and Onkyo tweeters from a El'Cheepo project I was doing. I also have a pair of unlabled inductors from a lowpass crossover used in auto subs. The crossovers where 2nd order 85Hz @ 4R. The 10's are 16R speakers so how do I figure the crossover freq if I use just the inductor and run the 10's first order LP. The cap value was 331mfd. The 10" drivers are pretty loud and keep up with the NSB's. I figure they are much more efficient than the 4" drivers.

Id really like to use these drivers and get the most out of them. I do not belive in throwing away a learning experiance.

I also wonder if I should ModPodge the 10"s. Dave D claims that alomost all paper drivers could do with a coat of the stuff.

pic of inductor
Attached Images
File Type: jpg inductor.jpg (24.1 KB, 70 views)
  Reply With Quote
Old 23rd July 2004, 05:53 PM   #9
Banned
 
Join Date: May 2004
Location: New Hampshire
Have you at least measured the Fs? I'd be surprised if it's less than 80 Hz, and that pretty much rules them out as woofers. I'd give more constructive advise but you're going to have to help out a bit.
  Reply With Quote
Old 23rd July 2004, 07:27 PM   #10
Kensai is offline Kensai  United States
diyAudio Member
 
Join Date: Jan 2004
Location: St. Louis
Send a message via AIM to Kensai
If you found them in an OB config unit, I would suggest trying that. They have the look of an OB compatible unit. Grab yourself a couple $3 MDF "shelves" from Home Depot, cut you a couple circles out at ear level, and devise some cheap method to make them stand up. I used a pair of $2.50 garage wall "hangers" (basically U shaped pipe, flattened a bit on one side with a pair of screw holes and plastic capped on the other, meant for hanging up hose or bikes or whathave you on your garage walls), and maybe $1 worth of hardware (bolt, nut and the largest diameter washer I could find with the right sized hole in the middle) to make my testers (which I seem to have failed to stop testing with so far) stand up. I've got them sitting on a cut square of that puffy mesh shelf/drawer lining stuff since I'm in a raw concrete basement, but if you're on carpet, no worries. Once you've got them stood up, just apply some careful pressure near the top to get both hangers bent evenly and maybe give the thing a very slight backwards tilt.

One other consideration, since they're 10"ers with no coax mounted tweet or even a whizzer, they're not likely too extended on the high end, probably not even approaching 10khz. Possibly leave enough space at the top of your testers to later mount a cheap tweeter to handle the top octave or two (with a cheap cap and possibly a cheap resistor or lpad in line to cross and control).

Have fun and report back if you do anything with them.

Kensai
  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
FS: Alnico ~4" Full-range Drivers speaker Swap Meet 7 21st March 2009 09:55 PM
Extended range measurement mics and pre-amps percy Multi-Way 1 17th November 2007 01:55 AM
Extended range tweeters and headphones percy Multi-Way 0 17th November 2007 12:04 AM
32 NSB (269-570) 4" Full Range Drivers Lusso5 Swap Meet 0 3rd March 2006 02:05 AM
Which 2" extended range from Tang Band? nrgy Multi-Way 9 29th September 2004 07:50 PM


New To Site? Need Help?

All times are GMT. The time now is 03:37 AM.


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