Old Cerwin Vega 123W woofers - diyAudio
Go Back   Home > Forums > Loudspeakers > Subwoofers

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 13th November 2007, 01:21 AM   #1
oquela is offline oquela  United States
diyAudio Member
 
Join Date: Aug 2007
Default Old Cerwin Vega 123W woofers

I recently opened up an older speakers that had a cerwin vega 123W 8ohm woofers...They aren't original CV enclosures. I don't know what the specs are for the woofers(freq. resp., Thiele Small parameters, resonance freq. ideal enclosure type, size, port size, etc.) The woofer pair is in pristine condition.

I've heard that originally, this model was used in a mid 70's CV speaker model 211, but I could be wrong. I tried contacting CV directly, but all I got was this:
Model 211 Specifications

FREQ. RESPONSE: 32 Hz 20 kHz
POWER HANDLING: 5-100 WATTS RMS
SENSITIVITY: 98dB
CROSSOVER POINTS: 2500 Hz.
IMPEDANCE: 4-8 OHMS
LOW FREQ. 122W2 or L121 12 / 2 VOICE-COIL WOOFER
HIGH FREQ. UHF-91 or DT-8 5 DHORM (1 VC) (9284 or 2686 diaphragm)
VOLUME CONTROLS: HIGH
DIMENSIONS: 15.5 x 15.5 x 26
CIRCA MID 70s

It doesn't look like my 123W were in this design, and CV didn't have any specs on my specific woofer. Does anyone here have that info? I'm trying to build a proper enclosure and select a xover point for these. Any help would be appreciated.
  Reply With Quote
Old 13th November 2007, 03:11 AM   #2
Ron E is offline Ron E  United States
diyAudio Member
 
Ron E's Avatar
 
Join Date: Jun 2002
Location: USA, MN
Parameters change over time - especially 30 years.

It is not terribly difficult to measure T/S parameters, you may find some nearby forum members who can show you how, or you might find people in a nearby audio club who can do it.

All you really need is a resistor, a voltmeter or DMM, and your computer with a sine wave generating program.

My 12" C-V woofers from the late 80's have a really low Q - like 0.17, and a fairly high Vas, about double most recent woofers at 300-350liters. Fs ~20Hz.

C-V seems to frequently use ~2 cubic foot boxes tuned to ~30Hz with their 12" woofers.
__________________
Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works. --Carl Sagan
Armaments, universal debt, and planned obsolescence--those are the three pillars of Western prosperity. Aldous Huxley
  Reply With Quote
Old 20th November 2014, 03:31 AM   #3
oquela is offline oquela  United States
diyAudio Member
 
Join Date: Aug 2007
Thank you for the info! It was very useful. In my haste, I just noticed I didn't say "thanks!"



Sorry about that, and thanks again!
  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
Cerwin-Vega D-7's sorenj07 Multi-Way 0 9th February 2008 02:10 AM
Cerwin Vega D-7 sorenj07 Multi-Way 2 3rd March 2007 08:16 PM
Cerwin Vega 153 EB rickcr42 Subwoofers 4 31st May 2005 12:14 AM
Anyone out there use cerwin vega...... Radik Multi-Way 4 6th February 2003 01:13 AM


New To Site? Need Help?

All times are GMT. The time now is 07:38 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