Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Jensen K-80A vintage coaxials
Jensen K-80A vintage coaxials
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
Thread Tools Search this Thread
Old 13th October 2018, 05:25 PM   #1
chickenshack is offline chickenshack
diyAudio Member
Join Date: Feb 2014
Default Jensen K-80A vintage coaxials

Hi all, I frequently look for info and ideas on the forum but have never posted.
I'm an amateur tinkerer, have rebuilt a couple of tube amps, many turntables, and fixed multiple speakers. My woodworking skills are above average, very few speaker projects on here seem too daunting. The level of skill and knowledge on this forum is well above my own though.

I recently bought a home built console stereo, that contained Heathkit amps-AA-111, AA-11 pre, Jensen K-80A 8" coaxials, and Quam 12c12x 12" extended range speakers- for $50.00! (can't help bragging about it a bit)
There is lots of info on the amps online, a bit on the Quams, but none (that I can find) on these particular Jensens.
Does anyone have any insight on these? Jensen K-80A 16ohm coaxials?
Particularly what enclosure would be most suitable for them, and how they might sound.

I'm currently living in Missoula MT.
Thanks in advance for any info,
Attached Images
File Type: jpg Jensen 4.jpg (189.4 KB, 66 views)
File Type: jpg jensen2.jpg (436.7 KB, 64 views)
File Type: jpg jensen3.jpg (244.3 KB, 67 views)
  Reply With Quote
Old 16th October 2018, 05:22 PM   #2
GM is offline GM  United States
diyAudio Member
GM's Avatar
Join Date: Jun 2003
Location: Chamblee, Ga.

Not the Jensen per se as all I 'know' about them is from here:



Jensen recommended cabs for the various frame sizes: http://www.hifilit.com/Jensen/sheet165A-6.jpg

But in the late '60s - mid '70s I used many 6"- 8" Spark-O-Matic '20' series clones in mobile audio and relatively small apt./dorm room speakers, so high Qts [weak motor], small Vas [relatively stiff compliance], making them good for open back consoles, TLs.

With a published 50-14 kHz range, it was considered 'HIFI' as defined by the then current cinema sound's ~SOTA 50-11 kHz, but obviously not going to 'cut' it by today's lofty standards. Still, if it's anything like the Spark-O-Matic [and assume somewhat more 'refined' in detail], it's probably fine if XO'd to a modern [super] tweeter above ~8 -10 kHz.

These cab alignments were all done pre T/S spec, so other than 'voiced' to personal 'taste' in room, doubt any of the factory or my DIY cabs were technically optimum by today's standards. Factor in their age and ideally you need to [re] break them in and measure each one to design by, ditto the Quams unless used in an open back [or at least 'leaky' constructed] cab like I presume the console is.

Anyway, please keep us updated just in case there's some others that are still salvageable.

Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
  Reply With Quote


Jensen K-80A vintage coaxialsHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
FS: Jensen vintage A-12-PM drivers Milkduds Swap Meet 3 9th October 2018 06:00 PM
Jensen Coaxials widman Full Range 40 21st November 2015 03:09 AM
Jensen coaxials, worth moving 10k miles? tilroh Full Range 27 22nd August 2014 09:41 PM
Vintage Jensen 2-way coaxial speaker reemoo Swap Meet 0 3rd June 2014 07:33 PM
Vintage Jensen Driver - Can you Identify? poynton Multi-Way 3 29th October 2007 05:58 AM

New To Site? Need Help?

All times are GMT. The time now is 08:48 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio