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Jensen System 500 Speakers - rare find and a nice surprise!

Krosya

Well-Known Member
Thanks to all of you and this forum, ever since I got into vintage stereo I cant pass up on interesting speakers. To keep myself from buying everything I come across, I try to stick with rather rare and unusual model. Plus only if they are sold cheap (under $100). I already made a thread about rather rare Synergistics speakers that I absolutely love, and now I came across another uncommon pair - Jensen System 500. They were relatively cheap at a local second hand store, looked in pretty good condition, other that in need of woofer re-foam. So I thought I'd take a chance on them.
After getting them, I did some research on this Brand/Model, yet unfortunately there is not that much info on them, other than they are rare, come from a well respected company (at least at the time they were made) and model, while not the TOTL, but pretty close. Only real info I could find was on the TOTL System B, and their smaller brother System 400. As little info there was, all of it sounded very good so I decided to go ahead and do the refoam.
These are interesting speakers - at first they look like your typical acoustic suspension 3 ways with L-pads for highs and mids. But - turn them around and you find another tweeter - similar to System B and C Jensens.



After taking the woofers out for refoam, looking inside the cabinets you can see that Mid driver has it's own large enclosure. :




Woofers themselves to me look like your typical drivers ( I dont really have much experience on this subject)





Front positioned L-pad remind me of those on Realistic Mach speakers:


Overall - its a solid, heavy well made speaker.
Well, refoam is done:





And speakers are put back together and hooked up to my "test site":





And they sound GREAT! Now, I only had time to play a few records, but already I can tell that they sound very clear - great mids and highs. Good bass - strong when recording call for it but not overwhelming or exaggerated like it can be in some speakers. Superb soundstage. All in all - they sound great to my ears. I need to do more testing with different types of music, but so far they seem to sound better that my Mirage 360 (and I love those speakers) as well as Realistic Optimus 5B - both well respected here.
I think I lucked out with these - just to think I almost didnt get them - I walked away after looking at them first, but for some reason thought to come back and get them - Glad I did! I guess they really knew how to make a good pair of speakers back then in the USA!
 
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Nice find.

I've been enjoying some Jensen Model 5's as well, underrated vintage speaker imho.
 
No comment on these loudspeakers, but --
I wonder what a "Synthesized Crossover Network" is? ;)

This is the kind of thing I think of upon reading that term...

516TYyvgd7L._SL1000_.jpg
 
No comment on these loudspeakers, but --
I wonder what a "Synthesized Crossover Network" is? ;)

This is the kind of thing I think of upon reading that term...


516TYyvgd7L._SL1000_.jpg
Yeah, I'm not sure what that means either - probably a marketing thing.
 
I remember seeing such a Jensen speaker....

Don't remember if it was seventies or early eighties. But Jensen was one of the companies that sold great products for a reasonable price. Most everyone I knew back in the seventies had Jensen car speakers in their cars. There a great sounding speaker and don't have the problem with too much bass.
 
I remember those, about the "Synthesized Crossover Network" it seems to be related to the way the PCB and crossover circuit was conceived.
 
It looks like all my pics above disappeared due to photobucket gone crazy and start charging money for something other do for free. So I'm reposting pics in no particular order - ones I had here before in case it would be helpful for someone:

Jensenspeakerlineup.jpg

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R0012831.jpg

R0012833.jpg

R0012836.jpg

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Thanks for taking the time to repost your pics. :thumbsup:

No prob. - its been a total headache with photobucket making all pics disappear. I can see them making new rules for the new pics, but they should have kept old ones as they were. Of course, its all about the money for them and thats how they force some people to pay - to keep their old pic visible. I refuse - and have to go back and repost here and there. Anyway - this is off topic and just venting.
Back to Jensens - there are great speakers. I still have them and listen to them almost every day.
 
Another thanks for reposting your pics. The picture quality is quite nice and warm, by the way. Jensen speakers were very popular in the 1970s and went head-to-head against the other big boys in the industry. I always liked them.

As for PhotoBucket, they seem to have made the choice to effectively put themselves out of business by charging for their services in a free-hosting environment that they were largely responsible for creating. It's not nice to hold your customer's property for hostage. I'm glad I didn't have any irreplaceable photos entrusted to them.

GeeDeeEmm
 
i believe the whole thing with the "Synthesized Crossover Network" is simply a xover designed with a computer program, something that is commonplace today. Nice speakers btw!
 
I just finished restoringView attachment 1197730 View attachment 1197731 View attachment 1197733 a set of "System B" Jensens...Thank you for the spec sheet.....
Stan
I have a set of System Bs too but someone messed with the crossover and I'm looking for some info on capacitor and coils. Did you replace any of the caps?
I think this top picture is how the crossover should look.System B Crossover-4.JPG

And this is how mine looks. Several coils and caps have been removed and replaced with wire jumpers and the back side has a small cap, coil, and resistor added.
System B Crossover-JD.jpg
 
Nice Jensen's! Those woofers look like they can produce some serious bass. Always thought Jensen's bass drivers were spot on. Haven't listened to a vintage Jensen speaker from the sixties and seventies that I was dissatisfied with. I LOVE Jensen speakers form the 60's 70's and 80's. I have several pairs of Jensen speakers, I listen to them every day as well lol. Don't have a bad thing to say about any of them other than they are hard to find! I want more Jensens. What year are those speakers from? They look pretty serious like they can crank out the tunes. Also like the fact they are acoustic suspension speakers. Nice find!
 
Love the speakers... But what's goin on with the crossover?
Apparently Jensen put out the System B with 2 different crossovers. The one I have and the more robust one with all the spaces filled on the board. 3 extra inducers and 2 more caps. Now that I have a circuit diagram for the full crossover, I'm going to attempt to bring it back up to spec. Here on AK, I've seen two members with the full X-over and 2 like mine.
 
Hello guys! Very happy I found this post.
Hello to @Krosya, very very nice job you did on those Jensen 500 . Was wondering if you happen to know what is the model of the woofer number? Reason I'm asking is because I have a pair of the System 400, I believe they share the same same woofer, but in mine, the woofer has fried (not moving anymore) so I'm looking to find an original replacement. Or if anyone here would happen to have a spair, would love to put my hands on it.

Thanks lot in advance,

Cheers and hope you're all safe and sound out there.

Peace
 
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