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A friend gave me her audio system and some LPs. Pictured are the speakers which she says she has had since new. They have been re-foamed at least once. She said I was doing her a favor and knew I would appreciate them The receiver is a Marantz MR1155 and the turntable is a Dennon DP 51. This turntable works and sounds very nice and I think it's a keeper. I have some older Marantz receivers that are built way better than the MR1155.She is an artist and painted the speakers. Are they possibly worth restoring for the sound? In person the cabinets are quite unique as original art.
What do they mean by "plug into 117 Volts AC????
Thank you for any helpful comments.
Still spinnin'...
;^)
Edits: 05/31/17 05/31/17Follow Ups:
Get these
nt
Still spinnin'...
;^)
Oh -- now I see in the grill-off photo -- those aren't really Z-700's, since someone replaced the electrostatic elements with ordinary cone tweeters whose urethane foam surrounds long ago rotted. Sorry to say, they were fully converted into art pieces, and there's no reason to bother trying to use them as speakers.
Keep an eye out on ebay for a pair of the electrostatic panels. Be patient a pair will pop up eventually. At least that is what I would do. Well worth it.
High sensitivity, wide dynamic range, low distortion, and smooth frequency response. Pwk
http://www.itishifi.com
While those small cone drivers are complete guano, could something be cobbled together with dome and/or horn drivers that will function reasonably well? What sort of sensitivity is needed in the device(s) mated to the woofer?
Obviously, woodworking (to get a mirror imaged pair) and crossover engineering are going to be required. I haven't the foggiest notion about cost justifying such an effort. The quality of the cabinet and woofer have much to say about that subject.
Eli D.
I was starting to get excited about efforts to restore.
Still spinnin'...
;^)
The Janszen speakers are cool. I love her painting.I rather like the Janszen speakers. There is a pair I have my eye on. Do not plug into power outlet unless you have the panels. The electrocstatic speakers have been removed and replaced with two crappy speakers. Maybe find some on ebay. Just my 2 cents
High sensitivity, wide dynamic range, low distortion, and smooth frequency response. Pwk
http://www.itishifi.com
Edits: 06/02/17
J. S. Bach (A) was correct when he said sometimes the electroscatic speakers were replaced. Apparently that's what was done with these. I was curious that my friend had been using them without plugging into the wall so I popped the grill. Pics below. I was hoping otherwise but now I know. Cones look a bit dried out with some damage. Looks like the turntable (Dennon DP51) and LPs will get the most use from this gift.
A big thanks to all who responded with comments and suggestions.
Still spinnin'...
;^)
nt
all the best,
mrh
Very the much the case Green Lanern mentioned about another set of vintage speakers.
Naturally, I'm biased when it comes to stats. :)
This add shows good pictures of how the terminations should look for both the speaker and the 117v connections.
That's helpful. Thank you!
Still spinnin'...
;^)
...One, leave the cabinets alone as a tribute/"thank you" to your friend. Plus, I kind of like the artistic look.
Two, there is a possibility that at sometime the electrostatics were replaced with regular drivers so no line cords.
What dose the yellow sticker say?
Later Gator,
Dave
Millersound is still in business and doing quite well. I live not far from them and can vouch for their work as they did the surrounds on my AR9s.
The Marantz looks to be a later "Superscope" era model and you are probably correct on the build. I'm kinda jealous of your gift.
Edits: 06/01/17
...fell off one of the speakers. You pose a good question. I did not see the remnants of an electrical cord or where one would have gone. I'll take a closer look in the AM.
The friend who gave me the speakers is a fantastic artist. After getting her to sign the cabinets I would not think of touching them. It'll be a challenge to figure out how to get into the cabinets for any restoration without damaging them though.
Thanks!
Still spinnin'...
;^)
pull the woofers and see where the line cords went into the transformers for the electrostatic elements. Just replace the line cord and, while you are in there, replace any electrolytic caps. A little sanding of the box - or leave it as is, I kinda like it - and you will have a stone classic speaker there. Very good fortune.
Ashra -- those are the best of the series of large bookshelf speakers made by Neshaminy under license. Nice paint! They do require a connection to the wall AC, but it's missing from the one you show the back of. The speakers will not have any treble without this.
The cables in your picture are for connecting the speaker terminals to the receiver. Make sure you are consistent about which color goes to which post, e.g., red goes to +, black to -.
Someone has apparently clipped away the power cord. There may be enough of the original cord sticking out to splice in a new one. If not, someone will have to do a little surgery on them. At any rate, if you take these to a repair shop, it will not be hard to fix this aspect.
DavidJanszen - Thanks for the info. It was not at all clear when viewing the backs what the proper connection would be with 117 volts. Looks like I have a bit of a project on my hands. I'm looking forward to completion.
Thanks again!
Still spinnin'...
;^)
For what it's worth, those two little tweeters look like Peerless cones. Pretty good in their day which was late 60's early 70's. They got used in things like the Rectilinear III and Infinity 2001.
Good electrostatic panels need a polarizing voltage, hence the line cord and power supply. If the power supply has been removed, good luck.
Jerry
Her artistic endeavors don't appeal to me but that's OK.
I'm not familiar with the Z-700 but I fondly remember auditioning a pair of Janszens in the mid-70s. They were about the size enclosure of the Advent or AR-2. What I remembered most was hearing an LP by the Modern Jazz Quartet and being able to differentiate the various cymbals in the drum kit. I hadn't experienced that level of detail before, and still they were musical.
Page forward a few decades and that recollection influenced me to audition a pair of the current Janszens. Big surprise -- I bought them!
"The piano ain't got no wrong notes." Thelonious Monk
Looks like someone "cut the cord" on these. See the link -- should be old style lamp cords sprouting from the back of these.
Thanks for your response. Pictured is one of the cables. She had them hooked up to the receiver. I'm puzzled how to connect these and troubled that they might take out my amp. is that possible? I'm trying to find a manual on line now that explains the connection process.
Thanks again,
Still spinnin'...
;^)
Those are the cables to connect the speaker inputs to an amplifier. The cords that are missing in the photo connect to a 110V household socket. Each speaker needs its own to power up the built-in electrostatic bias circuits.
Thanks!
Still spinnin'...
;^)
they need AC mains voltage supply to drive their high voltage, low current (electrostatic) power supplies.
all the best,
mrh
Thanks for posting. The back of each speaker has only 2 posts for connection. Is there a separate step/up/down amplifier needed to power them? I can't use a regular stereo amp?
Tx,
Still spinnin'...
;^)
Is there a separate step/up/down amplifier needed to power them?
Step up transformers are used to generate the high voltage bias.
Electrostats tend to pose a more demanding load than most, but regular amps work just fine.
I use an Emotiva amp in the HT driving Acoustats and VTL tube amps in the main system driving the Sound Labs.
In other words, they're built to take a normal amplifier output (like the Quad ESLs, e.g.).
As others have said, well worth some investigation, time & effort. Not junk. Not at all. :-)
all the best,
mrh
Maybe I should approach someone who can tell me.
Thanks!
or much of anything for that matter.
all the best,
mrh
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