Pete B
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Posts posted by Pete B
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The early versions of the Paradigm Studio 100 had a pair of 8.5" woofers port tuned to
a very low 20 Hz. They have tremendous power handling around 20 Hz but could probably
use a little boost there to get the most out of them.
There was an excellent review many years ago in Audio magazine.
Here is another review:
https://www.stereophile.com/content/paradigm-reference-studio100-v2-loudspeaker-measurements
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I remember seeing that Peerless but it might have been very early production.
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The MGC-2 has a 12" woofer and 6" lower mid!
Do you know if the 4" mid was the same Peerless (KO40MRF) driver used in the MGC-1?
https://reconingspeakers.com/2011/11/07/peerless-k040-mrf-midrange-repair/
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I have a working pair for sale, do you still need them?
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I have a vague memory of seeing it could have been in the library here or perhaps there
was a patent?
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That makes sense to add the level controls.
It is interesting how different these are from the AR-11 for example that has 10 uF in the tweeter
circuit and a bigger inductor on the woofer. The midrange differences are expected since a
different mid driver is used.
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I'm not sure if I've ever seen the XO schematic.
You might ask Ken Kantor, or some of the experts on here. Please post it if you
find it.
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deleted duplicate post
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Thanks very much!ACOUSTIC SUSPENSION_Audio-1955-Jul.pdf
I used pdfSam (free program) to chop out the specific article.
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It would be interesting to compare the 58s and 91 crossover schematics in this thread if you
have them handy to post. I'm sure that they're around CSP somewhere.
Nice job on the rebuild and XO swap by the way!
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Anyone have the Magic Speaker .pdf that they could post here?
The link to Ken's download is dead.
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I always have trouble finding this historic article covering the design behind the AR-1 woofer
that started it all. I thought that there was a .pdf but have been unable to find it, here's a link
to it in the library here on CSP:
A few more links with background:
Some history at the AES:
http://www.aes.org/aeshc/docs/record.../villchur.html
Ed Villchur's patent covering his new invention, filed March 15, 1954:
http://www.google.com/patents/US2775309And another link here at CSP on a very fine AR-1 sample:
http://www.classicspeakerpages.net/IP.Board/index.php?/topic/8511-historic-ar-1/page/2/
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Forgot to mention that I have an unrestored spare 3rd speaker that I will include for parts.
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Bump and discount over
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Further down in this thread around 9/2018 I finally get good Vas measurements of the AR 12" woofer:
Your measurements look similar to mine.
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This should link to the factory specs in box:
The Q s are low because Fs is so low, and remember that most ARs use air core inductors with
fairly high DCR so this will raise the effective Qts. Your Fs spec is quite close to the 18 Hz factory spec.
Check for spider sag, this is important.
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Tom, nice meeting you today, here is Carl's thread on his Super Mod:
Hard to believe it was 2007, seems like yesterday.
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If you look at the 9th picture down it can be seen that the cap goes across the 2 lowest connections,
then one lead of the inductor is above, most likely the other inductor lead is also above on the other side.
In the 12th picture you can see the top resistor going across the driver terminals.
The 6th picture shows a wire running from the input terminal to the R, L anc C pins, then another
wire on the other side also going to RLC and back up to the output positive terminal.
It seems that the network is an RLC to the paired drivers with a resistor across them.
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The drivers look to be in parallel, refer to the crossover picture with the red and black
wires going to the drivers, there are jumpers in the rivets holding down the tabs for
the connectors.
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Where are these located, in case someone wants to pick them up and avoid shipping?
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A friend pointed this comp for Guru QM10s on Craig's List for $1199 used for the MKII v
ersion:
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Sorry I missed it, I have to keep in mind that it is only 1 hour for me to get there, for some reason I had 2 hrs in mind.
Deleted
in For sale / Wanted
Posted
Holiday Season price drop over