Pete B

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Bump and discount over

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.

This should link to the factory specs in box: http://www.classicspeakerpages.net/IP.Board/index.php?/topic/10755-ar-10pi-woofer-problems/&tab=comments#comment-125861 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.

Tom, nice meeting you today, here is Carl's thread on his Super Mod: Hard to believe it was 2007, seems like yesterday.

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.

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?

A friend pointed this comp for Guru QM10s on Craig's List for $1199 used for the MKII version:

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.

@montyoldboy22 Where are you located anywhere near Connecticut?

Yes they are, I'll PM you

Bump to get this back on track, gorgeous $499 :

Bump, price drop to $599

Bump and price drop over

Bump

@claudel Any chance these are still available?

I take it those are 6.5" woofers? They look to be built on a standard US 6.5" frame. Maybe a 30 oz magnet? I wouldn't mind measuring a pair. A complete guess would be this, but it is not built on a US frame so dimensions would have to be checked, might be a good temporary fix or perhaps someone could retune the crossover to make them work fine: https://www.madisoundspeakerstore.com/silver-flute-woofers-6-7/silver-flute-w17rc38-04-ohm-6-1/2-wool-cone/

As far as I know Shoe Goop is butyl goop. Someone who needs some might want to experiment.

I was talking about the one on the left and if you read the thread I talk about removing the grille. I also have the one on the left that you sent but have not done anything with it.

I'm fairly certain that Jkent sent me a 12.5 years ago, did it have a buzz or something? Seem to remember measuring it and reporting T&S here somewhere. Seems it was the KLH-20 tweeter version that probably has a much stiffer spider for a higher Fs: http://www.classicspeakerpages.net/IP.Board/index.php?/topic/4238-klh-20-tweeter-dissection/

Thanks for all the info, it would be great to find out what was used originally. Save a sample from a blown 12.5 and perhaps a materials person might analyze it someday. I've been told that Shoe Goo and E6000 are the same product from the same company, no idea if this might work: http://eclecticproducts.com/downloads/tds-shoegoo-us-au-nz.pdf How to dilute it: https://www.rcgroups.com/forums/showthread.php?385740-Thinning-Shoe-Goo

I think that is true, you can watch the tweeter cone very closely and apply a 1.5V battery to the terminals, it should move out with + to the positive terminal. I've heard of people putting a 9V battery on this tweeter and seeing it move a LOT, but please don't do that.

Was the 12.5 similar to this also? https://www.madisoundspeakerstore.com/approx-4-fullrange/fostex-fe103en-4-full-range/?gclid=EAIaIQobChMI1ZqrvoDJ5AIVCZSzCh3XHwwSEAYYAiABEgJYvfD_BwE Open back full rangers like these usually have an Fs of 80 to 120 Hz. Sealed back Fs would probably be 200 to 500 Hz depending on how Kloss designed the system. I know, not very specific but if you measure Fs/Fc at 1 KHz something is probably wrong.