[TechAssist] Re: Acoustic Research speakers AR93Q, repair opinions please
- From: "Leonard G. Caillouet" <lcaillo@xxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 14 Feb 2002 12:33:15 -0500
Gary,
We replace surrounds all of the time. We get the surrounds from Dalbani for
under a dollar each. They only have standard sizes, however. You can get
kits for much more from someone, can't recall the company now, if you need a
custom size. I'm sure someone on the list recalls the company.
We use Wellbond, a water based glue. I like it because it dries slowly and
if you have to adjust the position of the surround you can before it sets.
Always check the voice coil travel in the gap to make sure that there is a
location where is travels freely. Some voice coils get trashed and you can
never get clear travel. If this is the case you need to have the whole
thing rebuilt-send it to Speaker Exchange in Tampa.
It is a tedious job but not really difficult. There are a few tricks.
First, glue the surround to the cone, carefully centering it useing the edge
of the cone as a guide. Let that dry overnight. Second, use a weight to
push the cone down until the spider is stretched tight but not too much. I
use a smaller driver turned facing down onto the coneto avoid crunching the
dust cap. This step causes the spider to center the voice coil in the gap,
which is what most people have trouble doing. Now, if you have the right
size surround, the surround will be pulled slightly over the inside edge of
the basket, lifting the outer edge of the surround so that you can run a
beed of glue under it. Let the glue get just slightly sticky, remove the
weight and the cone will come up. Let the glue set a bit more and check the
travel of the coil in the gap and make sure it does not rub. You might need
to shift it slightly to get clean travel. Some voice coils are tight in the
gap and it can be tricky.
Test after the glue sets and before applying the strips to the surround.
We charge $40.00 Labor + parts +materials per speaker.
Leonard G. Caillouet
Service Manager
Electronics World
Gainesville, FL
352-332-5608
352-332-5668 (fax)
----- Original Message -----
From: "Gary McCartney" <number63@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, February 13, 2002 8:48 PM
Subject: [TechAssist] Acoustic Research speakers AR93Q, repair opinions
please
>
> I have this pair of speakers come into the shop with foam surrounds
> desintegrated in all the woofers and midranges. They belong to a doctor
> who has given me the go ahead at $400.00 CDN
> guest-imate.
> I actually gave the price of $400.00 hoping to scare him off because I
> don't really feel like doing the job.(I'm not a speaker expert). Didn't
> expect him to say that he thought that was a fair price to repair and
> that the speakers are worth $1000.00 CDN.
>
> Ok, so now the problem. Are original parts available for these, and what
> cost? If not available, what are replacement options in keeping these
> sounding like original?
>
> The woofers are pn: 200035 (need 4 of them) and midranges are pn: 200036
> (need 2 of them)
>
> All speakers are 8". The woofers measure 8.6 ohm on my meter, or 4.3 ohm
> -2 in parallel. The midrange measures 8.6 ohm. I measure 5.4 ohm across
> the input terminals of the complete encloser.
>
> I have posted a web page to show the speakers and the cross over network
> schematic.
>
> http://www.number63.ca/speakers/speakers.html
>
>
> Another option: installing new surrounds. I have attempted this one
> other time and it was a flop. The surround I got was just a generic so
> maybe that is why. I think I would want proper surrounds to fit these
> speakers if I attempt it again. Any pointers in doing this?
> Are the surrounds available?
>
>
>
>
> Thanks for any suggestions in how to go about repairing these the best
> way.
> --
>
>
>
> Gary McCartney
>
> McCartney Electronics
> 7134 Fife Rd, RR 7
> Guelph Ontario Canada N1H 6J4
> Fax: (519)821-1530
> email: number63@xxxxxxxxxxxxx
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