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Author Topic: Dead Growler  (Read 4387 times)

Rick Scofield

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Dead Growler
« on: June 22, 2016, 01:15:21 pm »

After many (7-8) years of excellent subwoofer duty, my single Growler (2008-2009 model) has unfortunately given up the ghost. I've fed it "only the best organic" 1000-ish watts from either a PV2600 or Crest ProLite 2.0 for light bottom end reinforcement for a rock/pop cover band.

Discovered this past weekend that it would no longer make any sound. Worked fine without complaint the previous weekend, and has been personally and gently handled my me.

Double checked signal chain thru other speakers and isolated the problem to the Growler. (Boooo).

After contacting Jeff at JTR and confirming there is a replacement driver available, I pulled the hatch and removed the damaged driver expecting to see obvious broken something.

To my surprise the super beefy 12" woofer appears perfectly brand new and pristine. No burnt smell, perfectly supple surround and spider. Tinsel leads appear flawless. What I can see of the voice coil poking above the gap appears to be lovely bright copper. Cone moves smoothly and silently with zero rubbing.

Ohm meter across the leads reads infinity so I must have an open somewhere.

Apparently there are no available replacement (re-coning) parts for this driver according to Jeff.

I'll "happily" order the replacement driver which, according to JTR is a newer design that handles more power, but I hate to just dump this beautiful but damaged subwoofer driver in the trash.

Is there someplace I can take this little beast that's able to carefully dissect, repair, and reassemble it?  I'm 30 miles east of San Francisco.

Sage advice (or condolences) from my Labster friends is most appreciated.

-Rick
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David Allred

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Re: Dead Growler
« Reply #1 on: June 22, 2016, 02:13:28 pm »

Is it throw away because of the newer design, or was it always so?  If so, then wow!
The magnet has to have value.  If you have the driver spec, maybe you can find a cone to suit.

Mount the basket to your shop wall and use the magnet as a tool holder. 

Sad news
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Ivan Beaver

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Re: Dead Growler
« Reply #2 on: June 22, 2016, 06:24:49 pm »

Take it to a QUALITY speaker reconer.

There are several places that it might have "opened up".

Some of these can be fixed-depending on where they are.

I used to take pride in doing those sort of repairs-without have to do a full recone.

Some times it is where the tinsel leads connects to the voice coil wire.

Removal of the dust cap and a little scrapping away at the joint can give a place to test.

But you have to know what you are doing.

And then it could a break deep inside that just "broke".

Maybe a slight defect that was in the driver since day 1 and finally broke.

It does happen.

Not all failures are due to over power.
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A complex question is easily answered by a simple-easy to understand WRONG answer!

Ivan Beaver
Danley Sound Labs

PHYSICS- NOT FADS!

Rick Scofield

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Re: Dead Growler
« Reply #3 on: June 22, 2016, 07:42:58 pm »

Take it to a QUALITY speaker reconer.

There are several places that it might have "opened up".

Some of these can be fixed-depending on where they are.

I used to take pride in doing those sort of repairs-without have to do a full recone.

Some times it is where the tinsel leads connects to the voice coil wire.

Removal of the dust cap and a little scrapping away at the joint can give a place to test.

But you have to know what you are doing.

And then it could a break deep inside that just "broke".

Maybe a slight defect that was in the driver since day 1 and finally broke.

It does happen.

Not all failures are due to over power.

Ivan, your suggestion is EXACTLY what I'm hoping for. Actually had you in mind when posting. Just gotta find a high quality repair specialist. Ideally in Northern California.

Thanks for your input!
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Ivan Beaver

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Re: Dead Growler
« Reply #4 on: June 22, 2016, 11:11:09 pm »

Ivan, your suggestion is EXACTLY what I'm hoping for. Actually had you in mind when posting. Just gotta find a high quality repair specialist. Ideally in Northern California.

Thanks for your input!
What it takes is somebody that CARES about their customers, and not just wanting to "run it down the line" and do the normal repair.

I used to do a lot of vintage jukebox and radio repairs and "putting together" (ie rigging kits) for old Western Electric speakers and such.

To me, that was part of the fun, and the challenge.

Not as much money as a full recone-but much more satisfying. 

Maybe that is why my business failed-I was having to much fun and not paying attention to the business side of things.

That is why I stay away from the business side now :)  I don't want to kill somebody elses business
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A complex question is easily answered by a simple-easy to understand WRONG answer!

Ivan Beaver
Danley Sound Labs

PHYSICS- NOT FADS!

Stephen Kirby

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Re: Dead Growler
« Reply #5 on: June 23, 2016, 04:12:34 pm »

Maybe call A Broun Sound.  Haven't dealt with them personally other than buying one of their Tone Tubby speakers but I've heard good things.
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Rick Scofield

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Re: Dead Growler
« Reply #6 on: June 24, 2016, 12:10:44 am »

Maybe call A Broun Sound.  Haven't dealt with them personally other than buying one of their Tone Tubby speakers but I've heard good things.

Thanks Stephen, I have left them a message. Raul (I think it was he) at Third Ear suggested A Brown Sound as well.

In the meantime I ordered the replacement driver from Jeff at JTR. He has provided excellent service.
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Rick Scofield

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Re: Dead Growler
« Reply #7 on: June 27, 2016, 11:14:14 pm »

A Brown Sound

Well shucks, A Brown let me know that they wouldn't even want to touch the driver with no replacement parts available. Maybe I'll just try removing the dust cap myself and see if I can find something simple/stupid wrong.
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Ivan Beaver

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Re: Dead Growler
« Reply #8 on: June 28, 2016, 08:22:52 am »

Well shucks, A Brown let me know that they wouldn't even want to touch the driver with no replacement parts available. Maybe I'll just try removing the dust cap myself and see if I can find something simple/stupid wrong.
Take the dust cap off-then scrape off a little area of the glue where the voice coil wires are-not the lead in wires.

Do this on just 1 wire (your choice).

When you get to the wire-scrape off a tad of the insulation.

Now you have some points to measure DC resistance.

Measure several points, from each input terminal to the scraped part.

You may need to scrape the other wire to get a better idea if the break is in the coil itself or the connection of the lead in wires to the voice coil wires.
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A complex question is easily answered by a simple-easy to understand WRONG answer!

Ivan Beaver
Danley Sound Labs

PHYSICS- NOT FADS!

Rick Scofield

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Re: Dead Growler
« Reply #9 on: June 28, 2016, 09:14:44 pm »

Take the dust cap off-then scrape off a little area of the glue where the voice coil wires are-not the lead in wires.

Do this on just 1 wire (your choice).

When you get to the wire-scrape off a tad of the insulation.

Now you have some points to measure DC resistance.

Measure several points, from each input terminal to the scraped part.

You may need to scrape the other wire to get a better idea if the break is in the coil itself or the connection of the lead in wires to the voice coil wires.
Got the dust cap removed but no tinsel leads or other cool wires can be seen. So I peer thru the frame at the underside of the spider and that's when I see the burn mark.

Looks like I'm SOL. Replacement driver comes tomorrow. Just didn't want to toss this nice assembly.
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ProSoundWeb Community

Re: Dead Growler
« Reply #9 on: June 28, 2016, 09:14:44 pm »


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