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Old 29th April 2013, 05:55 PM   #1
OMNIFEX is offline OMNIFEX  Jamaica
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Exclamation Looking for 10-inch speakers with a QTS 3.0

Right!

I have some old 10-inch Eminence drivers from the 1970's that offer a QTS of 3.028 (measured in LIMP). I pretty much destroyed 6 out of 8 around 20 years ago, and looking to find six 10-inch speakers that offer a QTS of 3.0 or greater.

As a QTS of 2.0 is not easily found moreso 3.0 these days, does anyone know of any old 10-inch speakers (brand, model number) that offers a QTS of 3.0 that I can look out for on Ebay?
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Old 30th April 2013, 09:18 PM   #2
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Default QTS = 0.3 ?

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Originally Posted by OMNIFEX View Post
Right!

I have some old 10-inch Eminence drivers from the 1970's that offer a QTS of 3.028 (measured in LIMP). I pretty much destroyed 6 out of 8 around 20 years ago, and looking to find six 10-inch speakers that offer a QTS of 3.0 or greater.

As a QTS of 2.0 is not easily found moreso 3.0 these days, does anyone know of any old 10-inch speakers (brand, model number) that offers a QTS of 3.0 that I can look out for on Ebay?
There are a lot of good 10" drivers out there. Replace all the ones you have if they exhibit a Qts = 3.0

WHG

Here is a good one: (QTS = 0.31)

McCauley.com : Products: Components > 6224: Specifications
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Old 1st May 2013, 12:43 AM   #3
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From Parts Express, there is a 10" woofer manufactured by GRS replacement speakers, Qts= 1,27. PE stock # 292-410, for cheap.

Connect an 8 Ohm resistor in-series with it to get an effective Q of about 3,0.

Why do you want such a relatively high value of Qts ?

-Hope that shipping to you from Ohio, US wouldn't be too expensive.

Regards,
Pete

Last edited by cT equals piD; 1st May 2013 at 12:47 AM.
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Old 1st May 2013, 01:29 AM   #4
Ronion is offline Ronion  United States
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A LIMP measured 10 incher with a very high Q? Just curious as to what you plan on doing with such a beast...
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Old 1st May 2013, 01:58 AM   #5
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Actually a much more sophisticated and better way to increase the effective Qts of the woofer would be to drive it with an amp that has source impedance equal to about 8 Ohm. An appropriate amp might be some tube amps or a transistor/IC amp can be modified to have any required source impedance. I haven't looked for one at all, but AFAIK, a commercial transistor/ IC amp with 8 Ohm source impedance (or about that) doesn't exist.

-Pete
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Old 1st May 2013, 02:00 AM   #6
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A dollar worth of resistors and some added mass will get you whatever QTS you want
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Old 1st May 2013, 11:25 AM   #7
OMNIFEX is offline OMNIFEX  Jamaica
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Quote:
Originally Posted by whgeiger View Post
There are a lot of good 10" drivers out there. Replace all the ones you have if they exhibit a Qts = 3.0

WHG

Here is a good one: (QTS = 0.31)

McCauley.com : Products: Components > 6224: Specifications
Excellent!
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Old 1st May 2013, 11:38 AM   #8
OMNIFEX is offline OMNIFEX  Jamaica
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Quote:
Originally Posted by Ronion View Post
A LIMP measured 10 incher with a very high Q? Just curious as to what you plan on doing with such a beast...
I am resurrecting a pair of old columns which consists of four tens per cabinet. It is interesting you would call it a beast when high Q's were common with loudspeakers in the 1980's - downwards.
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Old 1st May 2013, 11:57 AM   #9
OMNIFEX is offline OMNIFEX  Jamaica
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Quote:
Originally Posted by whgeiger View Post
There are a lot of good 10" drivers out there. Replace all the ones you have if they exhibit a Qts = 3.0

WHG

Here is a good one: (QTS = 0.31)

McCauley.com : Products: Components > 6224: Specifications
Quote:
Originally Posted by OMNIFEX View Post
Excellent!
Edit: I just noticed the decimal point is in the wrong location. I need a QTS of 3.0 not a QTS of 0.31
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Old 1st May 2013, 04:13 PM   #10
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Default A Lot More Than Just a High QTS

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Originally Posted by OMNIFEX View Post
Edit: I just noticed the decimal point is in the wrong location. I need a QTS of 3.0 not a QTS of 0.31

Read this:
OB Qts: how high is to high?

WHG

Last edited by whgeiger; 1st May 2013 at 04:27 PM. Reason: Change Title
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