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-   -   Looking for 10-inch speakers with a QTS 3.0 (http://www.diyaudio.com/forums/multi-way/235068-looking-10-inch-speakers-qts-3-0-a.html)

OMNIFEX 29th April 2013 04:55 PM

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?

whgeiger 30th April 2013 08:18 PM

QTS = 0.3 ?
 
Quote:

Originally Posted by OMNIFEX (Post 3472442)
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

cT equals piD 30th April 2013 11:43 PM

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

Ronion 1st May 2013 12:29 AM

A LIMP measured 10 incher with a very high Q? Just curious as to what you plan on doing with such a beast...

cT equals piD 1st May 2013 12:58 AM

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

Patrick Bateman 1st May 2013 01:00 AM

A dollar worth of resistors and some added mass will get you whatever QTS you want

OMNIFEX 1st May 2013 10:25 AM

Quote:

Originally Posted by whgeiger (Post 3474054)
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!

OMNIFEX 1st May 2013 10:38 AM

Quote:

Originally Posted by Ronion (Post 3474326)
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.

OMNIFEX 1st May 2013 10:57 AM

Quote:

Originally Posted by whgeiger (Post 3474054)
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 (Post 3474719)
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

whgeiger 1st May 2013 03:13 PM

A Lot More Than Just a High QTS
 
Quote:

Originally Posted by OMNIFEX (Post 3474745)
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:
http://www.diyaudio.com/forums/full-...ml#post2542069

WHG


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