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Old 10th June 2013, 10:02 PM   #11
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Originally Posted by chrisb View Post
nostalgia time eh, Bob? you've come a long way since 2001
Yea. Once I heard the difference between a $100 driver and a $10 driver, I haven't looked back.

If the 40-1043 has a Qts anywhere near 1.0, there is zero chance of making it work in a TWQT. As I remember, the 40-1254a had a Qts somewhere around 0.5, and it works much better in a MLTL. A really high Qts driver needs to be in a OB or IB.

Bob
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Old 10th June 2013, 11:00 PM   #12
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Location: Mar del Plata, a BIG seasonal getaway city, can see the Ocean from our residence.
Since no one seems to have measured the T/S parameters of your particular driver, we are all in the dark. There seems to be some anecdotal data, nothing concrete, however there is the Eight Ounce magnet motor, not particularly good for Qes. I'm assuming your really not up to purchasing a T/S parameter device.....one used to determine the specs of your driver....because it'll cost ya!
Go right ahead & build a sealed enclosure.....my "guess", anecdotal dimensions would be 13.75 " by 17.25 " by 11 " Putting the driver offset at 33/66 on the Eleven inch panel.


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Old 10th June 2013, 11:14 PM   #13
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I'd consider putting lots of holes in the back of the cabinet, and adding a lot of stuffing, approaching some kind of aperiodic/dipole system.
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Old 11th June 2013, 04:00 AM   #14
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my earliest system was 4 or 6 eight inch full range drivers in each vertical pa column.
I replaced half of them with mid 90's rat shack 8" full ranges.

Probably not the best, but you could hear ac/dc or Bon Jovi while outside mowing the lawn !!!

Norman
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Old 11th June 2013, 06:37 AM   #15
kvaal is offline kvaal  Norway
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Quote:
Originally Posted by Bob Brines View Post
Yea. Once I heard the difference between a $100 driver and a $10 driver, I haven't looked back.

If the 40-1043 has a Qts anywhere near 1.0, there is zero chance of making it work in a TWQT. As I remember, the 40-1254a had a Qts somewhere around 0.5, and it works much better in a MLTL. A really high Qts driver needs to be in a OB or IB.

Bob
Well, that depends, I guess. I have drivers with approx 0.7 qts, but they are very sensitive, 96 dB. They work well in my tqwts.
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Old 12th June 2013, 01:51 AM   #16
Jsixis is offline Jsixis  United States
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I made a huge TWQT cabinet for my pair. They sounded nice, I left the whizzer in there but used about 5 grams of long fiber acoustic fluff, rolled slightly in my hands and gently pushed it behind the whizzer. That really cleaned them up especially around 1kz.
They were nice speakers, I fried the voice coils setting up a 5.1 amp.
pm me and I'll look up the dimensions.
I plan on buying a nicer pair of 8" full range for the cabs.
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Old 12th June 2013, 02:06 AM   #17
GM is online now GM  United States
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Please post the build in case someone else searches for a design.

GM
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Old 12th June 2013, 02:27 AM   #18
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the light cotton works behind the whizzer.
It did on my long ago B20's.
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Old 13th June 2013, 12:52 AM   #19
Jsixis is offline Jsixis  United States
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Please post the build in case someone else searches for a design.

GM
I will do that but it will be a few weeks as those cabs are in storage. I have some pictures somewhere. I plan on going to the storage area 2 weekends from now and I'll get the measurements.
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Old 13th June 2013, 01:18 AM   #20
GM is online now GM  United States
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Thanks!

GM
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