Mark Audio CHR-70 Application Thread - Page 32 - diyAudio
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Old 22nd December 2009, 10:36 AM   #311
Henkjan is offline Henkjan  Netherlands
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I also showed it in another thread, but I thought I list it here as well, a TQWT floorstander with the CHR70: the Torretta.
b_13192.jpg
design by RumoH Zelfbouw Luidsprekers

It does not need any filter, so full range pure music

here is the plan:
TORRETTA tqwt.JPG
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Old 22nd December 2009, 06:28 PM   #312
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Henkjan,

What is the material thickness on those?

dave
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Old 22nd December 2009, 07:00 PM   #313
jleaman is offline jleaman  Belgium
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I'm pretty attracted to these gold colored drivers, mated with a nice ribbon tweeter.
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Old 22nd December 2009, 07:10 PM   #314
chrisb is online now chrisb  Canada
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Quote:
Originally Posted by jleaman View Post
I'm pretty attracted to these gold colored drivers, mated with a nice ribbon tweeter.
If you haven't heard the CHR70 or Alpair 5 or 6's, you might find you don't need a tweeter, although the smaller drivers could definitely benefit from woofers.
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Old 22nd December 2009, 07:30 PM   #315
jleaman is offline jleaman  Belgium
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Quote:
Originally Posted by chrisb View Post
If you haven't heard the CHR70 or Alpair 5 or 6's, you might find you don't need a tweeter, although the smaller drivers could definitely benefit from woofers.
Thanks chris, id like a 5" - 6" driver tho, and my tweeter on top, or in the cabinet really close to the top.

The last set of Fostex i listened to i really like, however I had to teach my self to sit still and sit in the exact spot for the driver to sound good, as the ( highs ) were projected in a certain degree, so thus adding a tweeter for me helped.
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Old 30th December 2009, 02:00 PM   #316
joern is offline joern  Europe
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Hi

another type of enclosure for the CHR70 (BR 8 liter):

Click the image to open in full size.

look inside (before damping wool)
Click the image to open in full size.

Inside:
13cmx24cmx28cm (high) about 8,7liters

Minus BR-Chanel etc. it is netto 8 Liter

BR-Channel: 13cmx1,3cm, and 16m long.

Runs down to 50hz, needs lot of damping wool (for BR), all wall covered with "damping10" (felt 10mm)

without any BSC ... just pur music

Try it wtith LINN Classic Music (old stereo-version) LINN K20,
works fine.

Last edited by joern; 30th December 2009 at 02:12 PM.
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Old 30th December 2009, 04:06 PM   #317
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Excellent work Joern! Glad to see more people enjoying these drivers as much as I do!
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Old 30th December 2009, 04:37 PM   #318
joern is offline joern  Europe
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Quote:
Originally Posted by italynstylion View Post
Excellent work Joern! Glad to see more people enjoying these drivers as much as I do!
thanks !

here is a simulation from ajhorn:
Click the image to open in full size.

on first view about 5bd "to much" in the bass.....
this kompensates the baffle step very well.

nice little driver...
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Old 6th January 2010, 11:00 PM   #319
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Hi joern,

Is this your own design?
How does it sound?
Have you a detailed drawing?
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Old 14th January 2010, 10:05 AM   #320
joern is offline joern  Europe
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Quote:
Originally Posted by edba2000 View Post
Hi joern,

Is this your own design?
How does it sound?
Have you a detailed drawing?
Hi

yes, thats my own design.

here is a description and plans:
http://img130.yfrog.com/i/chr70istmasboxtext.pdf/

Allthough its is in german, the simulation-grafs, pics and the plans will speak for itself.

try it... best by interms of "money for value", I agree with ithe discription in this thread:
Alpair 6 impressions. Question for Alpair7 or Alpair12 owners

try this little drive and hve fun !

Last edited by joern; 14th January 2010 at 10:07 AM.
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