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Old 24th May 2009, 11:15 AM   #1
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Default Tannoy Monitor Gold trapezoidal cabinet

Hello,
Iíve recently bought a pair of 15Ē Tannoy Monitor Gold and I am going to build the cabinets for them.
Iíve read many documentation and I finally decided to build a 300 lt cabinet with four ports, each of 100mm diameter and 250mm length, starting from Peter Campbellís project (http://www.44bx.com/tannoy/mods.html)
I would like to make a trapezoidal cabinet as showed in the top view. The cabinet should be 142 cm height (136 internal). I would opt for 3 cm thick mdf panels.
Do you think that trapezoidal design would bring any real benefit?
The cabinet should be around 300 lt, but how to calculate it exactly?
Do you have any special advise for the project?
I am going to use 2 or 3 internal horizontal bracing panels to reduce vibrations.
Thanks for your help
Simone
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Old 24th May 2009, 11:16 AM   #2
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perspective
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Old 24th May 2009, 03:11 PM   #3
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Old 24th May 2009, 07:05 PM   #4
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I heard Peter's system several years ago when he was kind enough to invite me down for a listen. The speakers were considerably better than my Tannoys in either home made corner or Arden ported enclosures.

If the woodwork is not difficult for you, why not? However I'm not sure the smallish angle you're using will make all that much difference in reducing lateral standing waves.

To calculate the cab volume, you just need to do some basic trigonometry for the base shape and multiply it by the height. Don't forget to factor in the driver volume, say 6L for a 15" and the volume of any internal braces.

HTS Enclosure Volume Calculators
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Old 25th May 2009, 03:41 AM   #5
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check this out:

http://fullrangedriver.com/singledriver/DIYBX18.html
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Impedance varies with frequency, use impedance plots of your drivers and make crossover calculations using the actual impedance of the driver at the crossover frequency
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Old 25th May 2009, 01:20 PM   #6
Face is offline Face  United States
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Don't forget to update/upgrade the crossover while you're at it.
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Old 25th May 2009, 04:40 PM   #7
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Originally posted by Face
Don't forget to update/upgrade the crossover while you're at it.
Hi,
do you think it would be better?
how should I do it?
Simone
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Old 25th May 2009, 04:43 PM   #8
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Quote:
Originally posted by PeteMcK
check this out:

http://fullrangedriver.com/singledriver/DIYBX18.html
Thank you!
it's very similar in the deisgn but it's only 100 lt.
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Old 25th May 2009, 04:45 PM   #9
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Quote:
Originally posted by Brett
I heard Peter's system several years ago when he was kind enough to invite me down for a listen. The speakers were considerably better than my Tannoys in either home made corner or Arden ported enclosures.

If the woodwork is not difficult for you, why not? However I'm not sure the smallish angle you're using will make all that much difference in reducing lateral standing waves.

To calculate the cab volume, you just need to do some basic trigonometry for the base shape and multiply it by the height. Don't forget to factor in the driver volume, say 6L for a 15" and the volume of any internal braces.

HTS Enclosure Volume Calculators
Hi,
which angle would you suggest?
thanks for the link. Very useful. I guess I'll need to make it bigger..

Simone
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