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Old 12th September 2012, 01:45 PM   #1
H Burch is offline H Burch  United Kingdom
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Default no thiele small parameters

hey,
im going to build a small pa system but the drivers im going to use dont have thiele small parameters available. how important are these for pa use when ultimate sound quality isn't the most important factor?

thanks
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Old 12th September 2012, 07:39 PM   #2
tvrgeek is offline tvrgeek  United States
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T/S parameters are what you use to size the boxes and select the proper port alignment. Sealed is more tolerant. Building speakers without the ability to measure is usually not a happy experience. This is engineering.

If you described the drivers, maybe someone will have measured them, or at least some generalizations could be made.
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Old 12th September 2012, 10:30 PM   #3
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To measure drivers: Download ARTA: ARTA Your Page Title, Make this simple jig:
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File Type: jpg jig.jpg (14.0 KB, 142 views)
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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 12th September 2012, 11:47 PM   #4
winslow is offline winslow  United States
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What speakers? Someone out there might know something about them.
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Old 13th September 2012, 01:27 PM   #5
H Burch is offline H Burch  United Kingdom
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iv been looking into the monacor range. There is very little info about them on their own website and when i emaild they sent me same as on website! Usefull. I dont have the earth to spend on speakers but want decent quality.
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Old 13th September 2012, 02:03 PM   #6
winslow is offline winslow  United States
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Well most of the Monacor speakers are rebadged other brands.
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Old 14th September 2012, 10:10 PM   #7
H Burch is offline H Burch  United Kingdom
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any idea what speakers they are?
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Old 15th September 2012, 11:42 AM   #8
tvrgeek is offline tvrgeek  United States
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H,

You have not even identified which of their speakers you are looking at, nor have you apparently investigated being able to measure the drivers yourself. It's the weekend, get busy.

You also might look at their site again, I just looked up their 12 inch PA bass speaker and it has full parameters listed. ( SP12-200 )
MONACOR INTERNATIONAL : Product Detail Page
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Old 15th September 2012, 09:20 PM   #9
H Burch is offline H Burch  United Kingdom
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i would love to 'get busy' and measure these myself and have looked into how etc. BUT i dont have the equipment hence using this forum. I will post ones been looking at asap
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Old 15th September 2012, 11:59 PM   #10
tvrgeek is offline tvrgeek  United States
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Your computer does not have a sound card?
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