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Multi-Way Conventional loudspeakers with crossovers

Clarity on Seas Thor Kit
Clarity on Seas Thor Kit
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Old 6th July 2006, 08:02 PM   #401
Virtalahde is offline Virtalahde  Finland
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Funny, I just experimented with thick cardboard frames around my 2-way Dynaudio near-fields.

I was really surprised - it felt like I was getting way more information from the recording. I think I might investigate wide baffles more in the quest of Accurate Mastering Speakers.
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Old 12th July 2006, 11:50 AM   #402
andrew01 is offline andrew01  Australia
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Any crossover gurus around ?
I want to substitute the T25CF002 with the T25CF001 ?
Would I need to make any changes or straight swap ?
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Old 12th July 2006, 03:15 PM   #403
imjatse is offline imjatse  United States
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I am far from a guru, but yes I think you would need to adjust the crossover. The two tweeters have slightly different responses, so you would need to move the crossover point to get back to a flatter response.

Also, the Fs of the T25CF002 is higher, so the crossover point would also need to be moved higher.

Here is some more information
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Old 18th July 2006, 04:45 PM   #404
jackinnj is offline jackinnj  United States
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Clarity on Seas Thor Kit
Beveled Wide Thor -- just before the sanding sealer is goes on -- well, it's not a Thor anymore -- filled up an entire shop-vac with MDF dust:

Click the image to open in full size.
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Old 18th July 2006, 04:48 PM   #405
Scottmoose is offline Scottmoose  United Kingdom
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Ominous.
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Old 18th July 2006, 08:25 PM   #406
imjatse is offline imjatse  United States
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nice looking boxes, let me give you my address and you can send them on over
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Old 18th July 2006, 08:49 PM   #407
jackinnj is offline jackinnj  United States
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Clarity on Seas Thor Kit
after i put the sanding sealer on I realized that the humidity is a trifle high today --

as you can see I didn't baffle the top edge -- the thought of all those compound angles was giving me a brain-ache -- I am told that this can be automatically "figured out" in Solidworks, or VirtualMill however.
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Old 18th July 2006, 09:00 PM   #408
Scottmoose is offline Scottmoose  United Kingdom
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I doubt it'd make much of a difference to be honest. There's a limit to the value of worrying about everything. In double blind tests, I've seen Wilson WATT / Puppy 7 owners fail to identify their beloved 20,00UK speaker from a clone costing ~2000. Draw your own conclusions.
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Old 14th August 2006, 07:45 PM   #409
jackinnj is offline jackinnj  United States
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Clarity on Seas Thor Kit
Well, here's a first test -- as #1 son hasn't yet picked up the DuPont Centari auto paint so these things are still MDF brown -- I ran a test in the back yard -- this is 1 watt, 1 meter -- obviously there's some adjusting that has to go on. FWIW the internal volume is around 5,100 cubic inches -- 36 inches long with a rhombic prism of approximately 141 square inches -- I used 0.35 #/ cu ft of polyester fill:

Click the image to open in full size.

when I cranked these babies up at 31.5kHz the crickets and cicadas started chirpin' their legs off:

Click the image to open in full size.

sorry, no anechoic chamber
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Old 14th August 2006, 08:18 PM   #410
imjatse is offline imjatse  United States
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Are you using the crossover that comes with the kit, or did you make/mod one?

Looking at the graph of the W18 it looks to me like the bottom end was really helped out. Looking back in time...

Back in this thread...

Your result seems to most closely match the fat thor with the slight ripple. FWIW fat thor's internal volume is about 6250 cu in.

And a stupid newbie question about measurement in general. After the cross over point moving up, aren't you really just measuring the tweeter's on axis response? Since the boxes and BSC wouldn't seem to matter. I noticed you cut your chart off at 1000 and was wondering if that was the reason.

And one more, what are you using to measure? I am close to finishing my short thors and wouldn't mind trying to get some simple numbers. I am curious to see about room gain as my living room is theater shaped. And mostly I just want to fidget.
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