Cheap 10inch woofer in tapped horn? what would you do? - Page 2 - diyAudio
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Old 31st December 2010, 09:35 PM   #11
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Quote:
Originally Posted by Brian Steele View Post
What brand/model are those drivers, and how much did they cost?
8zed

$AU35 each, which is about $US35

but, I don't think there are anymore available.

maybe the phase plug does nothing, but it looks cool
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Old 31st December 2010, 09:59 PM   #12
bjorno is offline bjorno  Sweden
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FYI:

b
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File Type: jpg TDWM-cont.JPG (737.4 KB, 558 views)
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Old 31st December 2010, 10:09 PM   #13
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thanks for that, but I'm a bit confused by the eg being 16?

65 watts into 4 ohm?

ah, but you did model it as half space, while I model mine as 8th space, as thats what I've measured horns to actually do in room
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Old 31st December 2010, 10:21 PM   #14
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I'm considering just doing the design in black and not worrying about 30Hz and below.

Click the image to open in full size.

same power as the grey line (which is your TQWT) in 8th space, with 1 watt.
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Old 1st January 2011, 04:28 PM   #15
bjorno is offline bjorno  Sweden
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Quote:
Originally Posted by ThyDntWntMusic View Post
I'm considering just doing the design in black and not worrying about 30Hz and below.

Click the image to open in full size.

same power as the grey line (which is your TQWT) in 8th space, with 1 watt.
Hi,

Sorry for neglecting the 30 Hz requirement: That is IMO, a better choice for your drivers than what I came up with . See the revised simulations for closer down to ~30 Hz and promising more improved SQ performance.

How do you know when your design are within 8th-space? See the 8th-space picture?

b
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File Type: jpg TDWM_music_cont.JPG (723.2 KB, 51 views)
File Type: jpg 8th_space.JPG (124.1 KB, 68 views)
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Old 1st January 2011, 11:08 PM   #16
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Quote:
Originally Posted by bjorno View Post

How do you know when your design are within 8th-space? See the 8th-space picture?

b
what do you mean by that?

I did quite like your first design, but I felt they were lacking the efficiency to reach 150dB

I was also trying to come up with a design that was simple enough to be a single fold, made from a 120cm wide piece of MDF...

I quickly scribbled this up, its not accurate, but was just a proposed idea... but to make four of these, each 4 times the height, is just a lot of work!

Click the image to open in full size.
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Old 2nd January 2011, 09:59 PM   #17
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might fold them something like this.

I don't really want to invert the woofers, so the throat will have to be larger than originally planned.. but it can still taper down to keep the frequency response reasonable.

Click the image to open in full size.
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Old 4th January 2011, 01:11 PM   #18
bjorno is offline bjorno  Sweden
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what do you mean by that?[/QUOTE]

IMO,You cannot count on 100% 8th-space boundary in-band gain for a realistic design to reach 150 dB/1m using all your drivers. I think at most would be around ~140 dB (Accompanied with lot of hear-able distortion and other artifacts included too, of course).

Quote:
I did quite like your first design, but I felt they were lacking the efficiency to reach 150dB
I try to support SQ in my designs and for home environment: I would never endorse SPL levels that would permanent injure a listeners ears.

b
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Old 4th January 2011, 02:18 PM   #19
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its not even worth the effort for only 140dB.
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Old 4th January 2011, 08:16 PM   #20
tb46 is offline tb46  United States
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Default ...its not even worth the effort for only 140dB.

Tactile audio for the deaf, what a concept.

Noise-induced hearing loss - Wikipedia, the free encyclopedia

Decibel (Loudness) Comparison Chart

Dangerous Decibels How Loud is Too Loud?

Have fun with that,
Regards,
__________________
Oliver

Last edited by tb46; 4th January 2011 at 08:25 PM.
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