TH-18 Flat to 35hz! (Xoc1's design) - Page 24 - diyAudio
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Old 27th June 2011, 12:01 AM   #231
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*The Lowpass filter is 24dB not 48 in the latest script, I forgot to change the notes
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Old 28th June 2011, 04:43 AM   #232
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Quote:
Originally Posted by m R g S r View Post
Anyone want to model this TC sounds pro 5100?
TC Sounds Pro 5100 18" Neo Subwoofer Driver
xmax is kind of nutty at 31mm
Here Ya go. 185V to hit 31mm (8500+ watts) well beyond its warranty rating, 115V for 19mm (3300w)

Click the image to open in full size.

Last edited by TundraLTD; 28th June 2011 at 04:51 AM.
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Old 28th June 2011, 01:33 PM   #233
tb46 is offline tb46  United States
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Default Post #230

Hi TundraLTD,

Geitmans use the viscosity entry to reflect lining (damping) used in his version of the SPUD. If I remember it right he readjusted the lining a number of times, and then adjusted the viscosity number to bring the simulation results in line with the measured results. Just thought you might find the method he use interesting.

Dual 8" tapped horn = TH-SPUD
Post #47 - lining example
Post #61 - script

Regards,
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Oliver
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Old 29th June 2011, 03:17 AM   #234
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I've been busy with work and other stuff, so I haven't had any time to finish these!
Here is a quick pic with the second side being fitted...
Click the image to open in full size.

I cut some handles in the back which really helps for tilting this back and rolling it around (i also fitted it with 210 lb casters...held on by (4) 1/4" bolts, double nuts to stop them from coming loose, and washers of course to help them from pulling through...if there is a problem i can make a backing plate for them out of steel)
Click the image to open in full size.

And here was a quick test i did just setting the stuff up between fixing two cars for my friend....it makes the ss15 look small and puny! aww! lol
Click the image to open in full size.

Still need to cut the main brace for the second cab, then work on the cross bracing (mouth bracing) for both cabinets. And the grill as well!

And of course i have to flush trim all the edges, sand, and paint to protect the wood somewhat!

Last edited by m R g S r; 29th June 2011 at 03:21 AM.
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Old 29th June 2011, 03:34 AM   #235
Djim is offline Djim  Netherlands
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Looks like you need some new tops... very soon
Very nice work

Last edited by Djim; 29th June 2011 at 03:36 AM.
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Old 29th June 2011, 03:37 AM   #236
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Well I just grabbed these because I honestly didn't think I could do better price wise DIY. I got the xti 2000, and the pair of JBL's with wires for 600...everything was in brand new condition!

I would love to do an active setup in the future if I have enough amp power....
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Old 29th June 2011, 03:44 AM   #237
Djim is offline Djim  Netherlands
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Quote:
Originally Posted by m R g S r View Post
Well I just grabbed these because I honestly didn't think I could do better price wise DIY. I got the xti 2000, and the pair of JBL's with wires for 600...everything was in brand new condition!

I would love to do an active setup in the future if I have enough amp power....
Very nice deal indeed! But what you build is.... well... you will soon hear them yourself and we demand a full report!
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Old 29th June 2011, 03:46 AM   #238
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I don't have anything to measure!

Initial testing without setting up ANY filters on the xti amps and i liked what i heard. i didn't blast it and i had the gains down, so we'll see once i have the right filters in place and group delay (i might need some help with that) etc etc! thanks btw!
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Old 29th June 2011, 03:57 AM   #239
Djim is offline Djim  Netherlands
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Cross at 70-80Hz with 5,8 mS for the tops or
120Hz with 10,8mS for the tops.
(165Hz-175Hz with 4,8mS for the tops is also possible)
Tundra calculated a setting for low-cut in post # 189: 24dB Highpass @ 28Hz

Last edited by Djim; 29th June 2011 at 04:00 AM.
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Old 29th June 2011, 05:43 AM   #240
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What keeps bothering me about thi sdesign, and I'd love it if someone can set my mind at ease... But, isn't the driver in the path of the presure wave of previous cycles? I.e. lets say a "positive" presure part of a wave arrives at the driver at the same time the cone is trying to move towards the magnet side, or the opposite scenario.
Also because of the time it took the wave to actualy reach the speaker, it is not the wave the speaker is busy produceing at that point (that's a guess, I'll be honest). If this is true, then there should be a time smear or modulation?

Please help me, I'll get no sleep now.
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