TH-18 Flat to 35hz! (Xoc1's design) - Page 12 - diyAudio
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Old 16th June 2011, 04:42 AM   #111
Djim is offline Djim  Netherlands
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Quote:
Originally Posted by CRESCENDO View Post
What do you mean?
You can find the answer about the power compression in post #24 in the thread:C/E/X PA Flat to 30 (FT30) PA TH Awesomeness. If there are doubts about the Thiele-Small data I used for calculating Xmax [(Hvc-Hg) : 2]use this link
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Old 16th June 2011, 05:11 AM   #112
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Ah, that part of the reply. Yes, you did calculate that - my apologies. I kinda just copied and pasted what data requests you asked for a few pages back. It would also be cool to see how the manufacturer's numbers match up. So, distortion data may still be good to have...and does anyone know if there are any differences between the 8 ohm and 4 ohm versions of the 18SW115, besides resistance ? Would be nice to use the 4 ohm versions =)
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Old 16th June 2011, 05:14 AM   #113
Djim is offline Djim  Netherlands
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Yes, the 4 ohm gap height is also different and that is were the misunderstanding started...
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Old 16th June 2011, 05:33 AM   #114
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Not sure which driver is optimal (8 ohm or 4)... I'm away from the laptop, on my phone, at the moment I'll have a look when I get back.
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Old 16th June 2011, 05:46 AM   #115
Djim is offline Djim  Netherlands
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Both should be working in the Xoc1 fine although there could be a small difference in Group Delay. I haven't seen any PDF about the 4 ohm version but I'm working on it. Maybe Art has the Thiele-Small for the 4Ohm version since he uses them.
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Old 16th June 2011, 06:05 AM   #116
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Yes, that would be very helpful!
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Old 16th June 2011, 06:20 AM   #117
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Quote:
Originally Posted by m R g S r View Post
That's $2800 worth of drivers and about $4000 worth of amp power to drive them. What are you planning on using them for? Just curious...
I already have 12 Nos. of 3015LF in dual 15 ported cabs. They are good but not great. I could easily use these in the SS15 but I want them to go a little lower.

Already have 3 Nos. QSC4050HD amps and one more is on the way. 2 Nos. 5050 are part of the existent setup. 5050 is not as good for LF as they are for Mid frequencies. Hence, the idea is to run the 4050s bridged mode for each 18NLW9600(c) loaded TH18. 4 cabs should be sufficient for most mid to big sizw events. Ideally, I would like to get the sound that 6 Labsubs could put out, but then the weight, size and constraints of stage size/setup etc., would make me choose the TH18; I am not sure if 6 TH18s would come close to the ideal I am dreaming of?
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Old 16th June 2011, 06:32 AM   #118
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I'm not sure I've never heard a lab sub.

But the event I went to the other day had 4 stacks of speakers around the "dance floor" (this was an outdoor event in a parking lot) Each stack had (4) Martin audio ws218x subwoofers (2 18's per cabinet) So (32) 18's total with some serious power....needless to say the bass was pretty ridiculous!

Anyone want to model this TC sounds pro 5100?
TC Sounds Pro 5100 18" Neo Subwoofer Driver
xmax is kind of nutty at 31mm
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Old 16th June 2011, 10:29 AM   #119
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I already have, but didn't post it since the output didn't match up w/the dollars that driver costs Response did look good tho. I'll post it from my other (PC) laptop in a moment.
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Old 16th June 2011, 11:22 AM   #120
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Left: 18Sound 18LW2400 vs Pro 5100 (SPL)
Center: B&C 18SW115 vs Pro 5100 (SPL)
Right: B&C 18SW115 vs Pro 5100 (Group Delay)

(In Hornresp, the Pro 5100 reaches its AES power rating of 1000W way before xmax)
Attached Images
File Type: jpg SPL (1) Pro 5100 vs 18LW2400.jpg (84.6 KB, 1040 views)
File Type: jpg SPL (1) 18SW115 vs Pro 5100.jpg (85.9 KB, 1020 views)
File Type: jpg GD (1) 18SW115 vs Pro 5100.jpg (75.9 KB, 902 views)

Last edited by CRESCENDO; 16th June 2011 at 11:25 AM.
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