TH-18 Flat to 35hz! (Xoc1's design) - Page 19

m R g S r · 22nd June 2011, 03:38 AM

Why didn't we make the brace come all the way out to the front of the mouth? Wouldn't that have helped with the deformation of the front part of the bottom panel?

TundraLTD · 22nd June 2011, 03:44 AM

The B&C 18SW115 hits Xmax @100watts over its rated power. While the 18Sound 18LW2400 hit Xmax near 477 watts well under its rated power and 5dB less than the B&C driver all out. If it only cost me $30 more for the B&C and I've got power to spare isn't it a no-brainer or am I missing something?

m R g S r · 03:50 AM

I got two 2400's for 680 shipped... What are the two 115's? I thought they were around $900 for two of them?
I've never heard the 18 sounds....I just got them based on reviews I've read on here, and because they were affordable. Wait where did you get the 61 volt figure? I thought they were good to much more than that...

Djim · 22nd June 2011, 03:52 AM

Quote:

Originally Posted by TundraLTD

The B&C 18SW115 hits Xmax @100watts over its rated power. While the 18Sound 18LW2400 hit Xmax near 477 watts well under its rated power and 5dB less than the B&C driver all out. If it only cost me $30 more for the B&C and I've got power to spare isn't it a no-brainer or am I missing something?

Nope, but for most people there is a 'little' bigger difference then 30$ between these drivers.

TundraLTD · 22nd June 2011, 04:02 AM

Yeah I can get the B&C's at wholesale through my old boss

TundraLTD · 04:23 AM

I ran Akabak sims with low and highpass filters to keep over excursion under control at low frequencies and those are the voltages I got to hit Xmax safely

Quote:

Originally Posted by m R g S r

I got two 2400's for 680 shipped... What are the two 115's? I thought they were around $900 for two of them?
I've never heard the 18 sounds....I just got them based on reviews I've read on here, and because they were affordable. Wait where did you get the 61 volt figure? I thought they were good to much more than that...

m R g S r · 22nd June 2011, 04:23 AM

hmm what filters did you use? (freq and slope?) because thats only 488 watts which doesn't seem like much at all....

Djim · 22nd June 2011, 04:42 AM

Quote:

Originally Posted by TundraLTD

I ran Akabak sims with low and highpass filters to keep over excursion under control at low frequencies and those are the voltages I got to hit Xmax safely

Your predicted excursion will not be reached in reality with the same amount of power and music signals.

TundraLTD · 22nd June 2011, 04:46 AM

24dB Highpass @28Hz, 48dB Lowpass @ 115Hz. The Lowpass can be whatever you like of course. Here are the excursion plots for both

18Sound

B&C

TundraLTD · 22nd June 2011, 04:48 AM

I understand that. But the B&C driver does have more potential output

Quote:

Originally Posted by Djim

Your predicted excursion will not be reached in reality with the same amount of power and music signals.

22nd June 2011, 03:47 AM	#183
m R g S r diyAudio Member Join Date: Jan 2011	I got two 2400's for 680 shipped... What are the two 115's? I thought they were around $900 for two of them? I've never heard the 18 sounds....I just got them based on reviews I've read on here, and because they were affordable. Wait where did you get the 61 volt figure? I thought they were good to much more than that... Last edited by m R g S r; 22nd June 2011 at 03:50 AM.

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22nd June 2011, 03:38 AM	#181
m R g S r diyAudio Member Join Date: Jan 2011	Why didn't we make the brace come all the way out to the front of the mouth? Wouldn't that have helped with the deformation of the front part of the bottom panel?

22nd June 2011, 03:44 AM	#182
TundraLTD diyAudio Member Join Date: Dec 2009	The B&C 18SW115 hits Xmax @100watts over its rated power. While the 18Sound 18LW2400 hit Xmax near 477 watts well under its rated power and 5dB less than the B&C driver all out. If it only cost me $30 more for the B&C and I've got power to spare isn't it a no-brainer or am I missing something?

22nd June 2011, 04:02 AM	#185
TundraLTD diyAudio Member Join Date: Dec 2009	Yeah I can get the B&C's at wholesale through my old boss

22nd June 2011, 04:23 AM	#187
m R g S r diyAudio Member Join Date: Jan 2011	hmm what filters did you use? (freq and slope?) because thats only 488 watts which doesn't seem like much at all....

22nd June 2011, 04:46 AM	#189
TundraLTD diyAudio Member Join Date: Dec 2009	24dB Highpass @28Hz, 48dB Lowpass @ 115Hz. The Lowpass can be whatever you like of course. Here are the excursion plots for both 18Sound B&C