LTD-M18 Sub Build - Page 22 - AVS Forum
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post #631 of 640 Old 09-05-2014, 07:58 AM
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That little dip is nothing to worry about...especially that deep. the rest of the response smoothed out so it was a fair trade imo. I normally do not ever suggest mixing 2 alignments, especially for folks that do not measure the response. But being Jbrown is now a diy'er, I figured he is capable of making it work.
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post #632 of 640 Old 09-06-2014, 11:07 AM - Thread Starter
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John knowing how I would be even more limited going with two cabinets instead of one do you think it would even be possible to get the port tune down to 15-16hz with two cabinets?


You've already said that I should have too much trouble getting the single cabinet down to 16hz.
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post #633 of 640 Old 09-06-2014, 02:11 PM
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it all comes back to


- size of cab
- size of port (for air velocity)
- length of port (for first port resonance)
- tuning frequency


so with all that in the mix and a 16hz target, and a roughly 2.5" x 20" (x36" long) port to keep air speed half under control, it generally would be best to keep the cab to at least 11 cubic feet internal or so.

Listen. It's All Good.
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post #634 of 640 Old 09-06-2014, 02:14 PM
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my gut tells me that you don't need subs back there though.
some sort of absorber for low frequencies and some sort of tactile transducer are the 'vibes' that I'm getting.
I'm happy to assist though with any experiment though!

Listen. It's All Good.
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post #635 of 640 Old 09-06-2014, 02:24 PM
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Maybe I need to drop by and hear a few bass songs and movie clips.. Listening to mains every time I come over. Gtg was mostly funk sub. Can't remember exactly how your bass felt.
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post #636 of 640 Old 09-06-2014, 02:38 PM - Thread Starter
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Quote:
Originally Posted by LTD02 View Post
my gut tells me that you don't need subs back there though.
some sort of absorber for low frequencies and some sort of tactile transducer are the 'vibes' that I'm getting.
I'm happy to assist though with any experiment though!

I probably have a line on a used UXL-18 that was from the group buy. I think I'll probably build one ported cabinet to put back there. I'm partly doing it just for fun too but to also see if it helps smooth out the room response. I still plan on building some of those limp mass mode bass traps too to install in the back.

If the 5th driver doesn't do much I can always just sell it. I have a spare iNuke 6000 to power the fifth driver too so it's not like I need to go and buy a lot if stuff to make it happen either.
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post #637 of 640 Old 09-06-2014, 02:39 PM - Thread Starter
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LTD-M18 Sub Build

I also started to play around with my balanced 2x4 miniDSP, I really prefer it over the iNuke DSP!

I think I'm going to invest in the 10x10 model to be able to PEQ all 7 channels of my speaker!
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post #638 of 640 Old 09-07-2014, 02:09 PM
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as requested: uxl, 10 c.f., 16hz tune, no filters, 2200 watts, (not shown excursion peaks above tune at ~29 mm, which is fine)


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post #639 of 640 Old 09-08-2014, 06:14 AM
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Quote:
Originally Posted by jbrown15 View Post
I probably have a line on a used UXL-18 that was from the group buy. I think I'll probably build one ported cabinet to put back there. I'm partly doing it just for fun too but to also see if it helps smooth out the room response. I still plan on building some of those limp mass mode bass traps too to install in the back.

If the 5th driver doesn't do much I can always just sell it. I have a spare iNuke 6000 to power the fifth driver too so it's not like I need to go and buy a lot if stuff to make it happen either.
Can you tell us anything about the Limp Mass Mode bass traps? I have a bunch of Roxul Safe-N-Sound on order that I was planning to stack and cover with a nice fabric in the corners of my theater room as I had always heard that this was a cheaper, and good way of helping with my systems overall bass response, but, now that I have read this tread and how fiberglass absorption is not the way to go about this, I am highly confused and unsure what is the right way to go about this?
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post #640 of 640 Old 09-08-2014, 10:25 AM - Thread Starter
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Quote:
Originally Posted by Martycool007 View Post
Can you tell us anything about the Limp Mass Mode bass traps? I have a bunch of Roxul Safe-N-Sound on order that I was planning to stack and cover with a nice fabric in the corners of my theater room as I had always heard that this was a cheaper, and good way of helping with my systems overall bass response, but, now that I have read this tread and how fiberglass absorption is not the way to go about this, I am highly confused and unsure what is the right way to go about this?
Here's a good place for you to start.
http://www.gearslutz.com/board/bass-...absorbers.html
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