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Thread: "There is no replacement for displacement" or is there? Reply to Thread
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  Topic Review (Newest First)
11-15-09 02:52 PM
Ryan Anderson
Re: "There is no replacement for displacement" or is there?

I've heard the finished sub was supposed to have a 3rd option for mouth location...but I assume with the mouth dimensions vs the sub's depth, it can't be located at the end, only on 1 of the large faces?
11-14-09 11:55 PM
myn
Re: "There is no replacement for displacement" or is there?

Quote:
sub_junkie wrote: View Post
Why would the cone be torn apart?
BIG 18" drivers are bad in horns because they can not deal with a very long horn throat with strong compression. Why? Because the compression in the throat becomes to great, and tears the woofer cone to shreds. Smaller drivers are inherently more rigid.
11-14-09 11:10 PM
sub_junkie
Re: "There is no replacement for displacement" or is there?

Why would the cone be torn apart?
11-14-09 10:58 PM
myn
Re: "There is no replacement for displacement" or is there?

The Mal-X's cone would be torn apart in a horn. It's not strong enough. Not to mention the displacement and depth of the Mal-X would hinder in the design working around the oversized rear cavity to house it.

The Mal-x is a great driver for traditional alignments but for a horn there are a lot better drivers available.

11-14-09 10:08 PM
sub_junkie
Re: "There is no replacement for displacement" or is there?

Hmm. How big would a horn have to be to house a Mal-X?
11-14-09 04:30 PM
fredk
Re: "There is no replacement for displacement" or is there?

'Cuz we smushed it into folded horn crumbs?

Looney. You are one of the few here with experience with a folded horn. I'm looking forward to your thoughts on your new sub vs the old folded horn. Do you have any plans of running them side by side for a day or two for comparison?
11-14-09 12:27 PM
looneybomber
Re: "There is no replacement for displacement" or is there?

Quote:
myn wrote: View Post
If you have ever heard a good quality horn you know exactly what I am talking about.
I do like folded horn sound, but do not like folded horn size. Why can't I eat my cake?
11-13-09 10:48 PM
fredk
Re: "There is no replacement for displacement" or is there?

Quote:
myn wrote: View Post
I never stated that. The THT does better overall below and above 20hz in contrast to my LLT in my media room.
Yeah, I went back and re-read the thread at AVS. I think I am mixing up different threads.

I always looked at the measurements on Bill's site and saw a drop off at 20 Hz. I figured those were in room measurements.
11-13-09 07:15 PM
myn
Re: "There is no replacement for displacement" or is there?

Quote:
fredk wrote: View Post
Above 20 Hz that is. Somewhere near the end he states that the LLTs hit harder for the below 20Hz stuff even though the two measure about the same in that range. He does have a lot of LLT woofage in his theater though...

The THT would be tempting to play with if I were not at the top of a 3 floor walkup building.
I never stated that. The THT does better overall below and above 20hz in contrast to my LLT in my media room.
11-13-09 07:00 PM
myn
Re: "There is no replacement for displacement" or is there?

Quote:
SteveCallas wrote: View Post
What mic and calibration file are you using? A horn subwoofer would have to be larger than even a large LLT to achieve similar low end linearity, let alone linearity down into the single digits. That response simply isn't possible unless you are using heavy EQ, which I don't believe you are.

Try reducing your spl and frequency scale, it may be hiding a lot of the story. Try a scale of 65db - 115db and 10-100hz.
Radio Shack Model 33-2055 Digital RS Meter with these correction values
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