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Chewit View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Chewit Quote  Post ReplyReply Direct Link To This Post Topic: MT121
    Posted: 18 May 2020 at 10:21am
Hey guy I’m getting some brand new MT121 tops! Was wondering what would be best to load them, from the diver to the horn? Thank 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote smoore Quote  Post ReplyReply Direct Link To This Post Posted: 18 May 2020 at 11:04am
b&c 12ndl76 or bms 12n610 get the best reviews it seems! Compression driver-wise depends how much you wanna spend. I think lots of people use bms 4554 or similar
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Jo bg Quote  Post ReplyReply Direct Link To This Post Posted: 18 May 2020 at 11:49am
I suggest if budget allows I would go to a 3 inches with 1.4 throat driver, 4554 even if 1.4 throat is just a 1.75 comp.
In my experience with mt121 this allowed to lower the crossover and get more uniform dispersion.
Good horns could be 18sound xt1464 if you plan more a side, or rcf 950 horn for one cab a side.
Good cheap comps could be 18sound nd1460 or rcf 950, the 1.4 exit version.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Jo bg Quote  Post ReplyReply Direct Link To This Post Posted: 18 May 2020 at 11:50am
Mating CD  to same manufacturer horn should help in get same exit angle and better performance.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Jo bg Quote  Post ReplyReply Direct Link To This Post Posted: 18 May 2020 at 11:52am
These are heavy, consider also splitting mids and highs in two boxes. The CD box can be very light.

Edited by Jo bg - 18 May 2020 at 11:52am
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Chris Grimshaw Quote  Post ReplyReply Direct Link To This Post Posted: 19 May 2020 at 12:50pm
Originally posted by Jo bg Jo bg wrote:

I suggest if budget allows I would go to a 3 inches with 1.4 throat driver, 4554 even if 1.4 throat is just a 1.75 comp.
In my experience with mt121 this allowed to lower the crossover and get more uniform dispersion.
Good horns could be 18sound xt1464 if you plan more a side, or rcf 950 horn for one cab a side.
Good cheap comps could be 18sound nd1460 or rcf 950, the 1.4 exit version.


Just a quick note that I use a pair of the 18Sound ND1460 in my main PA, and find them excellent.

Chris
Quality sound from Sheffield
www.grimshawaudio.com
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Post Options Post Options   Thanks (0) Thanks(0)   Quote levyte357- Quote  Post ReplyReply Direct Link To This Post Posted: 19 May 2020 at 12:56pm
For years my mate used B&C DE85 with expensive B&C ME75 Horn.

Replaced DE85, with Beyma CP750TI on same horn, and was vast improvement.

Beyma CP750TI on PAudio PH4525 2" horn, was also very impressive, and with flattening eq,had perceivable  content above 15khz.
"Gentlemen, you can't fight in here, this is the war room!!".
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Post Options Post Options   Thanks (0) Thanks(0)   Quote njw Quote  Post ReplyReply Direct Link To This Post Posted: 19 May 2020 at 6:43pm
Originally posted by Jo bg Jo bg wrote:

I suggest if budget allows I would go to a 3 inches with 1.4 throat driver, 4554 even if 1.4 throat is just a 1.75 comp.
In my experience with mt121 this allowed to lower the crossover and get more uniform dispersion.
Good horns could be 18sound xt1464 if you plan more a side, or rcf 950 horn for one cab a side.
Good cheap comps could be 18sound nd1460 or rcf 950, the 1.4 exit version.

 The 4554's may only have a 1.75" diaphragm but one of those is more than capable of keeping up with a horn loaded 12, if crossed at 1.2khz one will provide more than enough spl above a pair of horn loaded 12's and sound sweet doing it. The 4550 1" is actually identical bar the throat size and sounds sweeter at high frequencies but at the cost of some mid range spl.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote cravings Quote  Post ReplyReply Direct Link To This Post Posted: 19 May 2020 at 6:46pm
The 1.2khz is where that falls down for the mt121 though. Highest I can get my 12s is about 900.
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