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MT121 revisited, revised
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UpComingSound View Drop Down
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Joined: 21 June 2006
Location: United States
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Points: 393 		Post Options Post Options   Thanks (0) Thanks(0)   Quote UpComingSound Quote  Post ReplyReply Direct Link To This Post Posted: 05 January 2013 at 4:35pm
If any one can help me out, question I just purchase the B&C 12pe32 for mt 121 and am using the ashley protea 4.8sp for crossover what should i set the cross over settings at ? HPF freq and LPF freq right now I have the HPF at 150 and LPF at 2000 is that a good xover setting?
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cravings View Drop Down
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Joined: 30 January 2007
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Points: 7363 		Post Options Post Options   Thanks (0) Thanks(0)   Quote cravings Quote  Post ReplyReply Direct Link To This Post Posted: 05 January 2013 at 4:51pm
can't get my MT121 12" sections to go much higher than about 900hz...
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pfly View Drop Down
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Joined: 25 October 2007
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Points: 2828 		Post Options Post Options   Thanks (0) Thanks(0)   Quote pfly Quote  Post ReplyReply Direct Link To This Post Posted: 06 January 2013 at 1:58pm
Slight update: I made a version with a space for horn and compression driver, the cutout I drew is for 18Sound 1,4 to 2 inch XR series horns but there is enough space for example JBL 2380 series of horns.

https://dl.dropbox.com/u/9726318/mt121/mt121_twoway.skp
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soundchippy View Drop Down
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Joined: 09 September 2011
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Points: 770 		Post Options Post Options   Thanks (0) Thanks(0)   Quote soundchippy Quote  Post ReplyReply Direct Link To This Post Posted: 06 January 2013 at 2:47pm
thanks plfy! i'm going to make it my summer project to finally build and test one of these.
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scss View Drop Down
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Joined: 07 February 2013
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Points: 35 		Post Options Post Options   Thanks (0) Thanks(0)   Quote scss Quote  Post ReplyReply Direct Link To This Post Posted: 03 April 2013 at 5:22pm
Does Anyone Know If The Fane Sov Pro 12-500 Will Fit / Work Well In This Cab?
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pfly View Drop Down
Old Croc
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Joined: 25 October 2007
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Points: 2828 		Post Options Post Options   Thanks (0) Thanks(0)   Quote pfly Quote  Post ReplyReply Direct Link To This Post Posted: 03 April 2014 at 6:07pm
Update from other thread:

Quote
https://dl.dropboxusercontent.com/u/9726318/mt121/mt121_twoway_VK_03.skp

Here is our current version of MT121 with cutout for XR2064 horn and with 157mm of depth available for 12" driver. Also included is some sort of mockup of connector panel with cutouts for 4 Neutrik STX series 4 and 8 pole Speakon connectors. Even though XR2064 is made out of aluminium, we are going to also build a support panel for compression driver.
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bozhidar View Drop Down
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Joined: 31 March 2014
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Points: 31 		Post Options Post Options   Thanks (0) Thanks(0)   Quote bozhidar Quote  Post ReplyReply Direct Link To This Post Posted: 07 March 2016 at 6:00am
Hello! The driver I want to put inside the single MT121 (without the horn) is 155 in total depth. How can I modify the back chamber to fit it in? How much space do I need between the magnet and the backdoor? Right now there is 145 MM from the baffle to the backdoor.
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Miles View Drop Down
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Joined: 26 September 2013
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Points: 76 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Miles Quote  Post ReplyReply Direct Link To This Post Posted: 19 August 2017 at 9:54am



4 mt121 bulit after the 15mm plan by forum member pfly - give thanks for providing the plan - first audio measurements and thing looking good!
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T-Bone View Drop Down
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Joined: 27 December 2005
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Points: 292 		Post Options Post Options   Thanks (0) Thanks(0)   Quote T-Bone Quote  Post ReplyReply Direct Link To This Post Posted: 23 August 2017 at 12:50am
The later 2 way version in 15 mm with CD top, isn't this MT121 40X25 degree dispersion? So I would need 4 per side for 160 degree splay?  I am thinking JBL 2386 2" horn with a JBL 2450 CD? 

Thanks for the input, 12PE32 is what I am going to use.
BASS, how low can you go!
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bob View Drop Down
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Joined: 30 July 2018
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Points: 1 		Post Options Post Options   Thanks (0) Thanks(0)   Quote bob Quote  Post ReplyReply Direct Link To This Post Posted: 30 July 2018 at 5:57pm
Hello,
can you please reupload the plan? Would be very helpful!
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Archi View Drop Down
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Joined: 24 February 2019
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Points: 19 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Archi Quote  Post ReplyReply Direct Link To This Post Posted: 01 June 2019 at 8:23am
Hi all, I've been lurking here for a while and ready to build MT121 next week
Lots of pics of MT121 has been removed or gone also the zip file in previous discuss , I need more information(like flare angles) before I start it.
Could anyone send me the file? I'll thank you thousand times!
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nejten View Drop Down
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Joined: 04 November 2019
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Points: 75 		Post Options Post Options   Thanks (0) Thanks(0)   Quote nejten Quote  Post ReplyReply Direct Link To This Post Posted: 15 March 2020 at 11:41pm
Hi everyone, I can't open any of the links posted. Can somebody help me with this? Bless
From small acorns oak trees grow.
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