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TDA MT121 vs Original MT121 |
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MarjanM 
Old Croc 
Joined: 10 February 2005 Location: Macedonia Status: Offline Points: 7845 |
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 Posted: 23 December 2011 at 1:53pm |
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So basically recommended crossover of 800-1000Hz is about right, isnt it? So i was right saying that going higher will just make it worse.
it might not sound bad to the ears having a small dip at 1.5KHz but still we aim for a flat response, aren't we?
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Marjan Milosevic
MM-Acoustics www.mm-acoustics.com https://www.facebook.com/pages/MM-Acoustics/608901282527713 |
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bee
Old Croc
Joined: 14 June 2011 Location: Middlesex Status: Offline Points: 4549 |
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Posted: 23 December 2011 at 2:47pm |
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this is true marjan, the highest you would want to cross them is 1.2khz with a bit of eq.... I ran 1 a side last week crossed at 1.2khz with the 2 inch comp from 1khz.. sounded very nice...... in real terms of use ability there is no differance in sound from the 2 versions..... only in the higher region which you will not be using......... In my view they are the best diy 12 inch horn there is, and ive build a few of the other diy plans for 12 inch horns....
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SebP
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Joined: 02 February 2010 Status: Offline Points: 127 |
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Posted: 24 December 2011 at 2:14am |
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Have compared MT121 and MT-130 with same driver (RCF L12P110K), I think they sound similar in term of levels and quality (perhaps MT-130 is more sensitive by a little) but for sure, MT-130 goes higher.
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TDA-Audio
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Joined: 11 February 2005 Location: Russian Federation Status: Offline Points: 294 |
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Posted: 16 January 2012 at 5:04am |
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\\\\\\recommended crossover of 800-1000Hz\\\\ 650-800hz , 4" VC driver -))) |
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horns plans http://photofile.ru/users/tda-audio/
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levyte357
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Joined: 10 May 2004 Location: UK, London Status: Offline Points: 11743 |
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Posted: 01 July 2012 at 2:40pm |
So with "small" amount of eq, same drivers, the 2x could be made to play the same, yes ? |
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"Who am I? I'm the guy who does his job.. You must be the other guy".
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MarjanM
Old Croc
Joined: 10 February 2005 Location: Macedonia Status: Offline Points: 7845 |
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Posted: 01 July 2012 at 10:28pm |
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Lev i dont think there will be much difference between this and the classic MT box.
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Marjan Milosevic
MM-Acoustics www.mm-acoustics.com https://www.facebook.com/pages/MM-Acoustics/608901282527713 |
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bee
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Joined: 14 June 2011 Location: Middlesex Status: Offline Points: 4549 |
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Posted: 01 July 2012 at 11:19pm |
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yes lev...... there is only a differance above 1.2k, but in most cases you will be crossing over before you would notice the differance between the 2......
from 150 to 1k they sound the same....
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Tweeter_Box
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Joined: 23 June 2012 Location: London Status: Offline Points: 859 |
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Posted: 16 July 2012 at 9:42pm |
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offtopic: what happens to the freq response and spl if you enlarge the driver chamber in the standard MT121 by say 40% ? keeping the horn the same
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bee
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Joined: 14 June 2011 Location: Middlesex Status: Offline Points: 4549 |
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Posted: 16 July 2012 at 10:17pm |
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may help to smooth it out a bit, but at the cost of spl.....
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Tweeter_Box
Young Croc
Joined: 23 June 2012 Location: London Status: Offline Points: 859 |
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Posted: 16 July 2012 at 10:35pm |
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cheers for that bee
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benergy
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Joined: 30 September 2013 Location: UK Status: Offline Points: 2 |
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Posted: 30 September 2013 at 4:43pm |
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Can Someone please send me a link to the original mt121 with curved flare. I cant find them anywhere and have been looking non stop. I can only find plans for simplified version.
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cravings
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Joined: 30 January 2007 Location: Ireland Status: Offline Points: 7507 |
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Posted: 30 September 2013 at 6:21pm |
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there was never one with a curved flare.
http://www.speakerplans.com/index.php?id=mt122 that's the mt122, an mt121 is when you only use a single 12" section, and whatever horn / driver combo above.` |
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bee wrote: