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TDA MT121 - HR Plots |
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levyte357- 
Old Croc 
Joined: 27 July 2012 Location: UK, South East Status: Offline Points: 8517 |
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 Posted: 03 April 2013 at 3:14pm |
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Indeed.. Somehow I had "incorrect" Driver Sd in T/S parms...  Cheers Dref. EDIT:But please explain Lrc value? Edited by levyte357- - 03 April 2013 at 3:16pm |
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MarjanM
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Joined: 10 February 2005 Location: Macedonia Status: Offline Points: 7845 |
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Posted: 03 April 2013 at 3:34pm |
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Lev, the TDA version will not be much different then the original. Difference will be in order of 1 db here and there. So whatever suits the MT will also suit the TDA version.
People have used lot of different 12 inches with various results but none was actually too bad. The main question is what will the HF driver be and how low it can go. Using a bit eq on the top part of the 12 inch response will not be too bad thing. |
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Marjan Milosevic
MM-Acoustics www.mm-acoustics.com https://www.facebook.com/pages/MM-Acoustics/608901282527713 |
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levyte357-
Old Croc
Joined: 27 July 2012 Location: UK, South East Status: Offline Points: 8517 |
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Posted: 03 April 2013 at 3:44pm |
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Have used quite a few drivers in TDA/Standard MT121, with good results. Trying to identify drivers, with better low mid response. |
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MarjanM
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Posted: 03 April 2013 at 4:00pm |
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You can not go wrong with 4550 man.
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Marjan Milosevic
MM-Acoustics www.mm-acoustics.com https://www.facebook.com/pages/MM-Acoustics/608901282527713 |
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levyte357-
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Joined: 27 July 2012 Location: UK, South East Status: Offline Points: 8517 |
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Posted: 03 April 2013 at 4:13pm |
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HF already sorted mate.. I only use 2" in MT121s. Need 12" driver that is flatter in response 200hz-400hz. |
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MarjanM
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Posted: 03 April 2013 at 4:16pm |
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There will be a peak at about 400Hz no mater which driver you use.
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Marjan Milosevic
MM-Acoustics www.mm-acoustics.com https://www.facebook.com/pages/MM-Acoustics/608901282527713 |
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levyte357-
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Posted: 03 April 2013 at 4:30pm |
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Assuming Dref plots are realistic, flattening peaks around 200/400 are not a problem. Problem is hornloaded kicks are mostly no good for low mid, so it's either get low mid from MT, or reflex kick cab. (For use on Scoop systems). Edited by levyte357- - 03 April 2013 at 4:31pm |
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boots-hifi
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Joined: 15 August 2011 Status: Offline Points: 2479 |
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Posted: 03 April 2013 at 4:37pm |
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 BMS 4550 and BMS 610N are the best combo for an MT. Thats what I loaded the MTs I bought from you with Lev and they play almost flat with no eq apart from that little dip at 500hz. Ill load up some plots from Smaart a bit later if you like? |
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levyte357-
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Posted: 03 April 2013 at 4:45pm |
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Would be great... Cheers. |
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DiscernAudio
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Joined: 08 June 2011 Location: Alabama Status: Offline Points: 541 |
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Posted: 03 April 2013 at 4:54pm |
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When in constant directivity mode, is hornresp aaveraging the response within the angle of the horn?
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DiscernAudio
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Posted: 03 April 2013 at 5:06pm |
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Or is it averaging from 0 - 90deg off axis?
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levyte357-
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Posted: 03 April 2013 at 5:10pm |
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Just modeled the B&C 12PE32, that many rage about, and it doesn't seem so hot 200-400hz.
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Dref wrote: