Is it worth to spend the money for dual mids and designing an MTM set up ?
I am using a Marchand Tube X over and thinking of running an MTM design.
Speakers will be a 3 way active
I am thinking ATC Dome mids that is
What are the benefits and is it worth the $$$$ to go with four mids ?
thanks Guys
Cheers
I am using a Marchand Tube X over and thinking of running an MTM design.
Speakers will be a 3 way active
I am thinking ATC Dome mids that is
What are the benefits and is it worth the $$$$ to go with four mids ?
thanks Guys
Cheers
Hi,
MTM mids with the ATC dome midrange is the dumbest idea I've heard in a long time
(And very expensive ...)
MTM only makes sense for 2 ways, not 3 ways, for 3 ways perhaps its BMTB that works.
(Smooths floor bounce issues in the bass, dual midranges are nearly always pointless.)
but many would still do a 3 way as BBMT.
Quite frankly the MTX IMO is a recipe for doing things incorrectly, and its hard to do right.
rgds, sreten.
MTM mids with the ATC dome midrange is the dumbest idea I've heard in a long time
(And very expensive ...)
MTM only makes sense for 2 ways, not 3 ways, for 3 ways perhaps its BMTB that works.
(Smooths floor bounce issues in the bass, dual midranges are nearly always pointless.)
but many would still do a 3 way as BBMT.
Quite frankly the MTX IMO is a recipe for doing things incorrectly, and its hard to do right.
rgds, sreten.
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Active XO is not a fix it all. Ideally ou want to get the drivers centre-to-centre within a 1/4 wavelength at the XO. Mid-to-tweet in an MT, Mid-to-mid in an MTM. This last means that, with say 6.5" bass drivers & allowance for a 3.5" bezel on the T, that an XO <400 Hz is required.
dave
Hello,
Lots of opinions, me too.
I use an open baffle 2 ½ way in the near field. I much prefer this to headphones for personal listening.
Yes Cal, for power handling and each is, closed cell foam neoprene gasket, mounted to the reinforced OB. There is much reduced vibration transferred to the baffle with two mids and closed cell rubber mounts.
Yes the vertical lobeing I believe is the reason the good doctor came up with the idea of MTM (the crossover is part of the magic) in the first place.
I believe the long aspect ratio of MTM helps with the pressure wave dispersion around the enclosure.
In the special case of the OB I also believe the long aspect ratio of MTM spreads out the frequency range of the mingling of the front and rear out of phase waves.
DT
All just for fun!
Lots of opinions, me too.
I use an open baffle 2 ½ way in the near field. I much prefer this to headphones for personal listening.
Yes Cal, for power handling and each is, closed cell foam neoprene gasket, mounted to the reinforced OB. There is much reduced vibration transferred to the baffle with two mids and closed cell rubber mounts.
Yes the vertical lobeing I believe is the reason the good doctor came up with the idea of MTM (the crossover is part of the magic) in the first place.
I believe the long aspect ratio of MTM helps with the pressure wave dispersion around the enclosure.
In the special case of the OB I also believe the long aspect ratio of MTM spreads out the frequency range of the mingling of the front and rear out of phase waves.
DT
All just for fun!
There is another advantage. Increased sensitivity of the midbass. Obviously not a major concern if the midbass and tweeter are close in levels but an advantage if the midbass of choice efficiency is lower, (in that the overall efficiency of the speaker will be higher than if the tweeter is attenuated to match the level of a single midbass).
also this abstract from D'appolito's paper on his version of this arangement.
Tony.
also this abstract from D'appolito's paper on his version of this arangement.
AES E-Library A Geometric Approach to Eliminating Lobing Error in Multiway Loudspeakers
Tony.
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The good doctor only popularized the idea and explained a rationale for the XO topology (which he has, in later designs not followed indicating to me that XO is flexible), he did not come up with the MTM arrangement.
dave
Hello,
As I said Opinion; a belief or judgment that rests on grounds insufficient to produce complete certainty.
The good doctor had the insight to understand, his name is on the paper. Big picture the doctor has the firmest grip (name association) on MTM. You knew who I was speaking of without saying the name.
DT
All just for fun!
Hello,
From my personal view of soundstage, imaging or closing my eyes and believing the illusion of being 3rd row center MTM’s work best.
A point source is held up as possibly being more accurate. A point source does not disappear in the space when you close your eyes it shouts here I am look at me.
DT
All just for fun!
From my personal view of soundstage, imaging or closing my eyes and believing the illusion of being 3rd row center MTM’s work best.
A point source is held up as possibly being more accurate. A point source does not disappear in the space when you close your eyes it shouts here I am look at me.
DT
All just for fun!
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