MTM or MT speakers

[maniacdavid]

I would like to build a pair of speakers. I have noticed that most people build just MT speakers. Is there a reason for this quality wise or is it purely financial?

I have done some searching on this site and have been unable to find a good comparison between MTM and MT speakers or why people choose one over the other.

This is the project I'm looking at (with the Vifa tweeters). I plan on building the cabinets myself and buying just the parts.
http://madisound.com/bigavkit.html

Is there a reason why I shouldn't build this speaker and build a MT speaker?

[newfinish]

sure you can go tmm ,tm works fine its just you have to also pad the tweeter a bit.so they play the same loudness.but I prefer tm or tmm,mtm would be my last choice check this out
http://www.zaphaudio.com/index.html

[planet10]

Originally posted by newfinish
sure you can go tmm ,tm works fine its just you have to also pad the tweeter a bit.so they play the same loudness.but I prefer tm or tmm,mtm would be my last choice check this out
http://www.zaphaudio.com/index.html

Given 2 Ms + 1 T, i'd be building a 2.5 way with the 2nd M (0.5 one) mounted on the back of the cabinet push-push)

One of the reasons is that with MT on the front you don't have to XO the T as low & as steep.

dave

[ocool_15]

I've been looking at doing the exact same thing! 2 woofers will go lower then a single. I have also seen tmm designs that have the 2nd one crossovered alot lower (~200Hz)and there just to extend the low end in a small box. I was looking at doing a MTMW but I think ill end up doing a tmw 1", 2.625" 5.25".

Any advantage in soundstage or upper(650Hz-5kHz) response?

[TerryO]

I've been looking at doing the exact same thing! 2 woofers will go lower then a single. I have also seen tmm designs that have the 2nd one crossovered alot lower (~200Hz)and there just to extend the low end in a small box. I was looking at doing a MTMW but I think ill end up doing a tmw 1", 2.625" 5.25".

Any advantage in soundstage or upper(650Hz-5kHz) response?
~~~~~~~~~~~~~~~~~~~~~~
Hi,
You should be aware that 2 woofers don't actually "go lower" than a single woofer, but you can bring it in, as several have mentioned, to correct for "baffle step". This is actually done to boost the responce at the frequency that the baffle step starts, but it really doesn't go any lower, just louder in the lowest frequencies.
As it's your dime and time, you can do anything you want to, but why are you using a "2.625" as a mid when you're only going with a 5.25 woofer? Seems like you're going to an awful lot of trouble for little, if any, gain. I'd suggest you go with a 2-way with a TW if you're going to use a 5.25 woofer (actually more of a mid-woofer).
Just my opinion of course, but whatever you decide on, good luck on your project.
Best Regards,
TerryO

[simon5]

I have a question in line with this topic.

Let say you do 5 MTMs for a home theater. Then you lay the center channel on the side to sit on the TV or something else. You get 5 channels with the same speakers and design so it's perfect.

Then we heard about line arrays which sound good only in vertical lines. Won't that center channel compromise the sound because it's like a small horizontal array vs a vertical array?

I guess a MMTMM would be even more trouble for a center channel?

Thanks.

[newfinish]

you have to make it standing up,any kind of center,tm,mt,tmm,mtm,etc....

[planet10]

Originally posted by simon5
Won't that center channel compromise the sound because it's like a small horizontal array vs a vertical array?

Sideways MTMs don't really work except that that is what the marketing department has pushed to the point that that is what everyone expects.

IMHO, the best centre channel is no centre channel.

dave

[francis varkey]

I have a question in line with this topic.

Let say you do 5 MTMs for a home theater. Then you lay the center channel on the side to sit on the TV or something else. You get 5 channels with the same speakers and design so it's perfect.

Then we heard about line arrays which sound good only in vertical lines. Won't that center channel compromise the sound because it's like a small horizontal array vs a vertical array?

I guess a MMTMM would be even more trouble for a center channel?"

Simon5,
When you have two identical sources firing in the same plane and phase, the sound would appear to originate from excatly the centre point between them. When you place the tweeter at this central point, you get something like a point source(High freq has more directivity too).
So MTM will seem to radiate from the T, regardless of the MTM being placed vertically or horizontally. The same is the case with MMTMM.
IMHO, MMTs or MTs will need to be placed all vertical or all horizontal.
Regards,
Francis

[newfinish]

http://www.verityaudio.com/
check their site its very detailed on how they do it.