WTMW Array Opinion

domtweaker · 9th July 2011, 02:40 PM

Does anyone have any experience with a WTMW alignment ??

X over points will be 150 /800/ 3800 hz

The bottom end bass is on the side of the cabinets WTMW on the front .

thank you to anyone who can shine any light on this topic

AllenB · 9th July 2011, 11:42 PM

Having two front woofers in that range will give you some control with floor/ceiling interactions.

domtweaker · 10th July 2011, 02:10 AM

No Downsides though ?

I was told that using two mids will be a bad thing to do Are woofers different ?

Much less directional for sure compared to tweeters and mids .

There are some companies that even use two tweeters like the top of the line
Von Schweikert Two mids , two tweeters and a super tweeter in the center.

AllenB · 10th July 2011, 02:34 AM

What disadvantage with dual mids were you told about? Certainly they are harder to do without measurement. There is a benefit to be had with lobing around the crossover point, if that's something you want. About the woofers, they'd have to be large to be directional at 800Hz, notwithstanding the interaction between the two. If it were me, I'd do some drawing and modelling the distances to the floor/ceiling for each woofer and compare phase etc.

domtweaker · 10th July 2011, 04:33 AM

I was told that MTM will not image as good as MT ?

Less Focus if MTM is used ? Therefore I am going to use One midrange only

Moondog55 · 10th July 2011, 06:02 AM

Doesn't having 3 XO points mean you are designing a 3.5 way ??
Problems only if the M is too big, MTM works extremely well for me when 140mm or smaller is used.
My MTM using 205mm has a very small sweet spot.

domtweaker · 10th July 2011, 01:37 PM

No I m doing a 4 way 15 , 2x10 , Mid , tweeter

Yes the small diam makes sense for sure .

The mids I am using are large magnets total around 180 mm ?

I think the single point source from the mid may work better though.

tinitus · 10th July 2011, 02:04 PM

Quote:

Originally Posted by Moondog55

Doesn't having 3 XO points mean you are designing a 3.5 way ??

electrically it could look like that
but should be considered a 4way if acoustic rolloff of the 10" matches that of the subwoofer

tinitus · 10th July 2011, 02:13 PM

Quote:

Originally Posted by domtweaker

X over points will be 150 /800/ 3800 hz

depending on the mid, I would think twice about xo points

with 10" woofers, I would let them roll off by themselves, acousticly
and adjust the 15" rolloff accordingly
might be anywhere betweeen 50hz to 100hz, active

800hz seems a bit high for a 10"
but as said, depends on your mid

did miss which midrange driver ?

domtweaker · 10th July 2011, 03:04 PM

they are Volt 2500 nice midbass units

9th July 2011, 02:40 PM	#1
domtweaker diyAudio Member Join Date: Jan 2006 Location: big city	WTMW Array Opinion Does anyone have any experience with a WTMW alignment ?? X over points will be 150 /800/ 3800 hz The bottom end bass is on the side of the cabinets WTMW on the front . thank you to anyone who can shine any light on this topic

10th July 2011, 06:02 AM	#6
Moondog55 diyAudio Member Join Date: Jun 2007 Location: Norlane; Geelong: Victoria: Australia	Doesn't having 3 XO points mean you are designing a 3.5 way ?? Problems only if the M is too big, MTM works extremely well for me when 140mm or smaller is used. My MTM using 205mm has a very small sweet spot. __________________ QUOTE" The more I know, the more I know, I know (insert maniacal laugh >here<) NOTHING"

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9th July 2011, 11:42 PM	#2
AllenB diyAudio Member Join Date: Oct 2008	Having two front woofers in that range will give you some control with floor/ceiling interactions.

10th July 2011, 02:10 AM	#3
domtweaker diyAudio Member Join Date: Jan 2006 Location: big city	No Downsides though ? I was told that using two mids will be a bad thing to do Are woofers different ? Much less directional for sure compared to tweeters and mids . There are some companies that even use two tweeters like the top of the line Von Schweikert Two mids , two tweeters and a super tweeter in the center.

10th July 2011, 02:34 AM	#4
AllenB diyAudio Member Join Date: Oct 2008	What disadvantage with dual mids were you told about? Certainly they are harder to do without measurement. There is a benefit to be had with lobing around the crossover point, if that's something you want. About the woofers, they'd have to be large to be directional at 800Hz, notwithstanding the interaction between the two. If it were me, I'd do some drawing and modelling the distances to the floor/ceiling for each woofer and compare phase etc.

10th July 2011, 04:33 AM	#5
domtweaker diyAudio Member Join Date: Jan 2006 Location: big city	I was told that MTM will not image as good as MT ? Less Focus if MTM is used ? Therefore I am going to use One midrange only

10th July 2011, 01:37 PM	#7
domtweaker diyAudio Member Join Date: Jan 2006 Location: big city	No I m doing a 4 way 15 , 2x10 , Mid , tweeter Yes the small diam makes sense for sure . The mids I am using are large magnets total around 180 mm ? I think the single point source from the mid may work better though.

10th July 2011, 03:04 PM	#10
domtweaker diyAudio Member Join Date: Jan 2006 Location: big city	they are Volt 2500 nice midbass units

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