Lower midrange for ATC SM75-150S - Page 5

TwangBar · 21st October 2007, 11:29 PM

I bought a used Proac Studio Tower a while back - which uses the ATC mid (16ohm - non-s version), the SB75-234 LC version and a SS tweeter.

It sounded pretty good, but my plan was to clone the ATC 50 (passive version).

I bought the Seas tweeter ATC use (T25-003) and re-constructed a heavy front baffle with the driver orientated as ATC had them (offset mid/tweeter to the bass driver).

Anyway, I did not mess around with the xover between the bass and mid (kept the original Proac design) but obviously had to modify for the new tweeter.

I am still in process... but it sounds great! The bass setup is a bit odd as the Proac design is based on a EBS design - which tends to be a natural sounding, but a little light weight.

For interest sake (I am always interested in designers who use ATC) a local company here in Ottawa has released a speaker using the ATC mid and a Mundorf tweeter!

http://www.tetraspeakers.com/pages/606.html

Thet say they cross it over at 1K!?!? Insane! (or it's a typo). And yes - they are using the S version.

ShinOBIWAN · 22nd October 2007, 02:12 AM

Quote:

Originally posted by TwangBar
Thet say they cross it over at 1K!?!? Insane! (or it's a typo). And yes - they are using the S version.

They say 1Khz and 3.5Khz are the crossing points. Not what I'd do with the ATC but is fine all the same.

newfinish · 30th April 2008, 11:46 PM

I haven't heard the atc yet but some tell me it's dynamic fast loud but is it musicaly rich?
does it tend to be lean because of the dynamics?

i was suggested the atc and the raal tweeter by solen,with the eton 11"x2, does anybody know what kind of xover slopes i will need?

ShinOBIWAN · 30th April 2008, 11:56 PM

Quote:

Originally posted by newfinish
I haven't heard the atc yet but some tell me it's dynamic fast loud but is it musicaly rich?
does it tend to be lean because of the dynamics?

i was suggested the atc and the raal tweeter by solen,with the eton 11"x2, does anybody know what kind of xover slopes i will need?

Musically rich? What's that?

The ATC mid plays what's on the recording, it doesn't suffer junk recordings. So its only musically rich when the source material is.

3-3.5Khz 4th order would work OK with the little RAAL 70-10 and 500hz highpass is the best place to start for lowest distortion on the ATC.

newfinish · 1st May 2008, 12:22 AM

lol
I'm not so good in describing music.

i know what you mean if the recording is good,and what i mean when the recording is good sometimes i heard speakers sound thin not rich like the good recording was on other speakers. i hesitate on the mid AT 5" or 6"or the ATC for that richness...but saw that your preferance was the atc like a lot of others here in the forum...

21st October 2007, 11:29 PM	#41
TwangBar diyAudio Member Join Date: Jan 2003 Location: Ottawa, Canada	A passive version I bought a used Proac Studio Tower a while back - which uses the ATC mid (16ohm - non-s version), the SB75-234 LC version and a SS tweeter. It sounded pretty good, but my plan was to clone the ATC 50 (passive version). I bought the Seas tweeter ATC use (T25-003) and re-constructed a heavy front baffle with the driver orientated as ATC had them (offset mid/tweeter to the bass driver). Anyway, I did not mess around with the xover between the bass and mid (kept the original Proac design) but obviously had to modify for the new tweeter. I am still in process... but it sounds great! The bass setup is a bit odd as the Proac design is based on a EBS design - which tends to be a natural sounding, but a little light weight. For interest sake (I am always interested in designers who use ATC) a local company here in Ottawa has released a speaker using the ATC mid and a Mundorf tweeter! http://www.tetraspeakers.com/pages/606.html Thet say they cross it over at 1K!?!? Insane! (or it's a typo). And yes - they are using the S version.

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30th April 2008, 11:46 PM	#43
newfinish diyAudio Member Join Date: Jul 2005 Location: Quebec	I haven't heard the atc yet but some tell me it's dynamic fast loud but is it musicaly rich? does it tend to be lean because of the dynamics? i was suggested the atc and the raal tweeter by solen,with the eton 11"x2, does anybody know what kind of xover slopes i will need?

1st May 2008, 12:22 AM	#45
newfinish diyAudio Member Join Date: Jul 2005 Location: Quebec	lol I'm not so good in describing music. i know what you mean if the recording is good,and what i mean when the recording is good sometimes i heard speakers sound thin not rich like the good recording was on other speakers. i hesitate on the mid AT 5" or 6"or the ATC for that richness...but saw that your preferance was the atc like a lot of others here in the forum...