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Multi-Way Conventional loudspeakers with crossovers

original crossover schematics for clone ATC SCM 100
original crossover schematics for clone ATC SCM 100
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Old 9th May 2008, 11:28 AM   #1
scalero is offline scalero  Spain
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Default original crossover schematics for clone ATC SCM 100

Anybody has the original crossover schematics for ATC SCM 100 or 50?
I know they have impedance correction "up and down" and 12 db slopes "up and down in the 150s, but nothing about tweeter or bass.
Only know the croosover points 380, 3500.
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Old 2nd December 2008, 01:50 AM   #2
fabro is offline fabro  Slovenia
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i would like to see the original schematics too
but i didn't find them till now...
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Old 21st December 2008, 04:49 AM   #3
tamariska is offline tamariska  Indonesia
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I have got the XO from internet but I can't remember the site.
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File Type: gif atc scm50 scm100 crossover.gif (9.2 KB, 4177 views)
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Old 21st December 2008, 04:13 PM   #4
fabro is offline fabro  Slovenia
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thank you very much!
!!!!!

if you will remeber the site please let us know
tnxxx
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Old 24th December 2008, 03:11 PM   #5
scalero is offline scalero  Spain
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In this crossover, Is the vifa or seas Tweeter?
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Old 24th December 2008, 03:12 PM   #6
scalero is offline scalero  Spain
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I meat the vifa mod.
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Old 29th December 2008, 11:16 PM   #7
TwangBar is offline TwangBar  Canada
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Thanks for posting the xover. Would you happen to know if the mid is the 16 or 8 ohm version? I have an old pair of Proac Studio Towers which was their SCM50 take off - and they used the 16 ohm version of the mid.

Thanks.
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Old 30th December 2008, 06:53 AM   #8
Taco is offline Taco  Netherlands
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Quote:
Originally posted by TwangBar
Thanks for posting the xover. Would you happen to know if the mid is the 16 or 8 ohm version? I have an old pair of Proac Studio Towers which was their SCM50 take off - and they used the 16 ohm version of the mid.

Thanks.
Given the values of the components in the zobel and for the series inductor I would guess that it is the 8 Ohm version of the mid.
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Old 1st January 2009, 11:06 PM   #9
TwangBar is offline TwangBar  Canada
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For interest and comparison sakes, I am attaching the xover for the Proac Studio tower. This was an EBS design that was the precursor to the Response 4.
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File Type: jpg studio_tower_xover.jpg (75.8 KB, 3417 views)
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Old 7th January 2009, 10:00 PM   #10
tamariska is offline tamariska  Indonesia
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To my understanding the scm50 uses 8 ohm mid sm75 (s version). They are very expensive. Other than sensitivity, both are very high quality, have the same midrange purity and details. Very pleasing to ears.

I have had a pair of brand new 16 ohm of ( non s version of sm75-150 ). I wish to clone scm50 passive xo with different woofer & tweeter.

After being provoked reading the following old thread:

http://www.diyaudio.com/forums/showt...135&highlight=

i tempted to go with b2500. With massive magnets they look very high quality at least on par with sb75 or maybe better. Report mentioned it has well integrated with sm75 with slamm bass and very relealing on bad recording.

For tweeter i will use the famous ss revelator r2904/7000 because they are avalable in local shop, very expensive but still in a favourable with their discounted pricing.

I use lspcad for designing the xo (3 way passive).
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