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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 8th January 2009, 02:13 AM   #11
TwangBar is offline TwangBar  Canada
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tamariska - keep us updated with your progress. I would be very curious on see your results.
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Old 24th January 2009, 03:46 AM   #12
tamariska is offline tamariska  Indonesia
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Twangbar. Sorry for the slow respond. The project is still on developing stage - so it needs some time to run.

For woofer, finally i bought a pair of volt B2500 from solen. It costed around $800 a pair plus $250 shipping and $200 customs etc. Well quite expensive but i think its worth.

For tweeter, i realize R29.7000 here locally is still expensive at approx $800 a pair (discounted price), so for the budget sake i would change my mind on going with Seas Millenium T25CF002 or probably SS 9900. Can you advise which one is better?

So the configuration will be B2500 + SM75-150 (non s version 16 ohm) + T25CF002 (or SS 9900).

Cabinet will be tuned at 70L or so. Do you have such autocad design drawing with internal bracing (to follow to SCM50 model) ?> Thanks
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Old 25th January 2009, 02:47 PM   #13
TwangBar is offline TwangBar  Canada
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Tamariska - Sounds like you are well on your way. I used the Seas T25C003 - which is what I think ATC uses. It is the the non-ferrofluid version so it is a bit more efficient (91 db).... and not too expensive! Harbeth also uses this model so it must be good eh?

As for the SCM50 box - as stated elsewhere, the "50" denotes it's volume in liters. Also, I think I have read the their box is not internally braced... but I could be wrong. I think also that it is stuffed with insulation... so it may act more like a larger box. Anyway, bracing in my mind is always good..... maybe use the golden ratio for determining position?

My (modified Proac Studio Tower) box using the ATC woofer is 65L and is braced. I modified it by building a new front baffle out of 3 layers of 3/4" MDF and put in one brace between the mid and the woofer. I'll try and post a picture.

Cheers,
Twangbar
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Old 25th January 2009, 03:06 PM   #14
TwangBar is offline TwangBar  Canada
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Here are some pics of my SCM50 clone. The port looks ugly because I am still sorting out the tuning so I made it so I can remove it. The molten tower beside it is my Aleph 2 clone.
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File Type: jpg atc_clone_1.jpg (52.0 KB, 2015 views)
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Old 25th January 2009, 03:09 PM   #15
TwangBar is offline TwangBar  Canada
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Another picture. The bottom of the cabinet (under the baffle) is a separate cavity which you can fill with sand or lead.
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File Type: jpg atc_clone_2.jpg (60.8 KB, 1951 views)
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Old 25th January 2009, 03:14 PM   #16
TwangBar is offline TwangBar  Canada
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Another photo of the back. I have the mid and tweeter network mounted on the back for continuous tweeking..... the woofer network is in the cabinet.
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File Type: jpg atc_clone_back.jpg (54.7 KB, 1918 views)
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Old 26th January 2009, 07:22 AM   #17
scalero is offline scalero  Spain
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I Have a pair of photos inside ATC SCM 100
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File Type: jpg atc scm100front.jpg (90.4 KB, 1821 views)
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Old 26th January 2009, 07:24 AM   #18
scalero is offline scalero  Spain
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Now, inside
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File Type: jpg atc scm100inside1.jpg (87.1 KB, 1811 views)
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Old 26th January 2009, 07:28 AM   #19
scalero is offline scalero  Spain
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Another.
You can see the bitumen
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File Type: jpg atc scm100inside2.jpg (91.5 KB, 1262 views)
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Old 26th January 2009, 07:29 AM   #20
scalero is offline scalero  Spain
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Last photo
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File Type: jpg atc scm100inside3.jpg (86.1 KB, 1167 views)
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