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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 20th November 2017, 12:33 PM   #161
frede4500 is offline frede4500
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Quote:
Originally Posted by frede4500 View Post
no i got all drivers and filters from atc ,filters are upgraded with Jantzen silver z caps and superes resistors ,with that upgrade it sounds better than the active versions
i have all the Pictures from the project here Tube artisans - Photos | Facebook
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Old 20th November 2017, 12:41 PM   #162
frede4500 is offline frede4500
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Originally Posted by hugo stiglitz View Post
You're lucky.. they don't do that anymore nowadays.
Would you mind to share pictures? Maybe you even have schematics of this?
Highly appriciated
when i have the time ,i will take the filters out of the speaker ,and make schematis for the scm100 and the scm50
the twetters can you bye from atc ,they released their own tweeter not long ago
so a lot of the old seas/atc twetters must be out there for sale
i will upgrade my seas/atc twetters to the new ones
and put them up for sale second hand ,sometime next year
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Old 20th November 2017, 06:40 PM   #163
hugo stiglitz is offline hugo stiglitz  Germany
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Quote:
Originally Posted by frede4500 View Post
the twetters can you bye from atc ,they released their own tweeter not long ago
I know that they released their own tweeter recently, however ATC is not selling them.
only if you're customer and have a pair of ATC speakers already.
but not for DIY nor OEM
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Old 24th September 2018, 09:27 PM   #164
Gibalok is offline Gibalok  Russian Federation
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Hello, Im new to the forum and seems that is the most advanced place to have the right expert advice.

Recently I changed my beloved 50s passive to 100 passive and that was actully a blind change with a short overview with my fellow.

After getting 100s at home from the first sounds I noticed that the sound signature is completely different from what I heard in 50s. The sound is bright in HF and MF and lack of bass region. Actually i dont heare punch and oomph even in the size of 50's. I think that there is problem in 100-300 hz region.

1-2 days after i decided to check crossovers and found some unpleasant view.

Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.

I even cant imagine what happened to these wonderfull and expensive speakers. But I decided not to give up and restore it and keep it.

1) First off all im trying to get original crossovers to the speakers. They produced in 2011
2) Its hard to look at bass drivers S/N to check are they original (from these speakers) or they installed later after some problem. The S/N of speakers are 5278, 5279 - Are all bass drivers have the same specs and impedance.. means that I can order just ordinary crossovers?
3) I took out HF drivers and sent the request to SEAS to check that they are also original drivers installed to my ATC100 or also changed. Their S/N are E000606-2411231 and E000606-2411232
4) I can not get out MF drivers to check their S/N

So my big concern is whether stock crossover will help? Are all drivers have the same impedance and i should not care about it?

Thank you a lot for your opinions.
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Old 25th September 2018, 12:01 AM   #165
analog_sa is offline analog_sa  Europe
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original crossover schematics for clone ATC SCM 100
Quote:
Originally Posted by Gibalok View Post

1-2 days after i decided to check crossovers and found some unpleasant view.

So, what is so unpleasant? Do you mean the blackening of the board around the 3R3 resistor? Does not look serious.
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Old 25th September 2018, 05:49 AM   #166
Gibalok is offline Gibalok  Russian Federation
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Originally Posted by analog_sa View Post
So, what is so unpleasant? Do you mean the blackening of the board around the 3R3 resistor? Does not look serious.
You mean it doesnt affect sound ?
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Old 25th September 2018, 04:00 PM   #167
Gibalok is offline Gibalok  Russian Federation
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could anybody please provide original scheme for AT100 with SEAS HF drivers effective in 2011 year.
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Old 25th September 2018, 11:19 PM   #168
analog_sa is offline analog_sa  Europe
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original crossover schematics for clone ATC SCM 100
Quote:
Originally Posted by Gibalok View Post
You mean it doesnt affect sound ?
That i cannot say from looking at the picture. If the resistor is indeed the source of the black soot measure it and replace.

It is just a resistor and not even a nice one. What better excuse to upgrade all the resistors to something decent like Mundorf or Caddock?

Otoh, if the resistor was so severely overloaded it seems unlikely the dome midranges walked away unscathed.

IMO the crossover is easy to check and repair if needed, as the resistors are the only parts that can possibly fail.
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Old 26th September 2018, 08:38 PM   #169
Gibalok is offline Gibalok  Russian Federation
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Originally Posted by analog_sa View Post
That i cannot say from looking at the picture. If the resistor is indeed the source of the black soot measure it and replace.

It is just a resistor and not even a nice one. What better excuse to upgrade all the resistors to something decent like Mundorf or Caddock?

Otoh, if the resistor was so severely overloaded it seems unlikely the dome midranges walked away unscathed.

IMO the crossover is easy to check and repair if needed, as the resistors are the only parts that can possibly fail.
thank you. Hopefullu shortly I will measure the drivers and crossovers.

How to be sure that the drivers are OK? impedance?
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Old 26th September 2018, 08:40 PM   #170
Gibalok is offline Gibalok  Russian Federation
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And one more offtop question. The bass driver 12" have some marks it seems that somebody used a wet cloth.. are there any liquid/spray to restore original glossy surface?
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