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Old 13th January 2007, 01:55 AM   #1
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Default Rebuilding crossovers from old ADS speakers

I'm trying to rebuild the xovers from a set of old ADS L810 speakers. The crossovers components are on a proprietary circuit board with copper traces. The problem is that one of the boards was snapped in two in a fall. So I'm trying to put the components on another board.

I saw that Parts Express has some pre-fab crossover circuit boards for second-order three-way designs. But I can't tell if I'll be able to arrange my components on the board to match the schematic of my existing crossover. For example, the schematic calls for an inductor, resistor, and cap wired in series from positive to ground. But the PE board seems to want to connect them cap-resistor-inductor.

Am I being dense or is there more than one way to arrange the parts on the board? Does it matter the order in which the parts are connected?
Would anyone out there be so kind as to take a look at both the schematic and the PE board drawing and let me know if this is possible? I'm stuck and I need help. Thanks for any advice.

Steve (Nooooooobie)
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Old 13th January 2007, 02:04 AM   #2
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Items in series are the same no matter what order they're in. However, it's unlikely a generic board will match the ADS crossover.
You'll probably find it easier to match the broken pieces of the circuit board together and bridge any broken traces by soldering wires across the breaks.

Grey
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Old 14th January 2007, 02:44 PM   #3
TerryO is offline TerryO  United States
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I agree with Gray. The ADS speakers were, and are, very, very good even by today's standards. I would concentrate on restoring the existing crossover bd. and definately forget the generic Bd. They are not the same and won't give you what you want.

A couple of thoughts.

1. If you have "Mod Fever" sell the ADS speakers just the way they are (to those in the know, they're worth more intact with the broken bd. than they will be with the generic bd.) and buy some Insignia speakers to play with.

2. Restore the original board as Gray mentioned and be confident that your ADS speakers are far superior to what most, or all, of your friends own. They may be the best speakers you'll ever own.

3. Do a search on the "vintage" part of this or other forums and I think you'll find a lot of praise for the old ADS designs.

Best Regards,
TerryO
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Old 15th January 2007, 01:56 AM   #4
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http://cgi.ebay.com/2-German-Braun-A...QQcmdZViewItem
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Old 16th January 2007, 05:25 PM   #5
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Default Rebuilding crossovers from old ADS speakers

Thanks for everyone's advice. I decided that I wasn't up to the challenge. Meniscus Audio is rebuilding them entirely with upgraded components. For the price, the guaranteed results are definitely worth it.

S,
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Old 17th January 2007, 03:26 AM   #6
TerryO is offline TerryO  United States
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I didn't think to suggest something like that, but that should give you excellent results. I really believe that the ADS speakers are underrated. It may be that many people have never heard them, they were fairly pricey when they being manufactured. They should, IMO, be on any list of classic speakers and with the bonus that they actually outclass many contemporary designs.
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TerryO
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