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ADS-910's

All that and I was curious about the C2000 mods needed for use with the 1590.
Sure wish i knew, but i dont have enough xover understanding. Based solely on my personal use of Pioneer SF series, pro setups with actives, and the ADS c-2000 i figure the mod MAY be based on resistor changes.
Looking at specsxover specs for the 3 models the c2000 was built for:
L1230 550, 4000hz
L1530 450, 4000hz
L2030 450, 4000hz

Positions A B and C on the c2000.
Curious, that xover of the 1230 and 1530 are the same, yet there are separate settings on the c2000.

The 1590, with xover of 350,5000 ...Not sure what resistance would be altered, but judging from some of the adjustable Bryston actives i see, resistance is at least part of the factors. However, the c2000 does something with bass control as well, all of it is 12db. As ALL of these ADS mentioned do NOT use an active for the mid/tweeter section, its interesting what purpose the c2000 serves here.
What Does work, are pro audio amps with built in xover for the woofers, and direct input to the mid/tweet section. However, there is something the c2000 does that this setup does not (besides bass expansion)
It does however work well, and provides me with my favorite aspects of biamp systems.
1. i can use tubes on the upper end.
2. i have direct volume control over the woofers, without effecting the rest of the system.
 
Something like this would be a viable alternative, though accepts 18g max. Mine were different as can be seen, and 16gauge. I've seen some also similar to the orig, but wouldn't use something that failed to begin with. Not a huge fan of form over function. These would fit the bill, and lots of contact surface. May find the part number, and see associated results based on that search, to find ones with pigtails installed already. With options being many, the idea itself is simple, and above all, reliable. I am not affiliated with OR, simply illustrating similar hardware used to repair speaker of topic, the 910. If you think yours work well it you fiddle with the wire, or they cut out if you TOUCH the wire, then do yourself this justice, and the 910 a solid, and apply this mod.

https://www.parts-express.com/molex-6-pin-connector-kit-0093-2-sets--092-560
 
Did find the original ones again, though others will also work. Prob can use any style plug that is avail, though the ones in my pic do use more common "universal" spade, which may make ease of future repair more simple, (easy to find) however many...many years it will take any of these style plugs or others like them to fail. Or,
Suppose 18 gauge would be sufficient, but measuring the stock and matching it likely ideal. Found the bare plugs without pigtails to 5.00 a pair. 10.00 to do both speakers seems to me to be ...reasonable YES? Making dang sire it's wired correctly ensures we don't put low freq. On a tweet or visa versa. I stared at it for some time.. then when powered up kept tone control and volume down and came up super slow. Reverse engineer I can do, but got a bit confused at first. I can draw something up and simplify the wire orientation for anyone wanting to do the mod. If for ANY reason it seems like a bad idea; I would sure like to hear about it either publicly or privately. Just want what's best for ADS.
 
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There are some factory notes on the C2000/L1590 application mods, didn't seem very complicated. Maybe you were thinking of some other performance mods for the C2000 that Soundmotor has mentioned, but for reference here's the official mod:

Remove C38 and C39 (size about 6/16 x 7/16 x 2/16 inch, color reddish brown, marked .1k 50/100). The cross over selector is set to prog. and the crossover program switches in the back are set so each switch (the little circular hole in each switch) is at the bottom position.

Might be able to do that w/o any more than cutting one leg of each of the two caps, unless they're tight to the board at which case you'd have to desolder (I'd do that anyway). Not difficult either way.

Maybe I missed it, but have you thought about sending one of your treated domes to Richard to A/B against an NOS part? I bet he still has the gear needed to do that scientifically.

John

ADS 1590/2 Rosewood for 2 Channel.
I do still have the C-2000 xover which isn't ideal for the 1590, could be used. I've heard of the mod that can be done, but know of no one capable. Richard So is a no-go. So I've biamped my ADS (and Klipsch Lascala) through an alternative method.
Well, I guess in time, my hair grew back...
 
There are some factory notes on the C2000/L1590 application mods, didn't seem very complicated. Maybe you were thinking of some other performance mods for the C2000 that Soundmotor has mentioned, but for reference here's the official mod:

Remove C38 and C39 (size about 6/16 x 7/16 x 2/16 inch, color reddish brown, marked .1k 50/100). The cross over selector is set to prog. and the crossover program switches in the back are set so each switch (the little circular hole in each switch) is at the bottom position.

Might be able to do that w/o any more than cutting one leg of each of the two caps, unless they're tight to the board at which case you'd have to desolder (I'd do that anyway). Not difficult either way.

Maybe I missed it, but have you thought about sending one of your treated domes to Richard to A/B against an NOS part? I bet he still has the gear needed to do that scientifically.

John
That right John, thank you so much. I thought I had seen that factory bullet at some point, but couldn't quite recall. Couldn't find it a while back either when I looked. Much appreciated indeed.
Richard just did the mid/tweet set for my 1590, and diddnt dawn on me to have him do the testing for the mids. Who better to jave do it? Great call thank you.
 
Did find the original ones again, though others will also work. Prob can use any style plug that is avail, though the ones in my pic do use more common "universal" spade, which may make ease of future repair more simple, (easy to find) however many...many years it will take any of these style plugs or others like them to fail. Or,
Suppose 18 gauge would be sufficient, but measuring the stock and matching it likely ideal. Found the bare plugs without pigtails to 5.00 a pair. 10.00 to do both speakers seems to me to be ...reasonable YES? Making dang sire it's wired correctly ensures we don't put low freq. On a tweet or visa versa. I stared at it for some time.. then when powered up kept tone control and volume down and came up super slow. Reverse engineer I can do, but got a bit confused at first. I can draw something up and simplify the wire orientation for anyone wanting to do the mod. If for ANY reason it seems like a bad idea; I would sure like to hear about it either publicly or privately. Just want what's best for ADS.
Can you post a link for the ones you used and found again please?
 
There are some factory notes on the C2000/L1590 application mods, didn't seem very complicated. Maybe you were thinking of some other performance mods for the C2000 that Soundmotor has mentioned, but for reference here's the official mod:

Remove C38 and C39 (size about 6/16 x 7/16 x 2/16 inch, color reddish brown, marked .1k 50/100). The cross over selector is set to prog. and the crossover program switches in the back are set so each switch (the little circular hole in each switch) is at the bottom position.

Might be able to do that w/o any more than cutting one leg of each of the two caps, unless they're tight to the board at which case you'd have to desolder (I'd do that anyway). Not difficult either way.

Maybe I missed it, but have you thought about sending one of your treated domes to Richard to A/B against an NOS part? I bet he still has the gear needed to do that scientifically.

John
C 38 and 39 removed, and double secured inside the unit. Notation made of 1590 mod , location and orientation of caps inside as well.
Thinking more on the dome testing, perhaps i shall acquire a NOS, and have Chapman Audio Systems test the new against the rc-coated dome. He matches his own drivers, perhaps his determination will be widely enough accepted. Until now, (at least to my knowledge) i see no post on folks cleaning these domes. ADS having (having HAD) a "proprietary" claim on the dome dope, i dont know how widely accepted the info will be. Stuart is a speaker builder, i am (was) a NACE certified coating inspector, so it should be...in the ballpark. Time will tell, and i am veeeeery patient. Thank you for the assistance John.
 
PS.
Over the years, i have looked online occasionally for dome cleaning tips, and the correct product used on these. I have yet to see any detailed info helping clean these up while maintaining correct sound (HEAVILY dust covered ones are not correct anyway). If i am in error, and someone has, or knows of, the fix, feel free to chime in so i can lay off. Ive been working... waiting, to find the right product many years, and am ok to concede to someone who has the cure. PM or public opinion and criticism welcome.
 
Ok, link to wire used to repair umbilical has been deleted. I've learned "no links to ebay outside dollars and cents "
So I'm clear, links to say... Sager is ok, but ebay not is that right? Just want to be clear.
While I am being clear, dome repair is not a service that I offer. The dome pictured is on topic of a driver pulled from ADS 910 speaker. I don't offer this sercive, nor does anyine else to my knowledge. IF
someone offers dome cleaning, let me know and I will shut up. While some folks may offer dome replacement, no one offers dome cleaning do they? Namely, the coating on such domes.
SHOW OF HANDS:
How many have had new coils and domes because they were dusty? How many have dusty domes mids or tweeters and it drives them nutz? (More nutz) How many have wondered "why the heck would anyone make a sticky dome anyway?"
Well, this is a Coating, and i have been in the COATING industry for 25 years. I do not repair or replace coils, or cones, or work on xovers, I do coatings . Many may also do coatings. It's ok for more than one person to do coatings yes?
Let's ALL do coatings then.
 
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That's the one . Fits tight, makes great surface contact, and them connections are known as "standard" and will always be avail should any one in particular need replaced.
Though was just informed my last link to this exact part was deleted due to the fact that it linked to fleapay.
So, save this to your account, and share privately at will. We can also obtain wire same color as srock wire, and keep it uniform all the way to the xover
 
Richard is applying the coating after assembly don't you think? The domes may be NOS but the coating isn't (otherwise they'd be covered in dust by now).

Obviously Richard does a lot more in the restoration process and sending drivers to him is the way to go for preservation - he's the gold standard and his name attached to an ADS speaker now increases the value considerably. If a person just wanted to clean up their domes (especially on lesser ADS models that don't warrant the cost of full restoration) it'd be nice to have an option.
 
That's the one . Fits tight, makes great surface contact, and them connections are known as "standard" and will always be avail should any one in particular need replaced.
Though was just informed my last link to this exact part was deleted due to the fact that it linked to fleapay.
So, save this to your account, and share privately at will. We can also obtain wire same color as srock wire, and keep it uniform all the way to the xover
Great. I've got it in my watch list on fleabay. I may grab them just as backups. I fixed my originals, first with a Deoxit bath, then tightening all the contacts in the plugs and have had no issues in the last year and a half.
Cheers Glenn
 
Richard is applying the coating after assembly don't you think? The domes may be NOS but the coating isn't (otherwise they'd be covered in dust by now).

Obviously Richard does a lot more in the restoration process and sending drivers to him is the way to go for preservation - he's the gold standard and his name attached to an ADS speaker now increases the value considerably. If a person just wanted to clean up their domes (especially on lesser ADS models that don't warrant the cost of full restoration) it'd be nice to have an option.
I send mine without reservation. Cones, crossovers, domes done it all. The dried ferrofluid chief among them even when domes are clean. While this is readily avail, pretty sure the plates need aligned lightly. To use a time genorator and align for maximum spl would likely be to crude a method. The thickness of this coating is a crutial component to the dome mid ADS signature sound. What I've proposed in cleaning is rudimentary and in no way a substitute for reconstruction by Richard due to the fluid, or other age related damage. Such as coil overheating due to dry or parrially dry fluid.That said, this is why I will measure spl of a stock driver, and reconditioned driver.
If it's different, I will hear it. Not matter what a computer monitor says . I've put my ear up against a scope on many occasions. Scope don't always win. But mostly does.
 
Great. I've got it in my watch list on fleabay. I may grab them just as backups. I fixed my originals, first with a Deoxit bath, then tightening all the contacts in the plugs and have had no issues in the last year and a half.
Cheers Glenn
Me as well. The ones I tightened up 10 years ago took quite a while to show signs. If i left them alone! I'm always messing with them though. If the wire it touched slightly, and anything flakes, then I redo. Even though the driver functions, in not sure just how well the origional stretched contacts actually grab. Don't think they are actually considered a mechanical contact. Chapman solders all of his, as well as other manufactures. Stiff firm full surface plugs seem better (but maybe arent) than a plug that makes a small portion of contact, and doing so weakly. I might be wrong however. Swore I heard a marked improvement, likely placebo. Sure did remove any and all questions though
 
Yeah, I hear ya. When I worked on the plugs, I actually bent the female contacts so the fit was very tight. So, maybe I'm good for 10 years!
 
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