ADS L630 Questions

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littlefigaro

New Member
So I am fairly new to Vintage speakers. I just picked up a mint pair of ADS L630’s. I also have a pair of NLA’S that I recapped. The L630’s sound amazing. However the advents have a sharper, crisper tweeter. Is this normal? Also, the crossover has several yellow block looking capacitors as well as one normal looking looking capacitor. I can’t seem to find these block shaped capacitors online. (See Pic) Not sure if I should recap these or not?IMG_2286.jpegIMG_2280.jpeg
 
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Yellow caps are film types, they generally don't go bad or change value.

It looks to me like it has a non-factory modification with the resistor hanging in mid air? Do they both have that?

That extra resistor may be in the tweeter circuit? Does the yellow wire go to the tweeter?

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littlefigaro said:
So I am fairly new to Vintage speakers. I just picked up a mint pair of ADS L630’s. I also have a pair of NLA’S that I recapped. The L630’s sound amazing. However the advents have a sharper, crisper tweeter. Is this normal? Also, the crossover has several yellow block looking capacitors as well as one normal looking looking capacitor. I can’t seem to find these block shaped capacitors online. (See Pic) Not sure if I should recap these or not?View attachment 3605212View attachment 3605213
Click to expand...


Hi: I basically asked almost this exact same question recently here on AK about my ADS L 810 speakers. Same basic design methinks except there are 2 woofers instead of one. You need to see some other AK posts about ADS speakers. Opinions vary but at least the black electrolytic cap should probably be replaced. But it should be a non polarized electrolytic of the same value. ( N.P. ) or a film cap which get costly. I will edit or make another post here shortly with posts to these other threads. The other thing that should help according to these other threads is to reposition the choke coils in your crossover so that their magnetic fields do not cross talk to each other. Be sure to read the listening impressions the modified XO's seemed to make to the people that didn't the mods. There are purists out there that say leave well enough alone and I am torn as to whether I should replace the rectangular films on mine or go with higher end caps like Daytons , Solens or other even pricier brands...however we are almost all on limited budgets for our aural hobby... so I may go for a combination of Daytons and Solens have not decided yet. What do you think of your speakers imaging / sound stage ? The ADS speakers all seem to be able to be improved in this aspect as well as a bass hump in some models such as my L-810's.Some feel replacing the power resistors with non inductive types is also very helpful. Do your homework before proceeding that is my advice at this point with my similar project.
Still Mr. Bill

Recap of ADS model 1 L-810 speakers

Hello All of you ADS experts: I have obtained a few months back a set of ADS L-810 speakers that needed some cabinet work. Drivers are fine. I have the re-veneer project almost completed. These are the square corner cabs with black cloth grills. Since they are reasonably awkward and heavy to...
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see my post #35 in this thread BELOW for threads describing repositioning the coils and other mods other folks have done on ADS speakers. They may not be same models as yours but answer your questions to some degrees. Still Mr. Bill

ADS L-810 crossover / tweeter differences? Tweeters not working - clean your fuse connections.

HECK YES! So I checked fuses when I picked them up - both good and both toned out on my ohm meter. Took another look at the fuses, sockets and holders just now. Pulled it all apart, applied some concentrated Deoxit to the conducting surfaces, reassembled and it's alive! Great outcome. And oh...
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I got out my web surfboard and found another picture of an L630 and it has that mid air resistor in it as well. Perhaps it really belongs there, in my experience it is certainly not typical of ADS to do that.
 
Mr Bill said:
Hi: I basically asked almost this exact same question recently here on AK about my ADS L 810 speakers. Same basic design methinks except there are 2 woofers instead of one. You need to see some other AK posts about ADS speakers. Opinions vary but at least the black electrolytic cap should probably be replaced. Not it should be a non polarized electrolytic of the same value. ( N.P. ) or a film cap which get costly. I will edit or make another post here shortly with posts to these other threads. The other thing that should help according to these other threads is to reposition the choke coils in your crossover so that their magnetic fields do not cross talk to each other.
Still Mr. Bill
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That E-cap is only 33uf, so a Dayton film is not crazy expensive, about $10 bucks
 

Recap of ADS model 1 L-810 speakers

Hello All of you ADS experts: I have obtained a few months back a set of ADS L-810 speakers that needed some cabinet work. Drivers are fine. I have the re-veneer project almost completed. These are the square corner cabs with black cloth grills. Since they are reasonably awkward and heavy to...
audiokarma.org

This may answer a few of your questions and I agree with the
mrk229 said:
I got out my web surfboard and found another picture of an L630 and it has that mid air resistor in it as well. Perhaps it really belongs there, in my experience it is certainly not typical of ADS to do that.
Click to expand...

Maybe someone thought the mid or tweet were a bit over the top and quieted either one down. Question is where does the yellow wire go ? I agree about not typical aDs but who knows ?
Mr. Bill
 
Mr Bill said:

Recap of ADS model 1 L-810 speakers

Hello All of you ADS experts: I have obtained a few months back a set of ADS L-810 speakers that needed some cabinet work. Drivers are fine. I have the re-veneer project almost completed. These are the square corner cabs with black cloth grills. Since they are reasonably awkward and heavy to...
audiokarma.org

This may answer a few of your questions and I agree with the

Maybe someone thought the mid or tweet were a bit over the top and quieted either one down. Question is where does the yellow wire go ? I agree about not typical aDs but who knows ?
Mr. Bill
Click to expand...
 
They are a little on the dull side, not terrible. I like the brighter crisper sound I get from the fried egg tweeter on the advents. I tend to turn the treble all the way up to get the L630’s close to my liking.
 
or put an external variable pot on the back and tweak to liking. I hate them inside cabs because they are hard to clean when they oxidize. And the solvents are not good for the drivers either.
Still Mr. Bill but soon may be 6 EYES
 
littlefigaro said:
They are a little on the dull side, not terrible. I like the brighter crisper sound I get from the fried egg tweeter on the advents. I tend to turn the treble all the way up to get the L630’s close to my liking.
Click to expand...

Then you may have found your NIRVANA in these speakers with lower resistance there. BUT also note that if these were put there by aDs that may have been done to protect the tweets from getting fried. So it could be a gamble that way. You need to learn more first. One thing I have found out from a life full of tragedies is that they can be somewhat avoided by "DOING YOUR HOMEWORK " First. You are asking the right questions in the right places but I doubt that you have had the time yet to read all the info I have shared with you. If you do that first you will have a better sense of what is right to do for you. Still Mr. Bill but may soon be 6 EYES
 
Mr Bill said:
or put an external variable pot on the back and tweak to liking. I hate them inside cabs because they are hard to clean when they oxidize. And the solvents are not good for the drivers either.
Still Mr. Bill but soon may be 6 EYES
Click to expand...
I don't think you will find a pot that will operate well at the low resistances being used and the power level required. The circuit may support an "L" pad but you would need the schematic to have a look.
 
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Thanks for all the great info guys I’ll read through everything and give these beauties some more ear time before I think about making any tweaks.
 
mrk229 said:
I don't think you will find a pot that will operate well at they low resistances being used and the power level required. The circuit may support an "L" pad but you would need the schematic to have a look.
Click to expand...

Sorry my bad meant an L pad not a pot.
Still Mr. Bill but may soon be 6 EYES
 
littlefigaro said:
They are a little on the dull side, not terrible. I like the brighter crisper sound I get from the fried egg tweeter on the advents. I tend to turn the treble all the way up to get the L630’s close to my liking.
Click to expand...
Most of my ADS speakers seem to be a touch polite up top, but I don't think having to turn the treble up that far is normal.

Do you bump the treble up any on the Advents? Do have the tweeter set in extended.

I do not know if the 630 tweeters used ferrofluid or not. If they do it may be that it needs changed.
 
Mr Bill said:
You should try to find the schematic for your crossover before modifying it.
Click to expand...
It has been posted.

ADS L710 problem - help!

Hello all, having problems with one of my L710's. Sound is barely audible & scratchy - so I took it apart & got the crossover on the bench... All drivers are OK Hooked up a signal generator & Oscope & a spare 8 ohm woofer, all seemed to be OK - rotated leads to speaker from one output to another...
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I have tried the advent in extended. In that position I like the treble down a couple notches. In the normal position I like it turned all the way up. The ADS speakers are only my 4th pair of vintage. I have some EPI m105’s and also a pair of EPI 180’s that seem to have a bit brighter treble as well. I’m going to give the ADS some more time. They do seem to do a little better on the voices. First pair I have had with a midrange.
 
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