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ADS Driver roll call

While I'm not sure about the woofs the mid was an upgrade. It was heavier with a larger magnet and a better VC if I recall correctly. They are relatively hard to find on eBay but do show up once in a while. I was only able to find one 2 mid for my pair so I really can't say if there was a sonic improvement or not. The general consensus is the 2's were better than the 1's.
 
Well, I've watched two pairs go by on Ebay, one (series 2) in great shape but too much $, and one (series 1) was rough enough I didn't want it badly enough. I love the sound of my L710's, but want a tower. This may turn into a long search.:worried:
 
uplander said:
Well, I've watched two pairs go by on Ebay, one (series 2) in great shape but too much $, and one (series 1) was rough enough I didn't want it badly enough. I love the sound of my L710's, but want a tower. This may turn into a long search.:worried:
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Uplander,
Of the two pairs you saw on ebay, was one pair black and hit hard with the ugly stick and the other pair wood finish and came with two midranges and stands? I saw those two auctions and picked up the wood 1090/2 pair. I paid more than I would have liked, but did it because I was able to pick them up and save on the shipping.

According to the owner's manual, (which came as a 1090 manual with a photocopied supplement for the changes made to the 1090/2), the 1090/2 substituted an 'advanced solid state tweeter protector' in place of the 1.6A fuse and eliminated the 2.5A fuse for the midrange altogether because of 'the new midrange driver's high power handling capacity' which has magnetic fluid cooling.

They have sounded nice until recently. I am getting crackling, static-like distortion and intermittent cutting out of the tweeter. It usually sounds like the distortion and crackling is isolated to the tweeter, but with the tweeter unplugged I think I hear the sounds very faintly from the midrange. I get similar distortoin from another pair of speakers and when an old car stereo speaker is plugged in place of the tweeter. It seemed to improve a bit when I took my Adcom 6 spkr selector switch out of the path.

I'm thinking maybe the crossover or the tweeter protector because of the way it sounds like the tweeter and the substituted speaker break up and cut out. There might be another source in the path for the other distortions which I think I hear faintly in the midrange.

I pulled the crossover out which is a pain to do because they didn't spare the wire lengths when the put these together. Removal of the woofer to access the wires in order to unplug them from the crossover from the inside would likely be impossible without mangling the cabinet because the drivers are adhered to the cabinet with a sticky gasket. So, I pulled the crossover out from the bottom of the cabinet as far as I could and then reached in with long needle nose pliers to unplug the wires. I'm going to make jumpers to extend them all for reassembly. I have no idea where the tweeter protection circuit is hidden so I can try bypassing it.

If anyone has ideas for the distortions and cutting out of the tweeter, I'm all ears. Thanks.

Tom
 
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Tom: Yes, the first ones I passed on were black and received an ugly stick treatment. The ones you bought don't sound like the other pair I was watching. I wish you luck in troubleshooting yours. It sounds like you're on the right track looking at the tweeter protection circuit. Do you have a copy of the crossover schematic?
 
Tom, if you have an ohm meter, measure between tweeter+ and input+ and poke around at the components on the xover, especially the tweeter level adjustment.
 
Up lander I have the diagram but it really won't help you. The ptc or polyswitch is a blue part that looks like a disc capaciter. I had a problem with mine the poly switch was causing low output from one tweeter it had high resistance. I bypassed it and normal output was restored.
 

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adam-ads and mopar3
Thanks for the schematic and the information on the polyswitch. I thought the polyswitch was a capacitor when I saw it on the crossover board, but now that you have helped me identify it as the tweeter protection I can check it or just bypass it and put in a fuse. I'll try your suggestion of checking the tweeter path with a meter. Thanks.

Tom
 
ads mid ranges

Heres two of the dome mids from l1590 series 1 and 2. Part # 206-0213 is from the series 1 and has a huge magnet. Part # 206-0214 is from the series 2 and uses a much smaller magnet. The magnet for the 0214 is the same as the 0215 used in the 1290/2. I had Richard So build a new pair of 206-0214's to complete my 1590/2 from an ebay pair of 206-0215's
 

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I listened closely to the speakers again and the tweeters seem to be fine. I can hear the same distortion from both the left and right speakers at all sound levels and the distortion is exactly the same every time I replay the passage of music. The distortion is in the music (CD burned from an mp3). I have sometimes heard it on factory cds and it is the same in either speaker when I swap left and right inputs. I bought an extra tweeter on ebay. The seller still has a 1590 woofer for sale now. Here is the ebay listing number.

300318965373

Tom
 
I'll pull my L1290 series II drivers tonight unless anyone has some info on them already.

Thanks!

Oh- and if anyone knows the drivers used in the L880 run (was there a series I and II of these?) and any additional info on the L1090 and L1090 II would be greatly appreciated.
 
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All of those driver details are covered in the 1992 ADS Parts Schedule, which is posted to the database...

John
 
thank you- I was looking for it and kept glossing over the file.

Got it now, and got my answers.

Muchas gracias.
 
no ADS history

who has the history of ADS,
there is very little info on the company nor any info on their speakers,

I currently have ADS L10, ADS L780/2 and ADS L810 speakers and some Brauns,

any info is appreciated
 
Dormie said:
who has the history of ADS,
there is very little info on the company nor any info on their speakers,

I currently have ADS L10, ADS L780/2 and ADS L810 speakers and some Brauns,

any info is appreciated
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Look up the ADS pecking order thread for lots of information on ADS history. Member soundmotor used to work there and has posted some great information there. You can also find some information on the ADS Reference website.
 
L980 Series 1 Tweets and Mids

I'm going to part out my L980's that have water damage to the cabinets. The tweets I have are 206-0118 and the mids are 206-0212. Were these used in any other speakers? Are they interchangeable with any other part numbers?

Thanks
 
dbCooper said:
L1590/2

ADS Replacement Part for the tweeter:
206-0118

ADS Replacement Part for the midrange:
206-0214

Don't know if those numbers were the same as the original part numbers. That's just how the parts are stamped.
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I just found this. I thought I read before that the L980 and L1590 used similar mid and tweets. I believe the plates are larger on both and not interchangeable with L1090/1290/880 speakers. Can anyone confirm that?
 
You are correct about the size of the face plates on the 980 and 1590. I searched for a long time to find 1 of those tweeters.
 
MOPAR3 said:
You are correct about the size of the face plates on the 980 and 1590. I searched for a long time to find 1 of those tweeters.
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Thanks. Are both the mids and tweets interchangeable between the 980 and 1590 I or II? Did any other speakers use these same drivers?
 
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