I talked to my record shop buddy today while I was in Datona and turns out he Worked for ADS back in the 80's. SO i had him bring up the 1230's on the computer and he looked at them and then proceeded to tell me he worked on the line building them and went into great detail on how they were made. The Cab's were made by a subcontractor and when they got the cabs in they had to work on sealing the cabs and they put a bit of time making sure the cabs were sealed. we then went over how it would be good to add some bracing inside the upper and lower parts of the chambers, reconfirm the seals through each cab and for the chamber divider inside also. he went on to say there was one guy at the end of the line who tested each and every speaker and if they failed they had to go back and work on sealing the cab some more. (they could have used better build quality for the cab by the contractor) he talked about how well made the 1230 cab is But, there is a BUT!!! the BUT is the woofer. we knows the strength and weakness of the woofer and proceeded to use a spare woofer he had laying around (my god its a 30 year old junk pile there) and demonstrated how the rubber surround on the woofer is soo compliant that when you turn up the volume that the cab works so well that it forces the woofer cone to rock and warp and causes to voice coils to move around. he went into what is needed is a thicker by a little bit spider because that's all that is keeping the cone compliant in place. SO every one who has the bigger than book shelf speaker has this known issue but what lines of speakers and how the woofer works in each one is different, you know its happening on sub bass at high volume when the cone starts misbehaving and you can hear it. I do on mine the Spiders get weak over time.
Its very important we work on sealing our ADS cabs!
Sent off a email to RichardSo on this waiting to hear what he has to say, I might try to get my guy here to comment on this also we will see.
over all the ADS speaker is for a time in its production a very well made speaker well thought out and had quality people working at key points in the line who added their own special talents for make the sound just right, example some lady who did it just right on voice coils worked on this coil and made it just right and so on through out assembly. every speaker was tested and only passed when it was just right. the cross overs were well made (my buddy then went off on a tangent on Canton speaker crossovers) apparently they are very well made.
So While I was at Daytona today stopped at the beach for some of this
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Local Club ADS chapter entertainment at the beach