I picked up a really nice pair of 1C Studio's from an original owner complete with the factory box's back in January so now I think it's time to go through them. So I'm going to lay out my upgrade plan for some feedback.
1. All drivers and PR's will be "Mortited". Drivers will be J-B Welded. As far as Dynimating the drivers & PR's i wonder if it's really worth it, it sounds like a good idea but it got me thinking if the basket rings like a bell unmounted does it still ring once it's securely mounted ? Has anybody checked this out ?
Also I might have a problem with one MW-6511 (the dreaded shipping problem) it wasn't frozen but the magnet and backing plate had come completely out of the basket and was stuck off center to the base plate, I couldn't get a replacement from Polk at the time because of the bad weather they were having. now I did check the voice coil and it seamed to be ok so I manage to get it re-centered and checked for a short and sure enough there was a short so I broke out a magnifying glass and spotted a single copper wire touching the plug, I used some ceramic glue to get laid back down and it seams to be working just fine, but I'm a little leery about it and thinking of replacing it. So my question is should I replace it with an original (if I can find one) or replace all 4 6511s with new ones from Polk CS to keep everything in balance ? That is unless one of you guys have an original MW-6511 for a 1C that you would be willing to sell I would really like to keep things original as far as the drivers go
2. The Tweeter's will be replaced with the RDO's, The SL2000's sound fine to me until you crank it then they become overpowering and a bit harsh. (Just my opinion)
3. The Cabinets - 70 % poly-fill, ALL new binding posts including one for the IC cable. A Question on the poly-fill, I take it the poly-fill go's from the top of the PR to the top of the cabinet.
I would like to use T-Nut's to mount everything with but I know there not what you would call MDF friendly, So I was thinking of using a small block of poplar or pine for the T-Nut's and gluing the blocks to the inside of the cabinets. Good or bad idea ? Would the blocks affect the resonance of the cabinets ?
4. Crossovers - I will be doing these myself. I'm going with the Mills 12w resistors & Sonicap's. Now considering how much bigger physically the new caps are vers the old one's I was thinking of making new bigger PCB's so that the components could be mounted properly.
So there it is guys, Poke holes in it, Tell me I'm wrong, but I REALLY want your opinions good or bad.
BTW: I absolutely love the sound of SDA's ever since I got my first pair of 2's in the early 80's. Why on earth I decided to sell them along with my S.A.E rack gear I don't know, must have been on drugs.