My 2024 Polk SDA 2b Modification Progress Thread (Drop1)
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The original gaskets are better. They are supposed to be ultra thin.Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
The original gaskets are better. They are supposed to be ultra thin.
I know, I know. I ripped the original gaskets out long ago. I'm of two minds but I lean in your direction. The armacell armaflex is seemingly sufficient but it does seem a bit thick. I don't like the idea of overtightening the screws for the sake getting extra compression in the gasket and coupling the woofer to the cabinet. However the cabinets will most certainly be sealed and I don't imagine I'll have any issues with SQ or otherwise.Post edited by drop1 on -
Moretite is the best...Gustard X26 Pro DAC
Belles 21A Pre Upgraded with Mundorf Supremes
B&K M200 Sonata monoblocks refreshed and upgraded
Polk SDA 1C's modded / 1000Va Dreadnaught
Wireworld Silver Eclipse IC's and speaker cables
Harman Kardon T65C w/Grado Gold. (Don't laugh. It sounds great!)
There is about a 5% genetic difference between apes and men …but that difference is the difference between throwing your own poo when you are annoyed …and Einstein, Shakespeare and Miss January. by Dr. Sardonicus -
Shut it!Moretite is the best...The original gaskets are better. They are supposed to be ultra thin.
The armacell armaflex is seemingly sufficient but it does seem a bit thick. I don't like the idea of overtightening the screws for the sake getting extra compression in the gasket and coupling the woofer to the cabinet. However the cabinets will most certainly be sealed.
The Armacell will flatten out easily. Simply once a month turn the screws a little. It will get to be as thin as the original gaskets. It works very good.
You may know this but it is worth mentioning for others. On the woofers and passive, overlap the Armacell then cut on the diagonal so to not have a straight line front to back of the gasket area. This will make sure you do not develop a air leak.
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@pitdogg2 you are absolutely right. I attached the drivers after applying the armaflex and tightened them down. After just a few hours the screws had already backed out just a tad. I removed the drivers after a day and was very surprised to see how much armacel compressed. I no longer see any issue using the armaflex.
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a little progress this weekend.
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Looking nice!
You're reminding me that I've got a set of inductors that have been waiting to be installed in my 2BTL's for... well, let's just say I've had them for a while.
Have fun!Jay
SDA 2BTL * McCormack DNA 0.5 amp * Oppo BDP-93 * Modded Adcom GDA-600 DAC * Rythmik F8 (x2)
Micro Seiki DQ-50 * Mitsubishi LT-30 * Hagerman Cornet 2 Phono
Preamp rotation: Krell KSL (SCompRacer recapped) * Manley Shrimp * PS Audio 5.0 -
^ I hear ya, still haven't installed the resistors & caps in my SDA SRS's.
They've been sitting here looking at me, nagging, for about a year now..... -
That's why I opted to get everything done all at once. It's a lot but I deffintately wouldn't want to be in and out of here at any point once I'm done with this. I begrudgingly finished the inductor mount last night and drilled holes in the cabinets, simply because I already had everything out and ready to get it done.
I just hope my B&K Reference 200.2 can handle the lower impedance with the new inductor. Otherwise I'll have to swap back to the old inductor. -
I've pushed sda with the c coil using a 50 dollar pioneer receiver
Should be good!- Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit. -
ok, good- appreciate the clarification!
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I've decided that it's about time I get to work on this neglected project again. I left off having installed a new walnut veneer. I used a 4x10 sheet of wood backed (3/64") walnut-veneer and installed using DAP Weldwood Contact Cement. I spent last night sanding to 150 grit. I wish a was a bit easier on the sanding (knicked a few corners with a bit too much emphasis). I am spending today finishing with Rubio Monocoat 2c.
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Never use an orbital sander for something like this. Hand sand only in the direction of the grain.Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
You can see some swirls in one of those photos. I think that's mostly dust. After scouring and cleaning with mineral spirits it's all uniform and clean. It was a fairly heavy veneer and manufacturer guidance gave me the OK to use the power sander. I used a hand sander for the edges/corners and edge banding. Hand sanding is the safer route. Using the orbital sander was my choice.
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Well you didn't start off with 60 grit, that's a no-no lol. Looks nice.Don't take experimental gene therapies from known eugenicists.
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Yep, started and ended at 150 grit.
Ultimately wish I would have been more careful with the orbital sander. However I don't need this to be the Mona Lisa. I need the project to be done
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Since I used a thicker veneer, I wasn't able to veneer these trim pieces. I cut some walnut to size as a replacement. It's gonna look awesome guys.
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There Will Be Bl̶o̶o̶d̶ SwirlsPolitical Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
A tip about sanding for the future. Do as little as possible, it's highly overrated/overused. A few quick light passes by hand with the 150 would have done the job.
Good luck with the rest, I hope they turn out well for you.Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk
