SDA SRS cabinets differences
Comments
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I’m not talking about the cabinets just the beautiful solid wood top cap which is a simple square flat piece bolted to the cabinet. I like the look of solid hardwood for that. But I guess it wort out for polk. Mine are perfect after 36 years. If they weren’t I would make replacements. I don’t like the veneer that polk started using there. That’s all. Didnt mean to stirr up all the furniture guys and probably should have been more clear and stayed in my lane. But I did learn a lot about the SRS cabinet evolution and reasons for it. Fun stuff and I’m amazed at the wealth of knowledge and history on this forum. I’m humbled.
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36 ye
36 year old solid caps. Love em. It’’s a shame some have cracked and warped. -
A great example would be focal versus Wilson. One uses mdf (focal) and one uses a phenolic resin based material hard as steel.
They have extremely different sounds, whether or not it is better or worse is hard to say but the cabinet construction definitrly has a determining factor on that difference I am sure.- Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit. -
gregmoyers wrote: »36 ye
36 year old solid caps. Love em. It’’s a shame some have cracked and warped.
Are you sure that's solid wood? That picture was kind of hard to tell- Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit. -
They are blade blade srs I bought new in ‘87. Supposed to be. Look to be. They look nothing like the 2.3’s and 1.2’s I’ve seen.
I’m going to investigate and report back. -
Need a pic of the ends to tell for sure if it's solid or veneer. They look similar to my SDA 1-C's that are veneer
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I’m gonna say first
Looks like veneer!
At least on the ends. -
That is veneer.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 -
BLHa Ha Ha
So……
Not all the sda srs’ were solid.
Wonder when they changed.
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Do you have a pic of the solid ones?
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The Baltimore speaker builders were known to make use of what they had laying around back in the mid 1980s around transition periods between versions and when they figured out improvements were needed. The benefit of being basically hand built.
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Yeah definitely veneer!- Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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Maybe my cabinets are mdf and not “particle board”?
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Na
Looks like pb. -
Definitrly particle board- Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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Yessir. Regardless they look nice. I got an education on antique furniture in the process.
LOL. -
Not all of those pieces of furniture I posted are antique, some are pretty new.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 -
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@gregmoyers
F1nut likes to play with his wood. He is a wood restorer by night. You should see his coffin he sleeps in by day.2-channel: Modwright KWI-200 Integrated, Dynaudio C1-II Signatures
Desktop rig: LSi7, Polk 110sub, Dayens Ampino amp, W4S DAC/pre, Sonos, JRiver
Gear on standby: Melody 101 tube pre, Unison Research Simply Italy Integrated
Gone to new homes: (Matt Polk's)Threshold Stasis SA12e monoblocks, Pass XA30.5 amp, Usher MD2 speakers, Dynaudio C4 platinum speakers, Modwright LS100 (voltz), Simaudio 780D DAC
erat interfectorem cesar et **** dictatorem dicere a -
LMAO🤣🤣🤣
He is a wealth of knowledge tho! -
gregmoyers wrote: »Do you have a pic of the solid ones?
The original end caps of my SDA SRSs are laminated oak boards. I say original because they were replaced with curly maple end caps:
https://forum.polkaudio.com/discussion/131134/curly-maple-end-caps-and-side-strips-for-the-sda-srs
Figure 1. Original oak SDA SRS right side end caps.
Figure 2. Original oak SDA SRS right side end cap edge view.
Figure 3. Original oak SDA SRS right side end cap corner edge view.
Figure 4. Original oak SDA SRS right side end top closeup view.
Figure 5. Original oak SDA SRS right side front edge view.
Figure 6. Original oak SDA SRS right side edge view.
Figure 7. Original oak SDA SRS left side end caps.
Figure 8. Original oak SDA SRS left side bottom cap edge view.
Figure 9. Original oak SDA SRS left side top cap edge view with crack. The crack was caused by the cabinet being 61-7/16", or 1/16th" too short. The side strips were exactly 61-1/2" long. Over time the 1/16th" protrusion of the side strips caused a crack on both sides of the cap.
Figure 10. Original oak SDA SRS left side top cap edge view showing crack on other side. The other three caps were fine. I assumed the cracks in this cap were due to expansion/contraction of the wood. I did not find out the true cause until I replaced the original caps with the new curly maple caps and saw that the top left cap would not sit flush on the cabinet top. I could rock it up and down. I shaved 1/16th inch off each side strip and all was well.
Proud and loyal citizen of the Digital Domain and Solid State Country! -
At some point pre ‘87 I guess they started laminating mdf.
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Love the curly maple. Did you ever do your 1.2’s?
I was thinking gloss black too. They do deserve better than what came on them. -
gregmoyers wrote: »Love the curly maple. Did you ever do your 1.2’s?
Yes. A few months after doing the SRSs.
https://forum.polkaudio.com/discussion/134147/sda-srs-1-2tl-custom-wood-panels
Proud and loyal citizen of the Digital Domain and Solid State Country! -
By what mechanism do lil' grooves break up standing waves? They're not deep enough to have any real effect based on wavelength.The grooves broke up standing waves within the cabinet.
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You might want to rethink that one.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 grooves must be there for something and cabinet tuning makes the most sense. What else could it possibly be for.
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Fine. Give me some input on where I'm wrong.You might want to rethink that one.
I expect the goal was cabinet tuning. Standing waves doesn't make any sense to me.gregmoyers wrote: »The grooves must be there for something and cabinet tuning makes the most sense. What else could it possibly be for.
Inducing deliberate cabinet deflection/resonance is my best guess. Not only is the bassive radiator vibrating to the pressure nodes in the cabinet, the cabinet walls have intentional rigidity-reducing slices carved into it to promote (controlled) panel vibration.
But I wasn't there when the design was being debated. I have no "inside" information.
Which is why I asked to begin with.
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Polk stated they are to break up standing waves. I'll take their word for it.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
