Completed the ugrade of the 2.3s
Comments
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I sharpened-up some Grade 8 hardware-store bolts on a bench grinder after cutting the heads off. Then added T-nuts to the speaker-cabinet bases, locked my "spikes" with jam-nuts, and called it "good-to-go" about ten or fifteen years ago.For spikes - I used 1/4-20 hanger bolts on my 3.1TLs and they work really well. $3 for all 4.
Three "spikes" per cabinet, so six bolts, six T-nuts, six nuts.
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I sharpened-up some Grade 8 hardware-store bolts on a bench grinder after cutting the heads off. Then added T-nuts to the speaker-cabinet bases, locked my "spikes" with jam-nuts, and called it "good-to-go" about ten or fifteen years ago.For spikes - I used 1/4-20 hanger bolts on my 3.1TLs and they work really well. $3 for all 4.
Three "spikes" per cabinet, so six bolts, six T-nuts, six nuts.
I did the same thing for my Martin Logan Dynamo sub, Grade 8 bolts are probably much harder than commercial "audiophile" eye candy spikes and make for more of a point contact. Below the spikes is my seismic mass with 2 minimally inflated 16" bicycle tubes to stop vibration transmission to the floor.George / NJ
Polk 7B main speakers, std. mods+ (1979, orig owner)
Martin Logan Dynamo sub w/6ft 14awg Power Cord
Onkyo A-8017 integrated
Logitech Squeezebox Touch Streamer w/EDO applet
iFi nano iDSD DAC
iPurifier3
iDefender w/ iPower PS
Custom Steve Wilson 1m UPOCC Interconnect
iFi Mercury 0.5m OFHC continuous cast copper USB cable
Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
Custom Vibration Isolation Speaker Stands and Sub Platform -
Nice work! Upgraded my 2.3's about 8 years ago with Sonicaps and RDO-194's, but have just recently been able to upgrade the turntable and enjoy these bad boys again due to CoronaCation. They are just sooo good.
SDA SRS 2.3 -
Sonic Frontiers... Nice stuff!Gustard X26 Pro DAC
Belles 21A Pre modded with Mundorf Supreme caps
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 -
Nice work! Upgraded my 2.3's about 8 years ago with Sonicaps and RDO-194's, but have just recently been able to upgrade the turntable and enjoy these bad boys again due to CoronaCation. They are just sooo good.
What is that on some of the MW driver cones? Is that similar to the piece that Polk puts on some of their passive drivers?
George / NJ
Polk 7B main speakers, std. mods+ (1979, orig owner)
Martin Logan Dynamo sub w/6ft 14awg Power Cord
Onkyo A-8017 integrated
Logitech Squeezebox Touch Streamer w/EDO applet
iFi nano iDSD DAC
iPurifier3
iDefender w/ iPower PS
Custom Steve Wilson 1m UPOCC Interconnect
iFi Mercury 0.5m OFHC continuous cast copper USB cable
Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
Custom Vibration Isolation Speaker Stands and Sub Platform -
As far as I know they were only used on the sda 2.3s. They are known as sub bass drivers. Polk mw6513s. I dont know why they aren't on any of the others such as 1.2 1.2tl 2.3tl 3.1tl just the 2.3s. They have donuts attached to the cone for added weight. I actually havent seen them on any other models of polk
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Huh....interesting! What are the donuts made of? Plastic....foam?George / NJ
Polk 7B main speakers, std. mods+ (1979, orig owner)
Martin Logan Dynamo sub w/6ft 14awg Power Cord
Onkyo A-8017 integrated
Logitech Squeezebox Touch Streamer w/EDO applet
iFi nano iDSD DAC
iPurifier3
iDefender w/ iPower PS
Custom Steve Wilson 1m UPOCC Interconnect
iFi Mercury 0.5m OFHC continuous cast copper USB cable
Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
Custom Vibration Isolation Speaker Stands and Sub Platform -
The donuts were added to the top and bottom stereo drivers to limit their frequency response. It was a method of tuning.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 -
Paper/cardboard. They were only used on the original 2.3's. I haven't heard a set of the TL's (which didn't use them) to compare but my modded 2.3's sounded great but had almost too much bass for me. Probably could have been balanced out with a different amp/pre combo.Gustard X26 Pro DAC
Belles 21A Pre modded with Mundorf Supreme caps
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 -
Paper/cardboard. They were only used on the original 2.3's. I haven't heard a set of the TL's (which didn't use them) to compare but my modded 2.3's sounded great but had almost too much bass for me. Probably could have been balanced out with a different amp/pre combo.
Very true! I sold high end A/V in college when I didn't have a pot to pisS in, and the 2.3's were always a huge seller because of the bass response. When I was in my 30's and could finally buy that exact system I use to demo, I looked for 2.3's for months before finally finding them mint on Craigslist 1,000 miles away... thank goodness for Yellow Freight! Now with modded crossovers and RDO tweeters, these things are ridiculously good IMO.SDA SRS 2.3 -
So the rdo' arrived today. I'm getting ready to install. I cant wait to hear the difference in sound that everyone says. I can now say the upgrade is complete. One question polkies, do these need to burn in?
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Rdo's came in today.. I'm getting ready to install.. can wait to hear them. Now I can say the upgrade is complete. Really excited to hear the difference. One question polkies, is there a burn in period on these?
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Some say there is. I thought they sounded great right out of the box.Gustard X26 Pro DAC
Belles 21A Pre modded with Mundorf Supreme caps
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 -
They do sound great out of the box but they do get better at about 75hrs.
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Sound_Recluse wrote: »Rdo's came in today.. I'm getting ready to install.. can wait to hear them. Now I can say the upgrade is complete. Really excited to hear the difference. One question polkies, is there a burn in period on these?
Those are the wrong ones.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 -
No way
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Nice.. Thanks guys.. and yes they do sound great
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Just kidding 😆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
