New Polk Owner 1.2 or are they 1.2tl's
embrown057
Posts: 46
I received a set of 1.2s that supposedly has been upgraded to the 1.2TL spec but an unsure as to what exactly was done to complete the upgrade. I know for a fact the tweeters are new but as far as the crossover its a real unknown. I tried to contact the person that did the crossover work through the last owner but to no avail. My question is how difficult is this crossover to remove so I can inspect the work done and check wiring.
Post edited by embrown057 on
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We need some pictures and perhaps serial numbers in order to help you effectively...The Gear... Carver "Statement" Mono-blocks, Mcintosh C2300 Arcam AVR20, Oppo UDP-203 4K Blu-ray player, Sony XBR70x850B 4k, Polk Audio Legend L800 with height modules, L400 Center Channel Polk audio AB800 "in-wall" surrounds. Marantz MM7025 stereo amp. Simaudio Moon 680d DSD
“When once a Republic is corrupted, there is no possibility of remedying any of the growing evils but by removing the corruption and restoring its lost principles; every other correction is either useless or a new evil.”— Thomas Jefferson -
Remove the metal plate on the front, crossovers are attached to it. Do not remove the center bolt.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 -
Great, I'll get one of the crossovers out and take some pictures and serial numbers. Thanks' for the help.
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Serial numbers won't tell you anything...
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I was asked by someone for serial numbers. By the way. I was told you "toolfan66" were the one that upgraded the crossovers.
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The serial numbers would be helpful to id the era in which they were built. Mine are very early SRS 1.2TL's. If his serials come after mine, we know them to be TL's and not 1.2's...
Pics will help the most however.The Gear... Carver "Statement" Mono-blocks, Mcintosh C2300 Arcam AVR20, Oppo UDP-203 4K Blu-ray player, Sony XBR70x850B 4k, Polk Audio Legend L800 with height modules, L400 Center Channel Polk audio AB800 "in-wall" surrounds. Marantz MM7025 stereo amp. Simaudio Moon 680d DSD
“When once a Republic is corrupted, there is no possibility of remedying any of the growing evils but by removing the corruption and restoring its lost principles; every other correction is either useless or a new evil.”— Thomas Jefferson -
Does anyone have the Bill of Materials and/or the official instruction sheet(s) for the Polk-supplied 1.2-to-1.2TL upgrade kit? I haven't seen that paperwork posted in the "sticky" threads.
I'd expect it included eight tweeters, and instructions to reverse the polarity of the tweeter wires. Haven't been through the schematics to see what capacitors, resistors, etc. would have been changed. -
embrown057 wrote: »I was asked by someone for serial numbers. By the way. I was told you "toolfan66" were the one that upgraded the crossovers.
I sent you an email, the more I thought about these crossovers, yes they were mine, but looking back on it these are the ones that Ben upgraded for me when I first got these 1.2'sDoes anyone have the Bill of Materials and/or the official instruction sheet(s) for the Polk-supplied 1.2-to-1.2TL upgrade kit? I haven't seen that paperwork posted in the "sticky" threads.
I'd expect it included eight tweeters, and instructions to reverse the polarity of the tweeter wires. Haven't been through the schematics to see what capacitors, resistors, etc. would have been changed.
If I remember right ( long before we all started changing inductors ) you had to unwind one or two of the inductors to get the same value as the 1.2tl's. But not many of us have our stock inductors anymore. Well the tweakers don't anyway.. -
nooshinjohn wrote: »The serial numbers would be helpful to id the era in which they were built. Mine are very early SRS 1.2TL's. If his serials come after mine, we know them to be TL's and not 1.2's...
Pics will help the most however.
His are 1.2's with crossovers upgraded to TL spec.. -
Did you try the private messages?
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Here are the pictures of the crossover. Are those the original coils? I also see that the sealing was not done very well in the upper right corner. I was not impressed with the bass and that may be one reason why. Will check the other crossover later. That caps are Solen and Sonicap. The resitors are Mills (USA) "love those old black ones" Too bad Vishay closed down the plant in Ill. and moved to Mexico. -
Yep, those are the ones Ben upgraded for me, when I first got into the game of SDA's.
Not impressed with the bass? What are you powering these with? I never had any issue with bass with those crossovers, and I doubt that corner would have a drastic impact with the bass.. -
I would replace the gaskets with armicel..
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I'm using a Parasound 2200 for the bottom and a Marantz PM95 for the top / signals gain is matched < .5db.
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I'm also used to my Snell's XA60's so the Polk's are a real change from them. I have them on grave markers that are spiked into thin carpet in a large room. This may have worked great for the Snell's but may not for the SDA's. In any event they need to stay off the floor as I have a few male Pek's that mark occasionally. I already have major clean-up on these speakers, looks like a cat marked on them at one time and used them for cat-scratch-fever. If I can get them to sound at least as good my Snell's I'll keep them and recover ALL the fabric.
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Proper set up is key. No toe-in, 6 to 8 feet apart, 3 feet from any side wall and 5 to 6 inches off the back wall.I have them on grave markers that are spiked into thin carpet in a large room.
How tall are these grave markers?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 markers made from granite are 4in thick, with the spikes they sit 5in off the floor. Also is this what your using for gasket material?
http://www.insulationfabricators.com/downloads/data-sheets/armacell-armaflex-insulation-tape-data-sheet.pdf -
That's going to put the tweeters way too high.
Anyway, do you have them set up properly as described?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 -
They are 7.5 feet apart, 6 in from wall and plenty of room on the sides. No tow in.. My listening position is 10 feet from the speakers. I tried them at 10 feet apart but imaging was very poor. I moved them in from 10 to 8 and imaging got better but at 7.5 they seem more realistic with the sound coming from more of the center.
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Your set up is pretty good. I'd try them at 6 feet apart for your sitting distance. That said, you should still have plenty of bass as is.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 -
I'll try that later and report back.. Need to replace that seal first on both crossover, home depot I hope has supply of the Armicel tape in stock. Thanks' for your help F1"
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From that description you should check carefully to make sure the polarity of all speaker connections is correct from the amp all the way to the drivers. If wired incorrectly it can kill the bass and the SDA effect will be almost nonexistent.embrown057 wrote: »They are 7.5 feet apart, 6 in from wall and plenty of room on the sides. No tow in.. My listening position is 10 feet from the speakers. I tried them at 10 feet apart but imaging was very poor. I moved them in from 10 to 8 and imaging got better but at 7.5 they seem more realistic with the sound coming from more of the center.- SDA 2BTL · Sonicaps · Mills resistors · RDO-198s · New gaskets · H-nuts · Erse inductors · BH5 · Dynamat
- Crossover upgrades by westmassguy
- Marantz 1504 AVR (front speaker pre-outs to Adcom 555)
- Adcom GFA-555 amp · Upgrades & speaker protection added by OldmanSRS
- Pioneer DV-610AV DVD/CD player
- SDA CRS+ · Hidden away in the closet
- SDA 2BTL · Sonicaps · Mills resistors · RDO-198s · New gaskets · H-nuts · Erse inductors · BH5 · Dynamat
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^Excellent suggestion^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 -
embrown057 wrote: »I'm using a Parasound 2200 for the bottom and a Marantz PM95 for the top / signals gain is matched < .5db.
What are you using as a preamp? Providing you have a speaker configuration menu are they set to large and/or is there a sub assigned for the bass? -
OP,I just read that there's not supposed to be insulation below the lower-most mids. In your last picture, it clearly shows insulation behind, and extending BELOW the x/o's. Could this be the cause of the lack of bass?
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I resealed the crossover on one speaker and moved the poly fill up to the top of the cabinet as suggested by "drumiv and low and behold the mid-range cleared up and the bass is now more defined. I still would like to know if by the picture I posted anyone can tell me if the small inductors are the originals. I also would like to know if there is a "official" white paper from Polk on the 1.2 to 1.2TL upgrade. Has anyone documented the entirety of the upgrade? I got that F1 did not do this crossover upgrade but I have no idea who Ben is or how I can contact him to see if he may remember what he did if anything to the inductors.
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I still would like to know if by the picture I posted anyone can tell me if the small inductors are the originals.
Those are the original inductors.I also would like to know if there is a "official" white paper from Polk on the 1.2 to 1.2TL upgrade.
Never seen one, but I'm sure there was something in the upgrade kit Polk sold.I got that F1 did not do this crossover upgrade but I have no idea who Ben is or how I can contact him to see if he may remember what he did if anything to the inductors.
Definitely not my work, I never use Solen. You will not be able to contact Ben, he passed away.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 -
I'm not fond of Solen either, the sound is edgy/grainy to me. I plan on replacing them later or may just order the boards that VR1 sells and start over. I have never had a love for crossovers, rather stick to what I do the best Vintage receivers and amp's. I do like the clarity MR's but they are a bucket full of cash but then again you get what you pay for in this business. I read some where that some of the inductors need to be unwound a few turns for the "TL" upgrade. I'm surprised that there is not one complete detailed outline with parts and instructions on "Club Polk" for the entire upgrade. It looks like one would have to read through all the upgrade posts and weigh the information as to be valid or not.
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If you get new boards, just get all new inductors as well, they don't cost that much, and they do improve sound quality. Just get the same values DCR.
There are many 1.2tl crossover upgrade threads, just follow those, make sure the wiring is correct, and your good to go..
