Polk Monitor 10a tweeter Identification?
mikeq00
Posts: 8
I've got a set of 10a now... Tweeters don't perform well.
Took one out... No real I'm ID to tell me which tweeters they are...
One. MADE IN USA sticker, and a screened on number 51x4582. Can't read that x number...
The domes have a small hole in the center, and there are NO Polk Audio stamps on the bracket.
Help?
I took some pics but this is my first post, not sure on the pics posting bit.
Took one out... No real I'm ID to tell me which tweeters they are...
One. MADE IN USA sticker, and a screened on number 51x4582. Can't read that x number...
The domes have a small hole in the center, and there are NO Polk Audio stamps on the bracket.
Help?
I took some pics but this is my first post, not sure on the pics posting bit.
Best Answer
Answers
-
Try the pics again...
-
-
Looks more like that number is 5144582
-
55144582. The last 4 digits are the date code: 45th week of 1982.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 -
... or the 44th week of the year 582.
AD or BC, though, is harder to say.
-
Funny OP never asked for a date.
That is a Peerless tweeter. The hole was something Polk burned into the dome with a soldering iron way back in the day. Many other speaker manufactures used that exact tweeter so you will see some with and without the hole in the dome. In the beginning Polk's never had the hole either.
They are getting harder and harder to find. -
Ivan you are so correct. My phone rang and it was a long conversation so I just hit send. My bad. Yes yes it is indeed a Peerless tweeter KO10DT just to confirm that for you OP.
I hope that brown blob isn't a drop of glue that got dropped onto the surround because that might be hard to remove and will mess up the sound for sure. Maybe that is the problem? Just guessing.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 -
Looks like a larvae pod. Identify that ...nice mod too.Don't take experimental gene therapies from known eugenicists.
-
I was thinking Resorcinol Glue or it could be a piece of Soylent Brown that fell from the ISS.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 -
Yup. Larvae pod.
I just acquired these speakers, and had not done much w them until today. They sounded like crap, but I've heard that with a little love they will respond in kind. I didn't notice that brown blob on the tweeter. I guess the earlier owner want much into taking good care of their gear.
Today, I ordered an sl2000 drop in replacement tweeter. There weren't any of the suggested KO10DT to be found.
I got just the one, and if that brings the sound to life, easy enough to get another for side 2.
I want this set to be part of a 2nd stack for my backup open reel Pioneer 701.
The primary setup is just too much for everyday (especially night...) listening.
I've got the Carver m-500t MKII (Nelion build) with the Carver C1 ("BillD") and my Polk RTi 150s with the big Teac 10.5" deck over there... It's
just my opinion of course, but I think
The Royal Scam is some of the best music playable on vintage gear.
Here's hoping I can resurrect these Monitor 10a units to play well with others.
Cheers, and thanks all for the help!
==Q== -
I just happened to see this as you posted. I hate to be the bearer of bad tidings but you need to cancel that order for the SL2000. It isn't compatible in the 10a crossover and isn't a replacement for the Peerless. I see them come up pretty often. Surprised there aren't any at the moment.
The SL2000 is considered to be the poorest sounding of the vintage Polk tweeters as well.
See "A tale of 5 Tweeters" on this forum.
I wouldn't touch this one because of the wrinkled dome but here's one:
https://www.ebay.com/itm/296615929773
This one from same seller only has slight wrinkle:
https://www.ebay.com/itm/296613124654George / 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 -
Wuhan specials...Don't take experimental gene therapies from known eugenicists.
-
Thanks for the heads up!
I read that Polk had gone up the sl stack, through 1000 to the sl2000 so I made a bad assumption.
I definitely don't want to get into crossover remediation!
Those tweets you shared didn't pop for my eBay search... I guess it pays to know what the hell you are doing.
Ugh
Thank you. -
So to be clear the tweeters don't perform well or the speakers don't perform well? Just curious if the tweeters are actually working? I've had both 7's and 10's with "dead" tweeters that ended up just being a blown fuse.
-
At this point in their life the crossovers NEED to be upgraded. Electrolytic caps have a finite lifespan and yours are way past it.I definitely don't want to get into crossover remediation!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 make dinner noise, but it's flat and subdued. Speakers really don't sound good, all muddy and low end.
I heard a lot about the tweeters going back in these models, so I thought to start there.
If I have to refresh the crossover parts (and I've never actually done any...) I think it would be better to stay on standard rather than deviate with different tweet XO requirements and now I'm trying to match them up.
This isn't my forte for sure, but I'm a fan of older gear and is it always seems worth it to resurrect than but new, for me. -
Well you need to determine, to joe's point, if the tweeters are actually working or not. Each of them.
I haven't tried it but I have heard people suggesting playing some music while listening with a paper towel tube between your ear and the tweeter in question. See if they sound similar and if they are producing sound. Some mono music would be best for this if you have some, like old Beetles or the like.
There are other ways but that's a non technical place to start.
Oh and as he said, check the fuses. Not only that they aren't blown, but make sure there isn't a problem with oxidation on the fuseholders. Early ones are brass, later are plated (probably nickel) brass. I use some 1000 grit sandpaper or crocus cloth or 0000 steel wool. You can use a pencil eraser if you don't have those.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 -
They make dinner noise, but it's flat and subdued. Speakers really don't sound good, all muddy and low end.
I heard a lot about the tweeters going back in these models, so I thought to start there.
If I have to refresh the crossover parts (and I've never actually done any...) I think it would be better to stay on standard rather than deviate with different tweet XO requirements and now I'm trying to match them up.
This isn't my forte for sure, but I'm a fan of older gear and is it always seems worth it to resurrect than but new, for me.
You heard wrong, those Peerless tweeters are not prone to failure.
Upgrading the crossovers means replacing the caps and resistors with the same values, just better parts. You're not changing the crossovers to be able to use a different tweeter.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 -
That is what I meant by resurrect.
If I had installed that errant purchase sl2000, then more strenuous effort would have to be taken.
I'm sticking with the stock pattern, and I'll look into how to refresh the XOs.
I'll just get there is a thread around here on the effort.
You all are right helpful! -
There are tons of crossover upgrade/modification threads in here. Try the search feature. If you have a specific question, just ask.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 have glass fuses on the rear of your cabinets.
Do as Gardenstater suggested above.
Look at them. Pull them out and clean them if the wires inside them look intact.
Show us pics of them if you can.
Congrats on getting a GREAT set of "one of" Polk audio's finest speaker designs.
This exact model was what made me fall in love with Polk audio! I still own a set and play them once in a while just to hear their greatness again. Most people just listen to music and watch movies. I EXPERIENCE them.
