Crossover schematics and values
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gjmess
Posts: 15
Is there a place or sticky for crossover schematics and values? Been scouring this forum looking for info on the monitor 11s. I did find info for the RTA 11s...very close.... .5uf and mine has .47uf.
Answers
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The Monitor 11 models can be confusing, can you post a pic of yours?
https://forum.polkaudio.com/discussion/38755/polk-audio-speaker-wiring-schematics-amp-more-all-models-except-sda#latestPolitical 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 -
Sure....they are in pieces so is there something that identifies them....what do you need to see?
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There was an early one with the Peerless tweeter that came out in 1982. At some point in the next year or two, Polk transitioned to the SL1000 tweeter that they made themselves. There may or may not have been minor crossover tweaks at that point. You have the SL1000 tweeters there. I believe that is what Polk sent out as warranty replacements for the Peerless when they were no longer available. It may or may not have left the factory with those.....who knows? It could very well account for the slight variation in your capacitor value from the schematic or they could have made a change during production and we don't have the schematic showing that change. What model of midwooofer do you have? Is it the MW6600?
There was a later resurfacing of these speakers, after a few years gap, in 1986 and they had the SL2000 tweeter. I haven't been able to find that crossover. It wasn't called RTA11 anymore, but it was called Monitor 11. I have a few threads bookmarked because these always intrigued me.
George / NJ
Polk 7B main speakers, std. mods+ (1979, orig owner)
Martin Logan Dynamo sub w/6ft 14awg Power Cord
Crown D150 amp
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 -
Yes...the midwoofers are the MW6600X. I was reading something about the foam around one of the drivers. This foam is just crumbling into dust. Do I need to replace that?
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That is the original Monitor 11 aka the Model 11. It's also mistakenly called the RTA 11, which is an entirely different speaker. I've never seen the Monitor 11 with SL1000 tweeters. Anyway, the schematic for the Monitor 11 is what you want. The difference between your .47 and the .5 is of no concern.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 -
Yes I would. You could listen without and with to do an A/B comparison. It went underneath one of the MW drivers. I believe that it was the inner one. They are mirror imaged pairs. It deliberately didn't have any support apparently so no wonder it crumbled with age.
Another thing I would do if it were me, is to revert to the Peerless tweeters. You may or may not want to revert components to match the schematic exactly. I really don't know if whatever change they made was because of improving the XO for the Peerless/MW6600X combination or if they shipped some of these at some point with the SL1000 and it was a tweak for that. I'd guess the former if I had to guess.
What is the serial #'s, XO dates, driver dates?George / NJ
Polk 7B main speakers, std. mods+ (1979, orig owner)
Martin Logan Dynamo sub w/6ft 14awg Power Cord
Crown D150 amp
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 -
So...where do I find the schematic/values for the monitor 11? Any ideas?
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I believe I put the links to those in this thread, which is one of the ones I bookmarked:
https://forum.polkaudio.com/discussion/195969/monitor-11-needs-help#latestGeorge / NJ
Polk 7B main speakers, std. mods+ (1979, orig owner)
Martin Logan Dynamo sub w/6ft 14awg Power Cord
Crown D150 amp
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 -
S/Ns are 113050, 113043 Dates on the crossovers are 3/15/83 and they dates are the drivers look like 5/27/87...couple are unreadable...faded.
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So...where do I find the schematic/values for the monitor 11? Any ideas?
RTA11 ....or do you really mean Monitor 11? As far as I know we don't have the schematic for the Monitor 11 which is the circa 1986 reincarnation.George / NJ
Polk 7B main speakers, std. mods+ (1979, orig owner)
Martin Logan Dynamo sub w/6ft 14awg Power Cord
Crown D150 amp
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 -
S/Ns are 113050, 113043 Dates on the crossovers are 3/15/83 and they dates are the drivers look like 5/27/87...couple are unreadable...faded.
With a date of 3/15/83, I'd be surprised if your speakers didn't ship with the Peerless but who knows? The Peerless was still being manufactured in 1983.George / NJ
Polk 7B main speakers, std. mods+ (1979, orig owner)
Martin Logan Dynamo sub w/6ft 14awg Power Cord
Crown D150 amp
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 -
https://forum.polkaudio.com/discussion/38755/polk-audio-speaker-wiring-schematics-amp-more-all-models-except-sda#latest
Look for Monitor series
Do yours have a fuse for the tweeter? -
You have the RTA11. That is what Polk called the early one. Then they called it Monitor 11 when it reincarnated with some changes, circa 1986. Curse them for confusing us lol.George / NJ
Polk 7B main speakers, std. mods+ (1979, orig owner)
Martin Logan Dynamo sub w/6ft 14awg Power Cord
Crown D150 amp
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 tweeters looked like the original....gasket super compressed and none of the speakers connectors looked like they had ever been touched. Took a little work to remove them. It's all good. I just wanted these for a winter project. Strip the cabinets, new wood veneer, update here and there. I'll be into them for way too much but whatever.
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yes....one fuse....I assume for the tweeter.
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Yes..tweeter only.
George / NJ
Polk 7B main speakers, std. mods+ (1979, orig owner)
Martin Logan Dynamo sub w/6ft 14awg Power Cord
Crown D150 amp
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 -
Thanks so much for all the help and info. Really appreciate you guys.
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Wondering why mine aren't marked left and right?
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BOGART George !
Stickers may have fallen off. it was a looooong time ago ya know. -
Is that the Dacron replacement?Don't take experimental gene therapies from known eugenicists.
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Is that the Dacron replacement?
It may or may not have been the Limited Edition Grill fabric pattern, allegedly of course.George / NJ
Polk 7B main speakers, std. mods+ (1979, orig owner)
Martin Logan Dynamo sub w/6ft 14awg Power Cord
Crown D150 amp
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 designation number 11 must be an industry standard for throwing anything at it until it starts working....like Windows 11Don't take experimental gene therapies from known eugenicists.
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So...where do I find the schematic/values for the monitor 11? Any ideas?
I already gave you a link to the schematic to the MONITOR 11. Forget the RTA notion, they are the MONITOR 11. My father then I owned a pair, so I should know.
https://forum.polkaudio.com/discussion/182103/polk-monitor-11s-rareYou have the RTA11. That is what Polk called the early one. Then they called it Monitor 11 when it reincarnated with some changes, circa 1986.
False.
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 -
Schematics dated 1982 and noted M11, meaning MONITOR 11.
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 lol anything nutty.
I know right? Such a silly thing to get rude about. No doubt the person who drew the PCB layout schematic thought it should be called M11 and I would tend to agree with him, but the fact is that they ended up calling it RTA 11. I would think that excerpt from the RTA 11 Manual I posted above where they called it RTA 11 should be enough proof. I've got plenty more from magazine advertisements. But why fill his post with unnecessary drama? I've posted all this stuff in the other threads too. OK here goes and I won't hold my breath for an apology 🤣
Stereo Review, Jun 1982
Stereo Review, Aug 1982
Audio, Aug 1982
Audio, Oct. 1982
The component schematic says RTA 11
George / NJ
Polk 7B main speakers, std. mods+ (1979, orig owner)
Martin Logan Dynamo sub w/6ft 14awg Power Cord
Crown D150 amp
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 -
What are we in the 2nd grade? I just showed you the proof. When they brought it out again after a lapse of a few years, with the SL2000 and MW6510's in 1986, that is when they called it the Monitor 11. Just like I said. Spare us the gaslighting please. There is enough of that going around already. Apology accepted 🤣:
Audio Oct. 1986:
George / NJ
Polk 7B main speakers, std. mods+ (1979, orig owner)
Martin Logan Dynamo sub w/6ft 14awg Power Cord
Crown D150 amp
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 -
I've got the original sales receipt from the original Polk dealer dated 1984 that clearly says MONITOR 11. Everyone but you knows they are the MONITOR 11, deal with 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 -
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
