Vintage Monitor and SDA Speaker Deals
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The Stereophile review of the 11t sound quality was not very complimentary. Who knows what they'd be like with a crossover, tweeter, and wiring upgrade. That's a $950 orig. price speaker for $225 though, and allegedly in great condition and wood veneer. I don't know if the wood veneer was an option or not.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 -
Saw these posted today. https://dallas.craigslist.org/dal/ele/d/houston-vintage-polk-audio-srs-31tl/7176709469.htmlPS Audio Stellar Gain Cell DAC/Preamp
Denon DVD 2910
Quad 12L Active Monitors
Marin Logan Dynamo 700W -
Saw these posted today. https://dallas.craigslist.org/dal/ele/d/houston-vintage-polk-audio-srs-31tl/7176709469.html
Hell the crossovers are worth that! Must be a member.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 -
Hell the crossovers are worth that! Must be a member.
That's what I thought too. If I had the extra cash I'd be on the road.PS Audio Stellar Gain Cell DAC/Preamp
Denon DVD 2910
Quad 12L Active Monitors
Marin Logan Dynamo 700W -
https://omaha.craigslist.org/ele/d/council-bluffs-vintage-polk-audio-sda-1/7171149643.html
No Affil. These must be very early SDA-1's, two fuses on rear and special SDA cable with multiple pins. Has the original boxes. Too bad he posted tiny thumbnail photos.
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Peerless tweters too?HT/2Channel: Emotiva MMC-1, Adcom GFA-555II, Polk SDA 3.1's, Teac TN-300 TT, Polk Center and Sub.
Bedroom system: Carver CT-24, Parasound HCA-800II, Monitor 10's
Additional projects: RTA 12c's -
Peerless tweters too?
Wrong SDA1 never came with peerless, they were all SL1000 until the SDA1a and then they used the SL2000 tweeters.
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That is what I thought. Those look like the peerless though in the picture. that is why I asked.HT/2Channel: Emotiva MMC-1, Adcom GFA-555II, Polk SDA 3.1's, Teac TN-300 TT, Polk Center and Sub.
Bedroom system: Carver CT-24, Parasound HCA-800II, Monitor 10's
Additional projects: RTA 12c's -
Yes but different dome material. Same dome as SL2000 -
Not mine, but anybody in Utah might be able to get themselves a nice deal. They won’t last long methinks.
https://classifieds.ksl.com/listing/60936412
Current Collection: Monitor 4a (Peerless), Monitor 5B (Peerless), Modified Monitor 7b (Peerless), RTA15TL (SL3000), SDA CRS+ (194’s), SDA SRS 2.3TL, R100's, R200’s, R300 🤩 -
Something doesn't look right with that tweeter, besides the obvious damage. Probably not the right tweeter and what's up with that piece of sheet metal above it? He says he bought them 10 years ago at Best Buy LOL. Some of the MW drivers don't look right....maybe dust cap separation dunno.
PS: Maybe the tweeter is from an RTA 12C with the tweeter flipped upside down?Post edited by Gardenstater onGeorge / 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 -
Monitor 10 and 10Bs, $100/$200 in south jersey:
https://www.facebook.com/marketplace/item/290018555468437
https://www.facebook.com/marketplace/item/268827254449733
no affiliation -
Those 10B's are interesting but I don't like what I've heard about the imaging issues. I have 2 extra 7B crossovers. I wonder how the 10B's would sound if you disconnected either the inner or outer MW's and used a 7B crossover instead? Would they sound as nice as a 7B only with deeper bass? I realize that you might need to swap out the MW with one that is compatible with the 7B crossover, but I also have some spare MW6500's as well as some USA Peerless tweets.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 -
Gardenstater wrote: »Something doesn't look right with that tweeter, besides the obvious damage. Probably not the right tweeter and what's up with that piece of sheet metal above it? He says he bought them 10 years ago at Best Buy LOL. Some of the MW drivers don't look right....maybe dust cap separation dunno.
PS: Maybe the tweeter is from an RTA 12C with the tweeter flipped upside down?
The tweeter appears to be SL3000 with a pushed in dome. The plate above it is legit. No it's not from RTA 12 anything.
Polk used the same plate other speakers RTA 15 for example. -
I see. Thank you! http://www.hifi-classic.net/review/polk-audio-rta-15tl-87.html
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 -
Gardenstater wrote: »Those 10B's are interesting but I don't like what I've heard about the imaging issues. I have 2 extra 7B crossovers. I wonder how the 10B's would sound if you disconnected either the inner or outer MW's and used a 7B crossover instead? Would they sound as nice as a 7B only with deeper bass? I realize that you might need to swap out the MW with one that is compatible with the 7B crossover, but I also have some spare MW6500's as well as some USA Peerless tweets.
The 10Bs sound fantastic when converted to SDAs using CRS+ crossovers. The lobing issue is gone and soundstage expands.Don't take experimental gene therapies from known eugenicists. -
Gardenstater wrote: »Those 10B's are interesting but I don't like what I've heard about the imaging issues. I have 2 extra 7B crossovers. I wonder how the 10B's would sound if you disconnected either the inner or outer MW's and used a 7B crossover instead? Would they sound as nice as a 7B only with deeper bass? I realize that you might need to swap out the MW with one that is compatible with the 7B crossover, but I also have some spare MW6500's as well as some USA Peerless tweets.
The 10Bs sound fantastic when converted to SDAs using CRS+ crossovers. The lobing issue is gone and soundstage expands.
That sounds like a great idea. Do you know anyone who has CRS+ crossovers for sale, from a parted out one? I'll put in a saved search on eBay but I won't hold my breath.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 -
What ohms are your spare mw6500s?Don't take experimental gene therapies from known eugenicists.
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DC resistance 6.5 Ohms, Nom. impedance 8.0 Ohms
Driver: MW 6500 Driver's model #.
Brand: Polk Driver's brand name.
Fs: 31.0000 Hz (Free air resonance)
Vas: 2.6486 ft^3 (Compliance volume)
Qts: 0.2190 Total Q
Qms: 1.3000 Mechanical Q
Qes: 0.2640 Electrical Q
Sd: 0.0130 M^2 (Piston area)
Xmax: 3.1800 mm (Cone excursion, linear)
Revc: 6.5000 ohms (DC resistance)
Znom: 8.0000 ohms (Nominal impedance)
Pmax: 35.0000 watts maximum rated powerGeorge / 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 -
You have to replace one of the mw6503s with preferably mw6511 for the SDA drivers.Don't take experimental gene therapies from known eugenicists.
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Thanks. Good to know. I guess that complicates things. One thing for sure there is a plentiful supply of unmodded 10's being sold, and one could probably be had on the cheap, for it's box and passive and perhaps one of the MW's could stay. The issue will be finding a CRS+ crossover for sale, or point to point wiring up one myself with high end components. I'd prefer to get a stock crossover to check the feasibility of the whole project before spending the cash for all the upgrade crossover components. It's something to think about as long as it's cheaper than buying a used SDA and for the entertainment value of trying something new. If it turned out to be a great sounding little speaker perhaps someone could make circuit boards for the crossovers to be populated by people's choice of components and it would be cool to be able to take all those unrespected 10's out there to a much higher level.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 -
Let me check my stash. I think I still have an unmodded set.Don't take experimental gene therapies from known eugenicists.
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Seems like PMs aren't working again here. I have an extra set I got from another member last year or so. PM me if you're interested.Don't take experimental gene therapies from known eugenicists.
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Price may be a bit high at $300 but I think these RTA 11 (also referred to as Monitor 11) are pretty rare, and as it has been said here by others, is what the Monitor 10's should've been. No affiliation. Chester Springs PA:
One MW handles 3.5kHz and below and is phase compensated and the other Woofer handles 400Hz and below and is impedance compensated.
https://philadelphia.craigslist.org/ele/d/chester-springs-two-vintage-polk-audio/7169647394.html
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 -
I like my 10's. I bought them new in the 80's. Served me well all through college and now they are a part of my office system. Carver Pre with and Adcom amp. Of course I'm not really sure what people mean when they start throwing terms out. I have always wanted to get in on a Polk get together to see if someone can explain it to me. I'm a first person learner....HT/2Channel: Emotiva MMC-1, Adcom GFA-555II, Polk SDA 3.1's, Teac TN-300 TT, Polk Center and Sub.
Bedroom system: Carver CT-24, Parasound HCA-800II, Monitor 10's
Additional projects: RTA 12c's -
These SOLD in one day! No Affil.
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Gardenstater wrote: »Price may be a bit high at $300 but I think these RTA 11 (also referred to as Monitor 11) are pretty rare, and as it has been said here by others, is what the Monitor 10's should've been. No affiliation. Chester Springs PA:
One MW handles 3.5kHz and below and is phase compensated and the other Woofer handles 400Hz and below and is impedance compensated.
https://philadelphia.craigslist.org/ele/d/chester-springs-two-vintage-polk-audio/7169647394.html
The 11's are rare. Did you buy them? If I find a nice pair local I'm buying.
Post edited by aprazer402 on -
If only it were in my budget and only 1hr, 45m drive. Those are really really nice (except for the tweeter). Original owner too. I'm not even done with the upgrades in my 7B's yet, but if I could do it all over again I would prefer to have these I think. We don't have an actual schematic of this one so I wonder what the MW drivers were in these, and whether it would also be an option to SDA these with a 2B or CRS+ crossover.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 -
Sometimes I answer my own questions. It had 2 MW6510's. So it could be SDA'd without any driver swap outs with a CRS+ Blade-Blade crossover. Same driver compliment. Or swap out one of the MW6510's for a MW6511 (or perhaps MW6502) and use a 2B or CRS+ Pin-Blade Crossover.
https://polksda.com/monitor11.shtml
But of course I'd like to listen a long while first as is.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 -
I would say 11's are very rare. I see all the others fairly often. I'd love to complete my Monitor collection with a set of them. I think I have all the Monitor but them.HT/2Channel: Emotiva MMC-1, Adcom GFA-555II, Polk SDA 3.1's, Teac TN-300 TT, Polk Center and Sub.
Bedroom system: Carver CT-24, Parasound HCA-800II, Monitor 10's
Additional projects: RTA 12c's