Polk 6.5 inch driver ID please -- SR-142-17
Mystery
Posts: 2,546
One of my local buddies had these in some KEF or other (non Polk) speakers that someone replaced the originals with before he got them.
He now has acquired correct woofers so I bought it from him.
Woofer surrounds have engraved Polk audio on them and some numbers.
SR-142-17
It's the same number in both.
There is nothing else in the magnet or anywhere.
It appears that the sticker with model number fell off somewhere.
Any idea?
I'll take few snaps when I get home.
Thanks
He now has acquired correct woofers so I bought it from him.
Woofer surrounds have engraved Polk audio on them and some numbers.
SR-142-17
It's the same number in both.
There is nothing else in the magnet or anywhere.
It appears that the sticker with model number fell off somewhere.
Any idea?
I'll take few snaps when I get home.
Thanks
Klipsch RB81, KG3.5, B&W DM602.5, Polk.
Subwoofers: Klipsch RW10, Triad ProSub Bronze.
Post edited by Mystery on
Comments
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--Gary--
Onkyo Integra M504, Bottlehead Foreplay III, Denon SACD, Thiel CS2.3, NHT VT-2, VT-3 and Evolution T6, Infinity RSIIIa, SDA1C and a few dozen other speakers around the house I change in and out. -
Thanks for the link Gary.
I went through that thread but that doesn't help.
There is nothing written/stamped in the back.
Here are couple of pictures. May be it gives a clue.
The terminals have black and white wires clipped if that's any help.
Klipsch RB81, KG3.5, B&W DM602.5, Polk.
Subwoofers: Klipsch RW10, Triad ProSub Bronze. -
That's one of the MWxxxx drivers. No way to tell which one without the label or having it tested.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's one of the MWxxxx drivers. No way to tell which one without the label or having it tested.
Dang! :sad:
The gasket is cut in an angle on the mounting holes but may be same with all MW drivers.
Is the test something that can be done easily?
Klipsch RB81, KG3.5, B&W DM602.5, Polk.
Subwoofers: Klipsch RW10, Triad ProSub Bronze. -
Sure, with the right equipment.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 -
If you have a very accurate Digital VOM, and measure the coil resistance, might be able to narrow it down.Home Theater/2 Channel:
Front: SDA-2ATL forum.polkaudio.com/discussion/143984/my-2as-finally-finished-almost/p1
Center: Custom Built forum.polkaudio.com/discussion/150760/my-center-channel-project/p1
Surrounds & Rears: Custom Built forum.polkaudio.com/discussion/151647/my-surround-project/p1
Sonicaps, Mills, RDO-194s-198s, Dynamat, Hurricane Nuts, Blackhole5
Pioneer Elite VSX-72TXV, Carver PM-600, SVS PB2-Plus Subwoofer
dhsspeakerservice.com/ -
Hmm...westmassguy wrote: »If you have a very accurate Digital VOM, and measure the coil resistance, might be able to narrow it down.
I have one but not sure how accurate is that.
I'll check them tonight and see.
Klipsch RB81, KG3.5, B&W DM602.5, Polk.
Subwoofers: Klipsch RW10, Triad ProSub Bronze. -
More accurate the better. Not a guarentee by any means, but may be able to narrow down. I have the TS parameters for most of the older Polk MW65XX driversHmm...
I have one but not sure how accurate is that.
I'll check them tonight and see.Home Theater/2 Channel:
Front: SDA-2ATL forum.polkaudio.com/discussion/143984/my-2as-finally-finished-almost/p1
Center: Custom Built forum.polkaudio.com/discussion/150760/my-center-channel-project/p1
Surrounds & Rears: Custom Built forum.polkaudio.com/discussion/151647/my-surround-project/p1
Sonicaps, Mills, RDO-194s-198s, Dynamat, Hurricane Nuts, Blackhole5
Pioneer Elite VSX-72TXV, Carver PM-600, SVS PB2-Plus Subwoofer
dhsspeakerservice.com/ -
Okay, called home and did a tech support walk through to measure them. :rolleyes:
One reads 8.7 ohms and another 8.9 ohms. :idea:
Klipsch RB81, KG3.5, B&W DM602.5, Polk.
Subwoofers: Klipsch RW10, Triad ProSub Bronze. -
That's way too high. Your meter is either not calibrated, or is not accurate enough.Home Theater/2 Channel:
Front: SDA-2ATL forum.polkaudio.com/discussion/143984/my-2as-finally-finished-almost/p1
Center: Custom Built forum.polkaudio.com/discussion/150760/my-center-channel-project/p1
Surrounds & Rears: Custom Built forum.polkaudio.com/discussion/151647/my-surround-project/p1
Sonicaps, Mills, RDO-194s-198s, Dynamat, Hurricane Nuts, Blackhole5
Pioneer Elite VSX-72TXV, Carver PM-600, SVS PB2-Plus Subwoofer
dhsspeakerservice.com/ -
I see.
I'll check again when I go home.
Also will test a resistor from Polk S8 crossover to see if that also gives weird readings.
I have used this meter to read polk monitor speakers and 8 ohm speakers show around 6.8 ohms.
So it's close enough but may not highly accurate.
Klipsch RB81, KG3.5, B&W DM602.5, Polk.
Subwoofers: Klipsch RW10, Triad ProSub Bronze. -
The highest reading I have records for is 7.75 dcr for a 6501, most of the "8" ohm drivers are in the 6.5-6.7 range.I see.
I'll check again when I go home.
Also will test a resistor from Polk S8 crossover to see if that also gives weird readings.
I have used this meter to read polk monitor speakers and 8 ohm speakers show around 6.8 ohms.
So it's close enough but may not highly accurate.Home Theater/2 Channel:
Front: SDA-2ATL forum.polkaudio.com/discussion/143984/my-2as-finally-finished-almost/p1
Center: Custom Built forum.polkaudio.com/discussion/150760/my-center-channel-project/p1
Surrounds & Rears: Custom Built forum.polkaudio.com/discussion/151647/my-surround-project/p1
Sonicaps, Mills, RDO-194s-198s, Dynamat, Hurricane Nuts, Blackhole5
Pioneer Elite VSX-72TXV, Carver PM-600, SVS PB2-Plus Subwoofer
dhsspeakerservice.com/ -
I have used this meter to read polk monitor speakers and 8 ohm speakers show around 6.8 ohms.
You can't measure a speaker's nominal impedance by measuring the resistance at the binding posts.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 -
He's not measuring at the binding posts, he's measuring off the spade lugs on the driver itself.You can't measure a speaker's nominal impedance by measuring the resistance at the binding posts.Home Theater/2 Channel:
Front: SDA-2ATL forum.polkaudio.com/discussion/143984/my-2as-finally-finished-almost/p1
Center: Custom Built forum.polkaudio.com/discussion/150760/my-center-channel-project/p1
Surrounds & Rears: Custom Built forum.polkaudio.com/discussion/151647/my-surround-project/p1
Sonicaps, Mills, RDO-194s-198s, Dynamat, Hurricane Nuts, Blackhole5
Pioneer Elite VSX-72TXV, Carver PM-600, SVS PB2-Plus Subwoofer
dhsspeakerservice.com/ -
You can't measure a speaker's nominal impedance by measuring the resistance at the binding posts.
Ditto, Also remember to subtract the resistance of the test leads from the total resistance measured. Most stated DCR measurements are nominal meaning there can be differences from the stated DCR and the measured DCR. And to make things worse most cheaper DMM's are not very accurate when measuring small amounts of resistance < 10 ohms.
Now there is a way to measure milliohms without breaking the bank on a hi-end DMM by using Ohms law for figuring resistance R = V/I, If you can apply a small constant current of 100ma or 0.100 amps around 5 volts DC to the driver then measure the voltage drop across the driver this will give you all the info needed to calculate the DCR.
An example: Lets say you apply around 5 vdc at 0.100 amps to the driver and you measure a voltage drop of .313 volts using ohms law the resistance or DCR will be 3.13 Ohms. V = 0.313 divided by I = 0.100 amps = 3.13 Ohms.
In the next couple days I'll be posting a how-to on how make an adapter so that your low end DMM can read milliohms with a fair degree of accuracy.“The two most important days in your life are the day you are born and the day you find out why.” ~ Mark Twain -
Okay, looks like the readings were off.
I checked multiple times and one reads consistent at 7.7 ohms and another consistent at 7.6 ohms.
Hopefully, this will narrow it down.
Klipsch RB81, KG3.5, B&W DM602.5, Polk.
Subwoofers: Klipsch RW10, Triad ProSub Bronze. -
That would make it a MW6501. My best guessOkay, looks like the readings were off.
I checked multiple times and one reads consistent at 7.7 ohms and another consistent at 7.6 ohms.
Hopefully, this will narrow it down.Home Theater/2 Channel:
Front: SDA-2ATL forum.polkaudio.com/discussion/143984/my-2as-finally-finished-almost/p1
Center: Custom Built forum.polkaudio.com/discussion/150760/my-center-channel-project/p1
Surrounds & Rears: Custom Built forum.polkaudio.com/discussion/151647/my-surround-project/p1
Sonicaps, Mills, RDO-194s-198s, Dynamat, Hurricane Nuts, Blackhole5
Pioneer Elite VSX-72TXV, Carver PM-600, SVS PB2-Plus Subwoofer
dhsspeakerservice.com/ -
Thanks for info.westmassguy wrote: »That would make it a MW6501. My best guess
BTW, are all MW65xx series have different ohm readings or can there be some with same ohm readings but different model?
Klipsch RB81, KG3.5, B&W DM602.5, Polk.
Subwoofers: Klipsch RW10, Triad ProSub Bronze. -
Some of the Nominal 8 & 4 ohm models have DCRs that are close. The ones you have are the highest DCR I have info on, and it's the MW6501Thanks for info.
BTW, are all MW65xx series have different ohm readings or can there be some with same ohm readings but different model?Home Theater/2 Channel:
Front: SDA-2ATL forum.polkaudio.com/discussion/143984/my-2as-finally-finished-almost/p1
Center: Custom Built forum.polkaudio.com/discussion/150760/my-center-channel-project/p1
Surrounds & Rears: Custom Built forum.polkaudio.com/discussion/151647/my-surround-project/p1
Sonicaps, Mills, RDO-194s-198s, Dynamat, Hurricane Nuts, Blackhole5
Pioneer Elite VSX-72TXV, Carver PM-600, SVS PB2-Plus Subwoofer
dhsspeakerservice.com/ -
Thank you for information.
Is there a list of speakers that use MW6501?
Klipsch RB81, KG3.5, B&W DM602.5, Polk.
Subwoofers: Klipsch RW10, Triad ProSub Bronze. -
These are the parts and driver lists for vintage Polk Monitors and SDAsThank you for information.
Is there a list of speakers that use MW6501?
http://www.polkaudio.com/forums/showthread.php?38755-POLK-AUDIO-Speaker-Wiring-Schematics-amp-More-ALL-MODELS-except-SDA&p=861387&viewfull=1#post861387
http://www.polkaudio.com/forums/showthread.php?55888-POLK-AUDIO-Speaker-Wiring-Schematics-amp-More-Stereo-Dimensional-Array(SDA)&p=916059&viewfull=1#post916059Home Theater/2 Channel:
Front: SDA-2ATL forum.polkaudio.com/discussion/143984/my-2as-finally-finished-almost/p1
Center: Custom Built forum.polkaudio.com/discussion/150760/my-center-channel-project/p1
Surrounds & Rears: Custom Built forum.polkaudio.com/discussion/151647/my-surround-project/p1
Sonicaps, Mills, RDO-194s-198s, Dynamat, Hurricane Nuts, Blackhole5
Pioneer Elite VSX-72TXV, Carver PM-600, SVS PB2-Plus Subwoofer
dhsspeakerservice.com/ -
8 years old thread but still have these.
I looked for these in the basement to see if they work in the SDA1 that I just got.
However, one reads open.
How can it be? They were sitting on a shelf and not even touched all these years.
Klipsch RB81, KG3.5, B&W DM602.5, Polk.
Subwoofers: Klipsch RW10, Triad ProSub Bronze. -
Try using your meter to the wire coming off the spades to the cone on the speaker and see what happens. May be a cold solder joint at the spade. Doubtful but could be.
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Try using your meter to the wire coming off the spades to the cone on the speaker and see what happens. May be a cold solder joint at the spade. Doubtful but could be.
Already did that and still no resistance.
Klipsch RB81, KG3.5, B&W DM602.5, Polk.
Subwoofers: Klipsch RW10, Triad ProSub Bronze.
