Low uhm reading on sub speaker

[12Acres]

My Yorkville Elite subwoofer 600 isn't working, (it was given to me years ago and I never used it). Using a multimeter I got a reading of 4.4 ohms on this 8ohm speaker. My question is "is it repairable or toast?

 

[fpitas]

That might be correct. Impedance is not the same as the DC resistance. 8 ohm drivers often have around 5 ohms of DCR.

 

[voodooless]

That might be correct. Impedance is not the same as the DC resistance. 8 ohm drivers often have around 5 ohms of DCR.

From what I could find the driver could be a RCF L18/851. Rcd is speced at 5.7 Ohm. Best would be to remove the driver and check if it’s indeed this driver. If so, it can probably be repaired if you can find a new assembly for it.

 

[fpitas]

I guess it has no output? Before you scrap that driver, try putting a 1.5V battery to it to see if the cone moves.

 

[12Acres]

From what I could find the driver could be a RCF L18/851. Rcd is speced at 5.7 Ohm. Best would be to remove the driver and check if it’s indeed this driver. If so, it can probably be repaired if you can find a new assembly for it.

Thank you, it is the RCF L18-851. I'm not sure I have the knowhow to remove the driver or how to test it. I'll keep searching before I turn it into a big magnet on my tool box. I appreciate the help.

 

[voodooless]

I'm not sure I have the knowhow to remove the driver or how to test it.

Then repairing the thing will also be an impossible job to do yourself. You may just ask some local job that does reckoning of PA drivers.

 

[fpitas]

Definitely try the battery trick. If you get no action, you know where you stand.

 

[Ron Texas]

Uhm...

 

[12Acres]

I guess it has no output? Before you scrap that driver, try putting a 1.5V battery to it to see if the cone moves.

Thank you, I will try that. I do have a concern about the patch cord. I run it from my amp (speakon-1/4"TRS) to the speakers input with a TRS M. It looks to me like it's possible I have the wrong cord because I wonder why the no. 3 hole has nothing attached at the back? Could it be a wiring issue? Wrong cord?

 

[fpitas]

Thank you, I will try that. I do have a concern about the patch cord. I run it from my amp (speakon-1/4"TRS) to the speakers input with a TRS M. It looks to me like it's possible I have the wrong cord because I wonder why the no. 3 hole has nothing attached at the back? Could it be a wiring issue? Wrong cord?

If the cone moves with the battery, then wiring is probably your issue.

 

[12Acres]

If the cone moves with the battery, then wiring is probably your issue.

This is encouraging, I did the battery test and had cone movement and deep static noise.

 

[fpitas]

This is encouraging, I did the battery test and had cone movement and deep static noise.

Good news. Wiring is relatively cheap and easy to fix.

 

[12Acres]

Good news. Wiring is relatively cheap and easy to fix.

TADA! I fixed the wiring, hooked her up and BOOB! We got some deep low end. Thanks to you all for the help, you saved me $1200 for the Mackie Thump I don't have to buy, yet.