EV SP12C with too-low output and too-high coil DCR...

jon_010101 · 20th June 2009, 09:42 PM

Well, I know it's broken

But what's the likely cause of this? Bad coil winding? I'm seeing about 40-50R on the coil at DC, and measuring about 10dB reduced output. Should I just replace it, or can this be serviced?

Piek · 21st June 2009, 04:39 PM

Did you check the wiring/solder that leads to the cone?

-Micha

jon_010101 · 21st June 2009, 09:31 PM

Up to where they enter the cone, it seems okay. I do think it's possibly a wiring problem on the other side, but I hesitate to cut out the dust cap and whizzer to figure it out (I don't exactly know what I'm doing). The first time I measured, I got 38R, now I get 63R.

20th June 2009, 09:42 PM	#1
jon_010101 diyAudio Member Join Date: Nov 2005	EV SP12C with too-low output and too-high coil DCR... Well, I know it's broken But what's the likely cause of this? Bad coil winding? I'm seeing about 40-50R on the coil at DC, and measuring about 10dB reduced output. Should I just replace it, or can this be serviced?

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21st June 2009, 04:39 PM	#2
Piek diyAudio Member Join Date: Oct 2006	Did you check the wiring/solder that leads to the cone? -Micha

21st June 2009, 09:31 PM	#3
jon_010101 diyAudio Member Join Date: Nov 2005	Up to where they enter the cone, it seems okay. I do think it's possibly a wiring problem on the other side, but I hesitate to cut out the dust cap and whizzer to figure it out (I don't exactly know what I'm doing). The first time I measured, I got 38R, now I get 63R.