CAPACITOR ORIENTATION FOR CONRAD JOHNSON SPEAKERS

[skaelin]

I am restoring some old Conrad Johnson Synthesis LM20 speakers. I am changing out the 30 year-old electrolytic caps in the crossover but I am confused as to the orientation of the caps (see 1st pic below). Note how the notch in each cap (blue caps) is oriented in the opposite direction. I always thought a notch at one end meant a cap was polar. But here's the problem: the 2nd picture below shows the NP designation on the cap which means Non-Polar. So are the caps polar or not?

If you wish to see a larger photo just click on the picture.

 

[AllenB]

You should replace them with non-polarised caps.

 

[speakerdoctor]

Many non polar lytic caps are made with that notch at one end. What's important is that the marking on the cap says np or NP or Non-polar or bi-polar.

 

[jcx]

its just a crimp to hold the header/seal assy in place

 

[skaelin]

Should I just replace these old electrolytics with some new film caps?

 

[speakerdoctor]

Should I just replace these old electrolytics with some new film caps?

Yes, and somebody already suggest that.
That bundle of caps reminds me of Peter Snell's xo's.

 

[AllenB]

Take note of where they are already paired (such as the electrolytic in parallel with the film). If it were me I'd replace the pair for one if possible, but I don't normally like to pair them like that.