Electro-Voice E-V Seven Capacitors

[louye2]

I would like to replace the capacitors on my E-V Seven speakers. They sound pretty good right now, but all the various speaker threads recommend replacing the old capacitors that are likely to be out of spec. The attached picture shows that there are two capacitors on the crossover board -- 4.5 uF and 8 uF. I am planning to order Dayton capacitors from Parts Express, but am not sure which ones to order because there are no exact replacements.

Would the 1% Dayton 4.7 uF (027-230) and 8.2 uF (027-242) be the correct capacitors to order?
Are the 1% capacitors worth the extra cost over the 5% capacitors?

Thank you very much for your advice.

Lou

 

[ra.ra]

Those black/red Callins caps are notorious for being long past their prime, so yes, replacement should be in order. Your selections will work fine, but IMO the extra cost for 1% tolerance is completely unnecessary.

Here's another idea for caps - - very good quality metallized polyester, lower voltage, smaller size, lower cost. You could use a 4.7uF or two 2.2uF's in parallel to replace the original 4.5uF.

Edit: Hey, can you post some more pics of these speakers (front, back, sides, drivers, whatever...)? It seems they might be the exact same size as AR-4x, and I'd like to see more about their build, appearance and components.

https://www.madisoundspeakerstore.com/carli-capacitors/carli-mylar-2.2mfd-150v/
https://www.madisoundspeakerstore.com/carli-capacitors/carli-mylar-4.7-mfd/
https://www.madisoundspeakerstore.com/carli-capacitors/carli-mylar-8-mfd/

 

[louye2]

QUOTE="ra.ra, post: 9712601, member: 117032"]Those black/red Callins caps are notorious for being long past their prime, so yes, replacement should be in order. Your selections will work fine, but IMO the extra cost for 1% tolerance is completely unnecessary.

Here's another idea for caps - - very good quality metallized polyester, lower voltage, smaller size, lower cost. You could use a 4.7uF or two 2.2uF's in parallel to replace the original 4.5uF.

Edit: Hey, can you post some more pics of these speakers (front, back, sides, drivers, whatever...)? It seems they might be the exact same size as AR-4x, and I'd like to see more about their build, appearance and components.

https://www.madisoundspeakerstore.com/carli-capacitors/carli-mylar-2.2mfd-150v/
https://www.madisoundspeakerstore.com/carli-capacitors/carli-mylar-4.7-mfd/
https://www.madisoundspeakerstore.com/carli-capacitors/carli-mylar-8-mfd/[/QUOTE]

 

[drbiggles]

x2 for ra.ra's solution on capacitors. Excellent!

Biggles

 

[ra.ra]

Very interesting, thanks. I'm no expert with these models whatsoever, but it appears that you have the EV Seven-B, which seems to have minor differences from the EV Seven. The drivers in both models look alike, I think, but the Seven had real wood veneer cabinet and a different grille front (see pics). Also, there may have been a small tweak in the crossover design.

Very nice bookshelf speakers. Any further thoughts on cap choices?

 

[drbiggles]

Capacitor suggestions? Hmmm, in my opinion that little tweeter isn't going to make use of the Dayton 1% or 5%. I would stick with what you suggested or Solen or Erse. Simply replacing the capacitor should make a really nice difference. The highs should open up, really spice things up quite a bit. And any issues with the low frequencies sneaking in through the old capacitors and causing harm will be taken care of.

Biggles

 

[bambam428]

I think I went with a 4 and .47 in parallel to get close to 4.5uF, and two 4s in parallel for the 8uF. Dayton 5%. I just scrolled through my pics and unfortunately it looks like I forgot to take an "after" shot. I do recall that mine had been messed with and were wired incorrectly so I had to print the schematic and try to puzzle out how to make what I had match it. Worked out in the end, though. I love those cane grilles.

 

[louye2]

Here are some pictures of the EV 7s. Hope it helps you with your research.

 

[louye2]

I ordered the 5% Dayton caps. Thank you to everyone who responded with their most excellent advice.

Lou

 

[bambam428]

I had to look... Turns out I used 4.3+.22 = ~4.5uF and 2x4 = 8uF. I didn't listen to these for very long before moving something else into the hot seat, but I remember them sounding pretty nice for their size and position in the lineup (very small by EV standards). And you can't beat the looks!
(And as I look at the pics, I notice I didn't solder the leads of the caps together, just twisted... may need to open them again...)