AR4x cap replacement

[Kevin Wheeler]

I have three sets of AR4x and one set of AR4xa speakers Iam in the process of redoing. They need a lot of love. Inside they have some differences,even among sets. What is the best recommendation to replace the caps. I have not opened all of them up. Im on my second set.Some have a plastic rectangle, one has a silver can about the size of a c cell battery rated at 20uf 50 vnp. Send help. SOS.

[DavidR]

Well you need to replace with the same value (i.e. uF, the capacitance; BUT voltage can be higher). I recommend you use Non-polar electrolytic (NPE) caps like were installed but you can use film caps. You may not like the sound of film especially the cheaper brands. You can add a small value film cap to the NPE for a bit more detail. I don't know of anyone still making a 20uF NPE cap. You could go with a 18Uf and add a 1.5uF film. Film are MORE expensive.

https://www.partsconnexion.com/JANTZEN-88641.html

https://www.partsconnexion.com/MUNDORF-70369.html

 

[lARrybody]

Hello Kevin Wheeler and welcome to the Classic Speaker Pages Forum.  I am half Wheeler, that being my mothers madden name. One of my sons is a Kevin and his son(my grandson) is also a Kevin. We are direct descendants of General Joe Wheeler who fought in the Civil and Spanish American Wars. General Joe is buried in Arlington.

I am assuming that the plastic box you are referring to is the wax filled paper box with the 20uf capacitator and the inductor coil on top. I just disconnected mine and pushed it back enough to fit the new capacitator. Here is what my 4X rebuilt crossover looked like and a drawing that I made.

If you could post some images of your speakers that would be good.  Again Welcome.

[DavidR]

You don't find the Dayton's have a lot of michrophony and white noise? I do. They get under my skin after about 1/2 hr of listening.

[phung diep]

On 7/5/2022 at 8:08 PM, Kevin Wheeler said:

I have three sets of AR4x and one set of AR4xa speakers Iam in the process of redoing. They need a lot of love. Inside they have some differences,even among sets. What is the best recommendation to replace the caps. I have not opened all of them up. Im on my second set.Some have a plastic rectangle, one has a silver can about the size of a c cell battery rated at 20uf 50 vnp. Send help. SOS.

do you still keep those old capacitors? i am looking for them for my project, do you resell them?

[JKent]

On 7/5/2022 at 9:08 AM, Kevin Wheeler said:

I have three sets of AR4x and one set of AR4xa speakers Iam in the process of redoing.

Wow

On 7/5/2022 at 9:08 AM, Kevin Wheeler said:

one has a silver can about the size of a c cell battery rated at 20uf 50 vnp.

That can capacitor "may" be good. Check to see if it's a Sprague Compulytic. Also, see lARrybody's photo. He replaced the volume pot with an L-pad. Good idea.

And please do post photos. Resize to about 100KB or so for best results.

Kent