AR3A Crossover Capacitor Values

[EastPoint]

Hi folks. The schematic at ClassicSpeakerPages shows three caps--6 uf, 50 uf, 150 uf. However, the schematic at Human Speakers shows 6 uf, 60 uf, 160 uf. Does anyone know if the 60 uf/160 uf version exists, or is this an error? The 50/150 or 60/160 box is not marked for me or I would just look at the markings. Obviously these test higher over time so a capacitor meter will not help.

 

[homebrew]

From Classic Speaker Pages:

https://www.classicspeakerpages.net/library/acoustic_research/original_models_1954-1974/original_models_schematicss/restoring_the_ar-3a/restoring_the_ar-3a_full_pd.pdf

 

[EastPoint]

So the 60/160 thing is just wrong?

 

[tarior]

6, 50, and 150, IIRC, are what I used in my AR3As. Truth be told, it probably doesn't matter either way.

 

[malden]

I wonder if the original capacitor values are still appropriate. The T/S parameters of the individual drivers have certainly shifted after all these years.

 

[GD70]

I’ve restored multiple sets of 3as. Keep the original values.