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I am not sure!you will need to test it I never did.Ari
I have tried the Blue capsule with the AKG reduction ring on a modified 460B body. The 460 has a 10 gig ohm input impedance and feeder resistor unlike the 451/2 which is 1 gig ohm. The 40 volt Blue capsule will charge up in the 460B, but a CK-4 1" capsule will not. The sound was OK, another flavor of EQ capsule, but I prefer flat capsules regardless of the size. It also fits on the C-60/1 bodies for the Nuvistor tube sound.Jim WilliamsAudio Upgrades