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Ray P
Reply with quote  #1 
As I now have 600ohm BeyerDynamic headphones it occured to me that I could optimise the Masterpiece output capacitor if I only use the BeyerDynamics (entirely reasonable given that they're the best headphones I've owned).

I've used an online calculator ( and for a 600ohm load a 47uF cap gives a -3Hz point at around 6Hz (or a 10uF gives 25Hz, which seems reasonable for headphone use). Either of these points offer the opportunity to use a film cap.

Any comments/observations?
Capt. Z
Reply with quote  #2 
You can always experiment with cheap caps first to see what difference in sound it makes.

Then when you find what you like you can replace them with some more expensive boutique caps, if you still have the urge to 'upgrade'. 
Ray P
Reply with quote  #3 
Cheers Capt. Z, that's what I plan to do.

In Bruce's 'stock' Masterpiece with a 1000uF output cap and assuming 32ohm headphones the -3dB point is at 4.97Hz so I'll go with a cap to get around the same rolloff; a 57uF (56uF + 1uF bypass) will give me -3dB at 4.65Hz
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