Bottlehead Kits > Mainline

Running balanced and unbalanced at the same time.

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Strikkflypilot:
Hi.

My Mainline is usually run with HD800s with balanced cable.
Today I also hooked up my modded HD580s to the unbalanced jack.
I would imagine it should be possible to hear a slight difference with an additional 300ohms headphone connected while listening to the HD800, but I heard no difference.
(Doctor, is this normal...?)

Doc B.:
The output impedance of the amp is low enough that halving the load from 300 ohms to 150 ohms by paralleling two high impedance headphones (it's actually a bit more complex due to the balanced/unbalanced setup) really won't affect the output level that much. Lower impedance cans may have more influence.

Strikkflypilot:
That explains it.
Thank You very much.

Paul Birkeland:
If the balanced/unbalanced switch is left on unbalanced, you should be able to do this without any issues.

-PB

Strikkflypilot:
The switch made a difference, like before, but, left balanced, listening to HD800, I could not distinguish whether or not the HD580(unbalanced) was connected.

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