The Atma-Sphere preamps utilize a lot of tubes. When you detect a bad tube, tracking it one down is reasonably time consuming.
I owned an MP-1 preamp, and as great as it sounded, the tube maintenance involved was clearly going to be an issue for me, so I sold it.
Something to consider...
I owned an MP-1 preamp, and as great as it sounded, the tube maintenance involved was clearly going to be an issue for me, so I sold it.
Something to consider...

