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river · 3rd December 2007

I have 3 of the Pro MPA's and have rolled the tubes in all of them. Definitely a substantial improvement in sonic quality. I have different tube models in each one, and it has resulted in essentially three different preamps.

3rd December 2007	#2
river Lives for gear Joined: Feb 2007 Location: Nashville, TN Posts: 1,189	I have 3 of the Pro MPA's and have rolled the tubes in all of them. Definitely a substantial improvement in sonic quality. I have different tube models in each one, and it has resulted in essentially three different preamps.