I've been rolling on and off with an Underwood since 92. I am using it currently through an EA Doubler and a custom Schroeder 1X10 4 ohm 400 watt cab...it sounds great! I can hear myself clearly with other players, and sounds great out front. Never tried a Schertler or an Ehrlund, but this is working well for me. I haf one with the old non 1/4" jack. I called them up, and they sent me a new jack, ziptie and plastic tubing for free. GOOD folks....very thankful for both them, and my sound.
Jacochops and Wilbyman...President and Vice-President of the Uber-High End 4 string Addicts Club