From jake92028@yahoo.com Wed Feb 06 20:30:58 2008
Subject:Re: Motion Sound Pro3T NEW TUBE?

Why? There isn't really any timestamp or particular date that you must
replace the Pro3T preamp tube. You replace it when it wears out. If
it's still working well, don't worry about it. Under fairly heavy use
you might expect to hear some tube-related problem in about five years.
Under light use like once or twice a week, you ought to be able to
double or triple that - unless you have a specific preamp tube related
problem. They put good tubes in 'em at the factory. Wj