like i said before,...As an aside, this same tuner also exhibited the same behavior when plugged into the 'tuner out' jack on my Ernie Ball 25k Ohm volume pedal... designed for active basses/active circuit instruments. I accidentally left it plugged in after tuning during a show and noticed the same appreciable drop in volume and loss of top-end.
Invalid Link Removed, for the exact same reason.
a true-bypass stage tuner or an a-b box rigged up to switch between tuning and playing would be a good "zero-loss" way to quickly tune.