Check the listing for details. Strymon PCH-X1 Active Mono DI Isolater. Condition: New. Listed at 199.00 USD. Set Your Signal Up for Success Sweetwater studio engineers painstakingly scrutinize every part of their signal chains to ensure they're getting the best audio quality possible, and this is why they're raving about the new PCH-X1 active DI box from Strymon! This 1-channel, phantom-powered active DI isolator is equipped with a custom isolated audio transformer that facilitates astonishingly low total harmonic distortion (THD) and a flat frequency response for the most accurate, pristine-sounding signal possible. Strymon goes the extra mile by featuring a built-in 3-position highpass filter (HPF) for cleaning up muddy mixes and cutting low-end distortion alongside an integrated Ground/Lift switch for deftly attenuating 60-cycle hum and unwanted noise.