At the heart of the World Famous Philharmonic snare drum is the revolutionary SR-500 strainer system. The Triad Silent Strainer System provides three individual tension adjusters allowing you to fine tune the optimum tension for each type of snare material mounted on the drum and a single global adjustment knob on the butt side for quick overall tension adjustments.
A proprietary combination of three unique snare sets(coated cable, stainless cable & snappy wire) using both graduated and even tensioning, offers seamless timbre overlapping and ultra-smooth dynamic transition, plus a greatly extended dynamic and sensitivity range. All snares can be effortlessly changed by simply loosening the adjuster and one drum key rod.
 "Pearl Snare Drums - Pearl Philharmonic Field Drum")