Pair cymbals. Sound Reduction Cymbals from Total Percussion allow you to PLAY 24/7. Utilising a proprietary Stainless Steel alloy, these cymbals are specifically designed to reduce volume for 24/7 practice, but not enough to lose tone and pitch. SRC cymbals offer a reduced sound playing level for smaller acoustic gigs that can also be mic'd through a PA. SRC cymbals work perfectly in conjunction with Remo Silentstroke drumheads for low volume practice on your own acoustic kit.