Pearl's UltraSound snares feature patented Graduated Tension wires with strategically positioned looser and tighter wires. The looser wires respond to the lightest touch while the tighter wires maintain head contact during the loudest playing. The SN-1420I has even tension snare wires for those who want traditional snare dynamics, but with the benefits of the UltraSound's rust proof snare wires and ultra-thin, low mass 0.6mm Phosphor Bronze end plates for ultra quick response.