Evans 22" EQ4 Clear Bass Drumhead hbatch010 The 12-Stage Phaser's control parameters

The 12-Stage Phaser's control parameters are Sweep frequency

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It also acts as its own gate to bring the modulated signal in or out

Evans 22" EQ4 Clear Bass Drumhead hbatch010 The 12-Stage Phaser's control parametersFor over 60 years, Evans has been an innovator in drumhead manufacturing and design. As the creator of the first synthetic drumhead and other revolutionary products such as EMAD, Hydraulics, and the UV1 series, Evans drumheads are designed with the intent of solving problems for drummers. Regarded for high quality and consistency all Evans drumheads are made in the USA and feature Level 360 Technology. Evans EQ series features a single ply of 10mil