ZSYS z-Q6 6 channel digital parametric equalizer (Used) From Sterling Product Description The z-Q6 was designed from the ground up specifically for the surround-sound mastering suite for the ultimate in surround mastering. The z-Q6 six-channel digital mastering equalizer incorporates Z-Systems’s proprietary digital signal processing algorithms, intuitive user interfaces, and the highest-quality parts. Featuring six channels [...]