The V4/04 is a four channel QVC interface amplifier, providing a low cost, space efficient solution to multi channel piezo-tronic transducer interfacing at the expense of somewhat reduced flexibility. Each channel provides switched normalised outputs of 1 or 10g/V for transducer sensitivities of 10, 31.6, or 100mV/g. Gain is thus adjustable over the range x1 to x100 in 10dB increments.