sr555The SRA555 is a five string SRA series solid body electric bass model introduced by for 2012. It was produced in China as part of the Standard . The SRA555 features a doubleThe SR555 is a low-noise, hh-bandwidth, fixed-gain current (trans-impedance) amplifier desned to work with SRS lockin amplifiers. Current amplifiers provide gain close to the experimental detector, allowing the user to minimize input