BA500 mic pre uses 1 of our discrete 99v opamps (New +/-16v version) to provide 60dB of gain. It is aimed at getting big but realistic vocals and acoustic instruments like our Dual99v500 but BA500 can onlydo 60dB of gain. With the impedance control 200 to 3k it goes from dark and slow to airy and fast tone wise. A centre detent at Z is the best starting point. Also has large fully buffered white LED backlit 34mm VU meter showing output level.