The Reference Series are Zapco High-End Class-AB amplifiers, created to offer the best amplifier in its price range, with a classy new design and selected internal components, and to match the best daily-use cars where available space is limited.
Per Zapco: Sanken MN1526/MP1526 complementary output transistors, ELNA RA3 and RFS signal-path capacitors, Revenbi MKPA-B input capacitors, balanced input by RCA with an internal unbalanced-input button, and socket-mounted upgradable OPs (MUSES8820 original, upgradable to MUSES02 or other OPs).
