Ruby P-1

About the Ruby P-1

The Wyetech Labs Ruby P-1 is a premium stereo phono stage preamplifier module that offers extremely accurate RIAA equalization with a deviation of only 0.05 dB. It supports practically all MC and MM cartridges without the need for an external step-up transformer for MC cartridges. The design includes dual-mono architecture with separate +/- power supplies per channel and an outboard power supply featuring shunt regulation and choke filtering for ultra-clean DC power. The phono module uses high-quality surface mount components, non-inductive low noise metal film resistors, and is assembled with precision automated methods ensuring component placement accuracy to 0.1%. Gain is selectable from 40 to 80 dB via DIP switches, with input loading and capacitance also adjustable to match cartridge requirements. The power supply includes multiple large chokes and capacitors totaling 56 Henries and 41,600 µF capacitance, providing exceptional filtering and stability. The unit achieves extremely low noise (0.5 nV/Hz at 1 kHz, 80 dB gain), very low distortion (0.0003% THD at 1 kHz), and excellent channel separation (120 dB). It is designed for audiophiles demanding the highest sonic performance and flexibility in phono preamplification.