 The Aikido PH-2 phono stage is based on the Aikido topology, which makes perfect sense, as the Aikido’s low distortion, noise, and output impedance, without the use of negative feedback—all are highly desirable attributes in a phono preamp. Our goals always remain constant: high-gain, low-noise, and low output impedance. $59.00 |  Power supplies and voltage regulators for low-voltages. Heaters and solid-state circuits do not need high-voltage power supplies, but they do require high current delivery. |