MS-12B

About the MS-12B

The YAQIN MS-12B is a vacuum tube preamplifier and phono stage that supports use with CD/DVD players as a preamplifier and with moving magnet (MM) cartridge turntables as a phono stage. It features dual stereo outputs with selectable output voltages of 0.25V for integrated amplifiers and 0.7V for power amplifiers or second gear use, allowing for flexible system configurations including bi-amping. The unit employs 12AX7 tubes for the phono voltage amplifier stage and 12AU7 tubes for the voltage amplifier stage. It uses DC filament power supply to minimize humming noise and conventional active RIAA equalization for the phono stage. The power transformers are made with silicon steel sheets and high-quality oxygen-free enameled copper wire, ensuring robust and clean power delivery. The MS-12B has a frequency response of 15Hz to 100kHz (-2.0dB), harmonic distortion of ≤0.2% for the preamplifier and ≤0.5% for the phono stage, and signal-to-noise ratios of >75dB for CD/DVD input and >65dB for phono input. It operates on AC115V 60Hz power supply, weighs approximately 3.0kg, and measures 17cm (W) x 38cm (D) x 16cm (H). The package includes the MS-12B unit, a power cable, and a manual. This model is not indicated as discontinued and remains available from some suppliers.