Reviews
The AD-50 is a high-performance phono equaliser amp board suitable for use in various Accuphase preamplifiers or integrated amplifiers. It features the latest circuit topology and carefully selected high-quality materials for lowest noise and extremely precise RIAA equalisation with minimum deviation. This brings out the sonic character of every phono cartridge, letting the listener fully enjoy the enchanting music qualities of analogue records.
Gain: 66 dB
Input Impedance: 30/100/300 ohms (selectable)
Sensitivity: 0.126mV
Frequency Response (20Hz~20kHz): ±0.3dB
S/N Ratio: 84dB
Gain: 40 dB Input
Impedance: 47 kilohms
Sensitivity: 2.5mV
Frequency Response (20Hz~20kHz): ±0.3dB
S/N Ratio: 86dB
MC/MM switching can be performed with the controls on the front panel of the amplifier. For MC, the impedance most suitable for the cartage in use can be selected (30/100/300 ohms). The board also incorporates a subsonic filter set to 25Hz at -12dB per octave, to cut ultra-low frequency noise and woofer flutter cause by record warps which could otherwise affect reproduction quality in the audible spectrum.
The Accuphase AD-50 Phono Stage Board is designed for vinyl enthusiasts who want to add high-quality analogue playback directly into a compatible Accuphase integrated amplifier or preamplifier, without the need for an external phono stage. It suits listeners who value system simplicity, clean signal paths, and seamless integration within a carefully matched Accuphase setup.
This option board is ideal for owners of entry-to-mid level turntable systems using moving magnet or moving coil cartridges who want a clear upgrade in musicality, detail retrieval, and tonal refinement. It is particularly well suited to compact high-end systems where keeping the signal chain short and elegant is a priority.
The AD-50 works best in systems where vinyl is one of several sources, delivering a natural, engaging presentation that enhances listening without adding complexity. It’s a strong choice for those building a neat, high-quality system in small to medium listening rooms where simplicity and performance need to coexist.
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