pro-ject tube box ds phono preamplifier

Specifications:

dual-mono design using two dual-triode ECC83 (12AX7A) vacuum tubes for optimal channel separation
compatible with moving magnet and moving coil phono cartridges
pre-mounted Cool Dampers reduce vacuum tube vibration for lower distortion and provide better heat dissipation for longer tube life
front-panel input impedance control for low output moving coil cartridges (continuously variable from 10-1000 ohms)
adjustable input capacitance and gain settings for more accurate cartridge matching
audiophile-grade polypropylene capacitors
switchable subsonic filter to reduce low-frequency rumble and wasted amplifier power (-18dB/octave at 20 Hz)
all-metal chassis for improved shielding from vibration and electromagnetic interference
external power supply for reduced noise and interference
gold-plated RCA connectors for corrosion-free signal transfer
capacitance settings: 47pF, 147pF, 267pF, and 367pF (for MM and high-output MC cartridges)
gain settings: 40dB, 50dB, and 60dB
RIAA response accuracy: 0.5dB (20-20,000 Hz)
THD: less than 0.1%
signal-to-noise ratio: 93dB
4-1/16"W x 2-15/16"H x 6-1/16"D