Atma-Sphere MP-3 Mk 3.3

The MP-3 preamplifier is based on the concepts pioneered by our MP-1 preamp, now in a single-chassis package. Recently updated to Mk. III.2, the MP-3 is a fully differential all-tube preamplifier, with a direct-coupled high current output capable of driving low-impedance balanced-lines. Like our MP-1, the MP-3 easily drives interconnects over 200 feet long! The MP-3 extracts more ambient information with greater image specificity, bass definition and dynamic range than any single-ended preamplifier. Furthermore, it perfectly complements the balanced design of our Music Amplifiers or any balanced power amplifier. The patented innovations, developed specifically for this preamplifier, have allowed the MP-3 to rise to the top.

In addition to its remarkable line section, the MP-3 works well with low-output moving coil cartridges and uses a minimum of connections in the front panel wiring and controls. A low number of gain stages (only three from phono input to line level output) insures the low distortion, wide bandwidth and superb dynamic range. The result is a truly musical package with exceptional value.

  • Balanced Differential Design®
  • XLR connectors for phono and auxiliary inputs
  • XLR output connections
  • Patented direct-coupled Circlotronic® output
  • Zero feedback design throughout
  • Balanced differential passive phono equalization
  • Precision 23 position stepped volume control built with 96 resistors on a custom built switch
  • Two tape monitor inputs, tape functions use RCA jacks
  • Precision components used throughout
  • Total system phase switch
  • Low-noise "star" grounding topology
  • Three-year general coverage warranty with one year warranty on output tubes


$4,990.00 (linestage only)
$5,990.00 (with phono stage)

Optional Features

  • Remote Volume Control: $950
  • Power supply regulation: $700
  • V-CAP Copper foil capacitors for line stage: $600
  • V-CAP Copper foil capacitors throughout: $1,900
  • Caddock resistor package: $2,160
  • Caddock volume control: $2,990
  • Low output Moving-Coil step-up transformers: $750 (for cartridges under 0.2 mV).
  • Damping package: $600
  • Dual outputs: $75