Moonriver Audio are proud to announce a new model, the 404 Reference integrated amplifier which is the improved version of the Standard model.

Following the runaway success of the standard Moonriver Model 404 the Reference version moves further, by  improving on the already excellent design platform of the Standard 404 model. The form, controls, ergonomics and design are similar, but the major difference is found at the heart of the amplifier: the power supplies.

The power supplies for both preamp and power amp have double the capacitance, which gives a big advantage in how the Reference handles the incoming signal. The dynamic character of the amplifier digs out more detail, and low level information; the sound stage is much deeper and articulate; the space between instruments is vast, while the bass has greater authority and is more confident than ever before. The texture of each individual instrument is exposed exponentially in comparison with the Standard version.

The Moonriver 404 Reference can drive most speakers in the market to significant levels. WBT nextgenTM speaker terminals ensure the massive flow of current from the amplifier’s output stage to the speakers. The 404 Reference chassis reduces unwanted resonant vibrations even further with absorbent materials, and better integral mechanical support.

The Moonriver 404 Reference must be auditioned to fully savor its enhanced performance.

Retail Price in U.S. $4,995
Retail Price in Europe & Asia €4490

Shipping in December 2020.

Both the 404 and the 404 Reference will continue to enjoy new optional modules in the years to come.


  • Inputs: 5 (line 1 and 4 optionally occupied by phono stage and USB DAC respectively, 1 x tape loop)
  • Outputs: 2 x preamp out, 1 x rec out
  • Max output power: 50 W / channel into 8 Ω
  • Frequency response: 10 Hz to 50 kHz
  • Total harmonic distortion: 0.05%
  • Signal to noise ratio: 85 dB (line)
  • Idle Consumption: 22 Watts
  • Dimensions (mm): 430 (W) x 390 (D) x 135 (H)
  • Weight: 13 kg