Moonriver Audio 404 Reference Integrated Amplifier

Moonriver Audio 404 Reference Integrated Amplifier


Brilliant amp from Moonriver. Superior sound!

Line level: £4495  – MM phono option: £4870  – MM/MC phono option: £5,020

The Moonriver Audio 404 is built like amplifiers used to be built, hand made in Sweden using traditional through-hole soldering – it can be easily maintained and serviced without the need to replace entire electronic board assemblies.

Moonriver products are designed and made in Sweden.  Each unit is hand-assembled, a painstaking but precise procedure.  Sophisticated research and efficient development followed by extensive listening tests leads to selection of the right components for a no-compromise audiophile sound.


Following the runaway success of The Moonriver Model 404 (Standard), Moonriver Audio decided to move a step further by improving on the already excellent design platform of the Standard 404 model. The Moonriver Model 404 Reference achieves even better performance over the Standard Model, while retaining a sensible price point.

Just like the Standard Model 404, the 404 Reference amplifier will extract hidden elements, and render textures from within any audio format; but with the capability to drive any speaker on the market – despite its moderate power. Only the source, speakers and room will set the performance limit. Its culture will suit all music, as the Model 404 is by design, set to define the faintest nuances of which tonal integrity is composed.



  • 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

  • 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

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