Moonriver 404 Integrated Amplifier
MOONRIVER 404: £3299
MM PHONO CARD: £449
MM/MC PHONO CARD: £549
SPDIF DAC CARD: £549
USB DAC: £799
The Moonriver Model 404 is the result of three years of intensive research aimed at achieving exceptional performance across all price ranges. Designed to uncover hidden details and textures in any audio format, it sets new standards in tone integrity and nuance. Its versatility makes it ideal for all music genres, with the source, speakers, and room being the only defining limits.
Features & Flexibility
The Moonriver 404 offers a comprehensive suite of features, including:
Integrated Phono Stage: Supports MM or MM/MC cartridges.
USB DAC: Enables high-quality digital audio playback with an asynchronous architecture.
Preamp Outputs: Two outputs allow easy integration with other components.
Tape Monitor Loop: Adds functionality for audiophiles using legacy equipment.
This combination of features ensures the amplifier remains a flexible and future-proof centrepiece for any system.
Power Supply & Layout
The Model 404 incorporates five independent power supplies, each equipped with overload protection. The power amplifier section operates on a dual power supply, ensuring consistent performance and reliability under varying loads.
The Moonriver 404 Integrated Amplifier highlights its meticulous engineering, versatile features, and timeless design. It is an exceptional choice for audiophiles seeking an amplifier that blends tradition with modern innovation.
Performance & Engineering
The Model 404 features a robust power supply section, ensuring ample and stable power delivery at every stage via separate rails. A fully discrete preamp section enhances dynamic precision, while the high-output stage is optimised for bandwidth and minimal distortion, ensuring neutral and transient fidelity. Carefully selected components preserve natural tonality, avoiding unnecessary colouration while maintaining sonic purity through the shortest feasible signal path.
Design & Usability
The Model 404 is built with a clear vision: a classic aesthetic with a modern touch. High-quality materials such as massive aluminium knobs, solid walnut side panels, and a robust enclosure reflect timeless craftsmanship. The interface is designed for intuitive operation, featuring:
Four knobs and three switches for direct access to all functions.
An ergonomic layout that eliminates the need for user manuals.
Moonriver Audio rejects unnecessary "minimalist" trends, ensuring simplicity without compromising usability.
Balance Control
In contrast to modern trends that exclude balance control, the Model 404 includes this critical feature to address real-world listening environments. Balance control allows users to adjust for speaker placement asymmetry or uneven room acoustics, ensuring a proper soundstage and stereo effect. Implemented in parallel, the balance control does not degrade the audio signal, preserving the integrity of the sound.
Phono Stage Module
Available in two options: MM only or MM/MC selectable. Both ensure low noise and high performance, with adjustable gain and customisable MC input load for cartridge flexibility.
SPDIF DAC Module
This module is powered by the 9000-series ESS Sabre DAC chip, which supports PCM up to 192kHz/24-bit. It features independent power supplies, a massive 42,000µF capacitor bank, and a finely tuned analogue output stage for Moonriver's dynamic and natural sound.
USB DAC Module
Supports PCM up to 384kHz/24-bit and DSD up to 128. Equipped with a 9000-series ESS Sabre DAC chip, low-drift clocks, and custom firmware, this module offers precise digital-to-analogue conversion with five independent power supplies and Moonriver's signature sound voicing.
These modular options ensure the Moonriver 404 adapts to evolving audiophile needs, delivering unmatched flexibility and long-term value.
Useful Documentation - 404 INTEGRATED
To utilise the USB input of the optional DAC board, you need to install a specific driver for Windows computers; this driver is not required for MAC and Linux systems. You can download it below:
404 INTEGRATED SPECIFICATIONS
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
Frequency response:
10 Hz to 50 kHz
Max output power:
50 W per channel into 8 Ω
Total harmonic distortion:
0.05%
Signal-to-noise ratio:
85 dB (line)
Idle Consumption:
22 Watts
Dimensions:
430 (W) x 390 (D) x 135 (H) mm
Weight:
12 Kg
FINISHES:
Black, Natural Wood
warranty:
3 Years