

Moonriver 505 Hybrid Phono Stage
MOONRIVER 505 PHONO STAGE: £4499
Designed for Vinyl Enthusiasts
The Moonriver 505 Hybrid Phono Stage is a versatile, high-performance solution for vinyl enthusiasts, designed to meet the needs of discerning audiophiles. Four dedicated inputs allow seamless integration of multiple turntables, tonearms, and cartridges. Its intuitive design supports on-the-fly adjustments using dedicated knobs and switches, enabling precise tuning for both MC and MM cartridges without the hassle of powering down or accessing internal components.
Features & Flexibility of the Moonriver 505 Phono Stage
Versatile Gain Control: This feature allows for fine adjustment of gain to match a wide range of cartridges, ensuring optimal performance.
Selectable Loading Options: Customisable load impedance to tailor the sound to your preferences and cartridge requirements.
High-Quality Build: Crafted with premium components to deliver exceptional sound quality and longevity.
Balanced and Unbalanced Outputs: Offers balanced and unbalanced connections, enhancing compatibility with various systems.
Crafted in Sweden
Hand-assembled in Sweden, the 505 reflects Moonriver Audio's commitment to sustainability, reliability, and unparalleled sound quality. Covered by a 3-year warranty, it is built to deliver exceptional performance for decades.

Hybrid Circuit Design
The hybrid circuit design combines ultra-low-noise IC op-amps for precision with discrete solid-state circuits that deliver lifelike dynamics and drive. This approach ensures the perfect balance of resolution and musicality, capturing every nuance and preserving the soul of the music. The 505 ensures an engaging, natural listening experience by emphasising accurate timbre reproduction and midrange richness.

PCB Layout and Noise Isolation
The meticulously crafted PCB layout focuses on noise isolation, minimal components in the signal path, and double shielding for the transformer and active gain circuits. This minimises interference and negates the need for an external transformer, further enhancing performance.
Power Supply
The Moonriver 505 Hybrid Phono Stage is powered by six independent power supplies, including a substantial 70,000µF total capacitance. Designed in a dual-mono configuration, each stage features its own dedicated power supply, incorporating linear discrete regulators and discrete noise rejection circuits for optimal performance and reduced interference.
Active Gain Stage
With ultra-low-noise active gain stages, the Moonriver 505 achieves a maximum gain of 72dB (4,000x amplification) in MC mode. Separate input stages for MM and MC settings employ op-amps specifically chosen for each type, ensuring optimal signal integrity. Air-sealed, low-impedance relays handle all settings for precision and reliability. Additionally, a discrete, high-current output circuit delivers lifelike dynamics and natural sound reproduction.

Microcontroller Operation with Memory Function
A built-in microcontroller silently manages all functions and automatically stores individual settings for each of the four inputs. Switching inputs recalls the last-used settings, enabling seamless operation. Whether connecting 4 MC cartridges, 4 MM cartridges, or a mix of MM and MC, the 505 allows full flexibility with unique settings tailored to each input.
De-Emphasis EQ
The Moonriver 505 features a passive de-emphasis circuit for an exceptionally flat frequency response with minimal signal interference. It includes two equalization curves: RIAA for standard playback and DECCA or COLUMBIA for 78rpm records. Both EQ circuits are engineered using a minimalistic approach, incorporating high-precision, audiophile-grade components for uncompromising accuracy and performance.
505 PHONO SPECIFICATIONS
Inputs:
4
XLR and RCA inputs & outputs
Minimum gain:
34 dB
Capacitance values:
100, 220, 330, 470, 680pF
Maximum gain:
72 dB
MC load impedance:
10, 47, 100, 470, 1KΩ and custom
MM load impedance:
22K, 47K, 75KΩ
De-emphasis curve:
RIAA and Decca or Columbia
Functions & FEATURES:
Stereo or Mono
Separate shielding for the transformer and gain stages
Auto mute function
Dimensions:
430 (W) x 390 (D) x 135 (H) mm
Weight:
12 Kg
FINISHES:
Black, Natural Wood
warranty:
3 Years