Jolida Music Envoy

Jolida Music Envoy: Tube Preamplifier

Four tubes, three dedicated power supplies, a complete phono stage: this preamplifier concentrates the expertise acquired by Jolida since 1983 in the design of tube electronics. The Music Envoy occupies the top of the American manufacturer’s range and embodies its design philosophy where the robustness of power supplies directly determines the quality of sound reproduction.

An Architecture Designed for Stage Isolation

Jolida’s approach to the Music Envoy is based on multiple independent power supplies. Three separate power supply circuits each serve a gain stage, while a fourth power supply is entirely dedicated to the phono section. This separation aims to prevent interactions between stages and maintain sufficient current reserve during demanding musical passages.

The preamplification circuit is built around four tubes: two 12AX7 and two 12AT7. These classic references, widely available from numerous manufacturers, facilitate replacement or experimentation with different brands according to listening preferences. The tubes are individually shielded to limit radio frequency interference and mechanical vibrations that could introduce noise into the signal.

A Configurable Phono Stage for MM and MC Cartridges

The Music Envoy’s phono section stands out for its flexibility. Compatible with both moving magnet and moving coil cartridges, it offers gain, capacitance, and load settings accessible via DIP switches located on the rear panel. A diagram engraved on the panel indicates the positions corresponding to different cartridge types.

This section occupies its own fully shielded metal sub-chassis, a precaution that helps maintain a very low noise floor despite the high gains required for MC cartridges. The signal-to-noise ratio exceeding 100 dB and harmonic distortion below 0.03% demonstrate the care given to this part of the circuit. For systems not using a turntable, the phono input can be disabled and converted to an additional line input.

Connectivity and Remote Control

The rear panel features four RCA line inputs as well as the dedicated phono input. On the output side, three connectors are available: two at fixed level for power amplifiers and one variable level output, practical for driving an active subwoofer or a particularly sensitive amplifier.

The motorized volume potentiometer on the front panel, ALPS type, responds to the supplied remote control. The remote also allows source selection and standby mode. A 12V Trigger connector enables synchronized triggering of compatible amplifiers.

Matching and Implementation

Jolida initially designed this preamplifier as the companion to the Music Envoy 211 tube monoblocks, but its 60-ohm output impedance and 100 kΩ input impedance allow it to work with most power amplifiers, whether tube or solid-state. The frequency response extends from 10 Hz to 100 kHz with a tolerance of ± 1 dB, giving it comfortable headroom at both ends of the spectrum.

The tube warm-up time remains modest (a few minutes are sufficient to reach nominal operating temperature), and power consumption remains reasonable for a device in this category.

Technical Specifications

Configuration

• Tube preamplifier
• Tubes: 2 × 12AX7, 2 × 12AT7

Audio Performance

• Frequency response: 10 Hz to 100 kHz (± 1 dB)
• Signal-to-noise ratio: > 100 dB
• Harmonic distortion: < 0.03%
• Input impedance: 100 kΩ
• Output impedance: 60 Ω

Connectivity

• Inputs:
  • 4 stereo RCA line inputs
  • 1 phono input for moving magnet / moving coil (MM/MC)
• Outputs:
  • 3 line outputs (including one variable level)

Physical Characteristics

• Dimensions (W × H × D): 430 × 100 × 320 mm
• Weight: 11 kg
• Accessories: remote control included