Hifiman Prelude Fully Balanced Headphone Amplifier (Open Box)

PRELUDE Fully Balanced Class A Headphone Amplifier

Full Balanced Class A MOS-FET High Current Output

The fully discrete architecture features a precise, single-ended balance conversion circuit that renders the single-ended RCA input balanced fully balanced.

The input stage employs a fully balanced amplifier architecture, with precise, single-ended/balanced conversion. The pre-amplifier circuit is independent, adopting a class A output structure, with excellent power and natural timbre.

ALPS Potentiometer

The potentiometer ensures complete and accurate channel balance.

A customized high-power, low-noise toroidal transformer, with multi-channel high-speed low-noise voltage regulator circuit, supplies power for the headphone amplifier.

Fully balanced headphone protection circuit

The housing is manufactured from a single piece of aluminum, which helps isolate harmful resonance that negatively affects sonic output.

FRONT

• Combo Jack: XLR 3-Pin Balanced Output
• Combo Jack: 6.35mm Single-ended Output
• XLR 4-Pin Balanced Output
• 4.4mm Balanced Output
• Volume Control
• Input Selection
• Gain Selection
• Output Selection
• OLED Display (Current Input, Current Output, Current Gain)

BACK

• AC Power Connector (110V default setting)
• Pre-Amp Output: XLR Balanced
• Pre-Amp Output: RCA Single-ended
• Audio Input: RCA Single-ended
• Audio Input: XLR Balanced

Specifications

• Frequency Response: 20-50KHZ, ±1dB@1KHz
• Signal to Noise Ratio: -113dB @1KHz
• THD+N: 0.0009%, low gain, @1KHz
• Power Output: (0.1% @1KHz, balanced) 10W@32Ω, 6W@64Ω, 2.5W@150Ω, 1W@300Ω, 560mW@600Ω
• Total Power Consumption: <50W
• Dimension (L*H*W): 330*56*260mm, protrusions not included
• Net Weight: 6.5KG