MOON 310LP Phono Preamplifier

MOON 310LP Phono Preamplifier

The MOON 310LP Phono Preamplifier is built to extract more realism, texture, and dynamic impact from vinyl—without adding noise, glare, or “hi-fi” edge. Its upgraded low-noise power supply and ultra-short signal path help create a blacker background, letting fine cartridge detail and room ambience come through with greater clarity and scale. Designed for serious vinyl listeners using either MM or MC cartridges, the 310LP offers wide-ranging internal adjustments for gain, resistance loading, and capacitance loading—so you can dial in your cartridge precisely instead of settling for “close enough.” You can also choose between RIAA and IEC equalization curves, and take advantage of balanced XLR outputs to reduce noise and improve transparency when paired with balanced gear. The MOON 310LP is part of ListenUp's Moon Phono Preamplifier Collection.

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What It's Good At:

• Delivering a quieter, blacker background for more lifelike vinyl playback
• Matching both MM and MC cartridges with flexible gain and loading adjustments
• Reducing hum and interference with balanced XLR connectivity and smart grounding
• Preserving detail and dynamics with a symmetrical mirror-image circuit layout
• Improving system transparency with RIAA or IEC EQ curve selection
• Upgrading performance further with optional external power supply support

MOON 310LP Full Specifications:

• Type: Phono Preamplifier
• Configuration: Mirror-image symmetrical circuit
• Chassis format: Stylish half-width chassis
• Inputs: Single-ended inputs: 1 pair (RCA)
• Grounding: Ground post for turntable ground lead
• Outputs: Single-ended outputs: 1 pair (RCA)
• Outputs: Balanced outputs: 1 pair (XLR)
• Balanced pin assignment: Pin 1 = Ground, Pin 2 = Positive, Pin 3 = Negative
• Input impedance (adjustable): 47Ω, 100Ω, 470Ω, 1kΩ, 47kΩ
• Input capacitance (adjustable): 0pF, 100pF, 470pF
• Equalization curves: RIAA or IEC
• IEC curve effect: -7dB @ 10Hz
• Gain (adjustable, single-ended outputs): 40dB, 54dB, 60dB, 66dB
• Gain (adjustable, balanced outputs): 46dB, 60dB, 66dB, 72dB
• Signal-to-noise ratio (full scale @ 40dB gain): 110dBr
• Signal-to-noise ratio (full scale @ 66dB gain): 88dBr
• Frequency response (RIAA & IEC): 20Hz – 20kHz (±0.5dB)
• Crosstalk @ 1kHz: -100dB (also listed as 100dB in the manual’s spec table)
• Output impedance: 50Ω
• THD (20Hz – 20kHz): 0.001%
• Intermodulation distortion: 0.009%
• Input overload @ 40dB gain: 58mV RMS @ 1kHz
• Input overload @ 54dB gain: 11mV RMS @ 1kHz
• Input overload @ 60dB gain: 6mV RMS @ 1kHz
• Input overload @ 66dB gain: 3.0mV RMS @ 1kHz
• Power consumption @ idle: 6W
• AC power requirements: 120V / 60Hz or 240V / 50Hz
• External power support: Can be driven with a compatible external power supply (DC Power 4-pin XLR)
• Fuse replacement (per manual): 120V version: 0.1A slow blow (5 × 20mm); 230V version: 0.1A slow blow (5 × 20mm)
• Design features: Large isolated power supply on a separate circuit board using a toroidal transformer with 2 stages of voltage regulation
• Design features: Power supply voltage regulation includes i2DCf (Independent Inductive DC Filtering)
• Design features: Power supply features custom MOON electrolytic capacitors
• Design features: 4-layer PCBs with pure copper tracings for a shorter signal path and improved S/N
• Design features: Symmetrical circuit design with carefully matched high-quality components
• Design features: Designed to be powered up continuously for optimal performance (per manual guidance)
• Dimensions (W × H × D): 8.0 × 3.25 × 11.0 in / 17.8 × 7.6 × 28.0 cm
• Additional dimensions listing (product page): 7.0 × 3.0 × 11.0 in / 17.8 × 7.6 × 28.0 cm
• Shipping weight: 7.0 lb / 3.1 kg (also listed as 7 lb / 3 kg)
• In the box: AC power cable / AC power cord
• In the box: Owner’s manual
• In the box: Warranty and product registration information (USA and Canada only)

MOON 310LP Q&A:

What type of cartridges does the MOON 310LP support—MM, MC, or both?

The 310LP supports both moving magnet (MM) and moving coil (MC) cartridges, with internal adjustments to match gain and loading for each type.

Can the 310LP be tuned to match my specific cartridge?

Yes. Internal jumper settings allow you to adjust gain, resistance (impedance) loading, and capacitance loading to better align with your cartridge’s requirements.

What loading options are available on the 310LP?

Input impedance can be set to 47Ω, 100Ω, 470Ω, 1kΩ, or 47kΩ, and input capacitance can be set to 0pF, 100pF, or 470pF.

Does the 310LP offer different EQ curves for records?

Yes. It can be set to either the standard RIAA curve or the IEC curve, which applies a subsonic filtering effect (-7dB at 10Hz) to help reduce unwanted low-frequency rumble.

What gain settings are available, and do they change with balanced output?

For RCA output the gain is adjustable to 40/54/60/66dB, and for balanced XLR output it’s 46/60/66/72dB, helping optimize noise and headroom with different cartridges and systems.

When should I use the balanced XLR outputs?

Use XLR outputs when connecting to a balanced preamp or integrated amplifier to help lower noise, improve dynamics, and increase midrange transparency.

Can I upgrade the 310LP with an external power supply?

Yes. The unit can be driven by a compatible external power supply via its DC Power connection for further performance potential in the right system.

What’s included in the box?

The 310LP includes an AC power cable/cord, the owner’s manual, and warranty/product registration information (USA and Canada only).

MOON 310LP Downloads:

MOON 310LP Manual
MOON DAC Comparison Chart