Audeze MM-520 – Open-back planar reference

The Audeze MM-520 is an open-back planar headphone built for engineers who need a mix to translate everywhere it plays, and for listeners who want that same honesty at home. The successor to the MM-500, it was voiced with 18-time Grammy-winning mix engineer Manny Marroquin. Stocked at Soundium.

Key Features

• 90 mm planar magnetic drivers: Ultra-Thin Uniforce diaphragms for low distortion across the band.
• SLAM technology: Symmetric Linear Acoustic Modulator for low-end articulation, impact and spatial detail.
• Fazor phase management: Tightens phase behaviour and reduces distortion.
• Easy to drive: 102 dB/1mW sensitivity and an 18 ohm load run cleanly from an interface or DAC headphone output.
• Magnetic memory foam earpads: Upgraded pads detach magnetically for quick replacement.
• Manny Marroquin Signature: Co-developed with the Grammy-winning engineer, following the MM-500.

Customer Benefits

A reference open-back earns its keep by telling you the truth, and the MM-520 is built to do that without a dedicated amp in the chain. The Neodymium N50 Fluxor array and 90 mm Uniforce diaphragms keep distortion low while SLAM gives the low end real articulation, so kick and bass decisions hold up from the room to the car. Because it sits at 18 ohms and 102 dB, you get full level straight from an interface, and the magnetic pads mean a worn set is a 10-second swap, not a service trip.

Quick Specs

• Style: Over-ear, circumaural, open-back
• Driver: 90 mm planar magnetic
• Magnet: Neodymium N50 (Fluxor array)
• Diaphragm: Ultra-Thin Uniforce
• Frequency response: 5 Hz – 50 kHz
• Impedance: 18 Ω
• Sensitivity: 102 dB/1mW (at Drum Reference Point)
• THD: <0.1% @ 100 dB SPL, 1 kHz
• Max SPL: >130 dB
• Max power: 5 W RMS
• Weight: 555 g

What's in the Box

• MM-520 open-back planar magnetic headphones
• Premium braided cable, dual mini-XLR to 6.3 mm (1/4") TRS
• 6.3 mm (1/4") to 3.5 mm headphone adapter cable
• Hard travel case

Ideal For

Mixing and mastering, critical studio monitoring, open-back reference listening.

Compatibility

Drives cleanly from interface and DAC headphone outputs thanks to the low 18 Ω impedance and 102 dB sensitivity, with a minimum recommended power above 100 mW.

Pros & Cons

• ✅ Runs to full level straight from an interface or DAC output
• ✅ Magnetic earpads swap in seconds
• ✅ Open-back planar stage with low distortion

• ⚠️ Open-back leaks sound, so not for tracking in the room or shared spaces
• ⚠️ At 555 g it makes its presence felt over very long sessions

If you want a planar reference that stays honest without a separate amp in the way, the MM-520 belongs on your desk. Shop the Audeze MM-520 at Soundium.