Transparency note: This research-based review uses Meze’s official 109 Pro page and specifications. We did not perform hands-on sound, source, comfort, measurement or durability testing. Descriptions of natural, vibrant or detailed sound are manufacturer claims or cited opinions, not our findings.
Quick answer: Meze 109 Pro is a wired open-back headphone with 50 mm dynamic drivers, 40-ohm impedance and walnut earcups. Its high stated sensitivity makes source matching easier than many high-impedance models. At 375 g, fit and weight distribution deserve a long trial.
Key specifications
- Dynamic open-back circumaural design
- 50 mm drivers
- 40-ohm impedance
- 112 dB SPL/mW at 1 kHz
- 5 Hz–30 kHz stated frequency range
- THD below 0.1% at 1 kHz
- 375 g
- Dual 3.5 mm earcup inputs and walnut cups
Open-back use comes first
The open grille allows sound to pass behind the driver. This is central to the intended spacious presentation, but it means nearby people will hear music and room noise will remain audible. The 109 Pro is for quiet home or studio listening, not commuting or shared offices.
It should also be kept away from recording microphones when leakage matters. No cable, pad or amplifier can turn an open headphone into an isolating design. If privacy is important, compare the closed Meze 99 Classics instead.
Driver construction and published claims
Meze uses a 50 mm dynamic driver with separate materials chosen for the dome, surround and stabilising components. These engineering details explain design intent, not the final tonal balance. The 5 Hz–30 kHz range and single THD figure do not replace a full response and distortion graph.
The driver is positioned at an angle and distance intended to fit ear anatomy. Fit can influence treble and imaging, so independent measurements should be read alongside personal listening. Pad wear changes the ear-to-driver relationship over time.
Source requirements
A 40-ohm load and 112 dB SPL/mW sensitivity suggest that many interfaces, dongles and portable players can reach adequate level. A dedicated amplifier is not automatically required. Check the existing source for clean headroom and low noise before spending on extra hardware.
Dual 3.5 mm inputs make the cable replaceable. Balanced aftermarket cables may suit a particular output, but the connector does not guarantee audible improvement. Level-match any comparison and prioritise reliable fit and length.
Comfort, materials and serviceability
At 375 g, the 109 Pro is heavier than many dynamic open headphones. A self-adjusting headband and large velour pads distribute the load, but neck sensitivity and head shape remain personal. Test it for at least an hour.
Walnut grain and colour vary naturally. The construction uses replaceable components and detachable pads and cables, supporting long ownership. Premium materials add visual and tactile value, but they do not prove acoustic superiority.
Pads and long-term ownership
Velour pads are replaceable wear items and influence ear distance, seal and perceived balance. Inspect availability and cost before long-term ownership. The self-adjusting suspension and metal structure reduce disposable complexity, but natural wood and finished surfaces still require careful storage.
Who should buy it?
Choose 109 Pro for quiet-room listening, easy electrical drive, serviceability and wood craftsmanship. Skip it if isolation, very low weight, portable folding or a microphone is required. The premium over simpler open models should be justified by fit and preference.
Alternatives and verdict
The 99 Classics is closed, the HiFiMAN Sundara is a planar alternative, and the HD 660S2 is lighter but harder to drive.
Meze 109 Pro combines an accessible electrical load with premium, serviceable construction. Its limitations are equally clear: 375 g weight, full leakage and a premium price. Auditioning determines whether the materials and fit justify the cost.
Primary source: Meze 109 Pro official product page and specifications.