Moondrop Old Fashioned 40mm Dynamic Driver On-Ear Headphone

Retro Walkman Vibes with Modern Hi-Fi Tuning

The Moondrop Old Fashioned is an open-back on-ear headphone that pays tribute to the classic cassette and Walkman era while embracing modern acoustic engineering. With a rare 40 mm large dynamic driver and carefully tuned DF-HRTF response, it delivers a nostalgic yet highly resolving listening experience for music lovers who enjoy both vintage style and contemporary sound quality.

40 mm Large Dynamic Driver – Big Performance in a Compact Form

Unlike most compact open-ear designs, Old Fashioned uses a 40 mm high-performance dynamic driver, precisely integrated through advanced structural stacking. The driver features a three-layer rigid-flex composite diaphragm with optimized damping and resonant frequency control, breaking through the usual low-frequency limitations of mini open-back headphones. The result is deeper, fuller bass with strong impact and excellent control.

This 40 mm driver also achieves outstanding low-distortion performance, with THD ≤ 0.2% (@94 dB, 1 kHz), maintaining clean, transparent sound across volume levels so every note remains clear and detailed.

DF-HRTF Tuning – Warm, Natural Sound Philosophy

Old Fashioned is tuned according to Moondrop’s DF-HRTF (Diffuse Field Head-Related Transfer Function) curve—Moondrop’s interpretation of a natural, lifelike sound signature. Instead of a clinical, overly analytical monitor style, Old Fashioned offers a neutral-warm tonality reminiscent of classic headphones but refined with modern resolution.

• Warm-neutral base: Non-fatiguing and smooth, retaining the comforting character of vintage listening while revealing fine detail.
• Balanced bass: Full and textured low end without boominess or overpowering midrange.
• Natural mids: Lifelike vocals with body and presence for intimate, realistic voices.
• Gentle, extended treble: Detailed yet controlled highs that avoid harshness—ideal for long sessions.

The open-back structure paired with the large driver creates an expansive soundstage with clear imaging and layered separation, evoking the atmosphere of analog vinyl and live performances. From jazz and folk to pop, rock, and chamber classical, Old Fashioned adapts effortlessly, letting music feel pure and emotionally engaging.

Three-Layer Composite Diaphragm – Speed Meets Density

The three-layer rigid-flex composite diaphragm is at the heart of Old Fashioned’s sonic character. By combining materials with different properties, Moondrop achieves an ideal balance between transient speed, frequency extension, and tonal density. The rigid layer keeps treble fast and clean, while the flexible layers give the mid-bass range warmth and weight. This hybrid approach minimizes the drawbacks of single-material diaphragms and delivers a sound that is both agile and full-bodied.

Modular & Detachable Design – Customize Your Fit and Setup

Old Fashioned adopts an innovative modular construction: the earcups and headband are connected via multi-axis ball joints and can be detached easily. This opens the door to future accessories such as ear-hooks or neckband modules, allowing users to configure their preferred wearing style.

• 0.78 mm 2-pin interchangeable cable: Comes with a detachable cable using a reinforced recessed 2-pin connector for durability.
• Audiophiles can swap in upgrade cables or different terminations to suit portable DACs, balanced outputs, or desktop systems.

Easy to Drive – Great Sound Anywhere

With a moderate impedance and high sensitivity, Old Fashioned is extremely easy to drive. Whether you plug it directly into a smartphone (with adapter), a compact dongle DAC, or a desktop interface, it can perform confidently without demanding high-power amplification. This makes it a true plug-and-play portable Hi-Fi option for listening at home, in the studio, or on the go.

Specifications

• Product Name: MOONDROP Old Fashioned 40 mm On-Ear Headphone
• Model: MD-HP-032
• Driver Configuration: 40 mm dynamic driver with three-layer rigid-flex composite diaphragm
• Design: Open-back on-ear, modular earcup and headband structure
• Earphone Jack (on headphone side): 0.78 mm 2-pin
• Cable Plug: 3.5 mm stereo plug
• Frequency Response: 20 Hz – 32 kHz (IEC61094, Free Field)
• Effective Frequency Response: 20 Hz – 20 kHz (IEC60318-4, -3 dB)
• Impedance: 32 Ω ± 15% (@1 kHz)
• Sensitivity: 109 dB/Vrms (@1 kHz)
• Total Harmonic Distortion: THD ≤ 0.2% (@94 dB, 1 kHz)

Package Contents

• 1 × Moondrop Old Fashioned Headphone
• 1 × Detachable 3.5 mm cable
• 1 × User manual
• 1 × Certificate