FiiO M33 R2R High-Resolution Music Player with Sennheiser HD 660S2 Audiophile Headphone Bundle BLACK

This high-resolution personal audio bundle combines the FiiO M33 R2R portable music player with the Sennheiser HD 660S2 open-back audiophile headphones for dedicated wired listening at home or on the go.

The M33 R2R uses a fully differential 24-bit R2R resistor-array DAC, Qualcomm Snapdragon 680 processor, Android 13, 8GB of RAM and 128GB of internal storage. Its 3.5mm single-ended and 4.4mm balanced headphone outputs provide flexible connectivity, with balanced output rated at up to 1100mW + 1100mW into 32 ohms in Super High Gain mode.

The Sennheiser HD 660S2 uses a 38mm dynamic open-back transducer, 300-ohm impedance and a supplied 4.4mm balanced connection. Its extended 8Hz-41.5kHz frequency response, lightweight construction and velour earpads are designed for detailed, comfortable audiophile listening.

Bundle Includes

• 1 x FiiO M33 R2R Portable High Resolution Music Player BLACK - Model M33 R2R
• 1 x Sennheiser HD 660S2 Open-Back Audiophile Headphones BLACK - Model HD 660S2

Features

• FiiO M33 R2R with Qualcomm Snapdragon 680 processor and Android 13.
• Fully differential 24-bit R2R resistor-array DAC.
• XMOS XU316 USB controller for USB DAC performance.
• 8GB RAM and 128GB internal storage with microSD expansion up to 2TB.
• 3.5mm single-ended and 4.4mm balanced headphone outputs.
• Balanced output up to 1100mW + 1100mW into 32 ohms in Super High Gain mode.
• M27-derived DAPS Digital Audio Purification System.
• 10-band PEQ with AUTO EQ headphone matching.
• Bluetooth 5.0 with SBC, aptX, aptX HD, LDAC and LHDC transmission support.
• 5.5-inch 1080 x 2160 fully laminated display.
• Sennheiser HD 660S2 dynamic open-back headphone design.
• 38mm transducer with 300-ohm impedance.
• Frequency response of 8Hz-41.5kHz.
• 104dB SPL at 1kHz / 1Vrms.
• Ultra-light aluminum voice coil and vented magnet system.
• Velour earpads and lightweight ergonomic construction for extended listening.
• Supplied 4.4mm balanced plug and 6.3mm connection with 3.5mm adapter.

FiiO M33 R2R Specifications

• Model: M33 R2R
• Colour: Black
• Operating System: Android 13
• Processor: Qualcomm Snapdragon 680
• DAC: FiiO Proprietary Fully Differential 24-bit R2R
• USB Controller: XMOS XU316
• Display: 5.5-inch, 1080 x 2160 resolution
• RAM: 8GB
• Internal Storage: 128GB, approximately 112GB usable
• Storage Expansion: microSD up to 2TB
• Battery: 4400mAh
• Frequency Response: 20Hz-40kHz, attenuation less than 3dB
• SNR: ≥117dB A-weighted
• THD+N: PCM 0.0183% / DSD 0.0033%
• Crosstalk: ≥74dB at 1kHz / 32 ohms
• Balanced Output, Super High Gain: ≥1100mW + 1100mW at 32 ohms
• Balanced Output, High Gain: ≥900mW + 900mW at 32 ohms
• Single-Ended Output, Super High Gain: ≥470mW + 470mW at 32 ohms
• Single-Ended Output, High Gain: ≥300mW + 300mW at 32 ohms
• Local Playback: Up to 384kHz/32-bit, DSD256 Native
• USB DAC: Up to 768kHz/32-bit, DSD512 Native
• Coaxial Output: Up to 384kHz/24-bit, DSD128
• Headphone Outputs: 3.5mm single-ended, 4.4mm balanced
• Line Outputs: 3.5mm and 4.4mm
• Digital Outputs: USB Audio, SPDIF via coaxial
• Bluetooth Transmission: SBC, aptX, aptX HD, LDAC, LHDC
• Bluetooth Reception: SBC, LDAC
• Single-Ended Playback Time: Up to 15.5 hours
• Balanced Playback Time: Up to 13.5 hours
• Fast Charging: Approximately 1.5 hours to full charge
• Dimensions: 5.44 x 2.81 x 0.67 in / 138.2 x 71.5 x 17 mm
• Weight: Approximately 9.10 oz / 258 g

Sennheiser HD 660S2 Specifications

• Transducer Principle: Dynamic, open-back
• Transducer Size: 38 mm / 1.50 in
• Frequency Response: 8Hz-41,500Hz
• Impedance: 300 ohms
• Sound Pressure Level: 104dB at 1kHz / 1Vrms
• Total Harmonic Distortion: Less than 0.04% at 1kHz / 100dB
• Ear Coupling: Over-ear
• Weight: 9.17 oz / 260 g
• Connectors: 6.3mm jack plug and 4.4mm balanced plug
• Adapter: 6.3mm to 3.5mm
• Cable Length: 5.91 ft / 1.8 m
• Country of Origin: Ireland
• Magnetic Field: 4.5mT

What's in the Box

• 1 x FiiO M33 R2R Digital Audio Player BLACK
• 1 x FiiO Leather Case
• 1 x USB Data Cable
• 1 x FiiO Quick Start Guide
• 1 x FiiO Warranty Card
• 1 x GPL V2 Manual
• 1 x Pre-applied Screen Protector
• 1 x Sennheiser HD 660S2 Open-Back Audiophile Headphones BLACK
• 1 x Velour Carry Case
• 1 x 6.3mm to 3.5mm Adapter
• 1 x Sennheiser Quick Start Guide