FiiO M33 black
FiiO M33 black
The R2R player from FiiO. FiiO M33 is a portable player built on a converter with R2R architecture. It's built on precise voltage steps and natural timing, which is often associated with a more 'analogue' musical delivery. It also includes selectable OS/NOS modes – choose between oversampling for higher accuracy or non-oversampling for a more direct signal path. With a balanced output of up to 1100mW + 1100mW at 32Ω and several amplification modes (Low / Medium / High / Headphone Amp), the FiiO M33 can effortlessly drive both sensitive IEMs and demanding full-size headphones.
Key features of the FiiO M33 MP4 player, black
- Portable R2R MP4 player
- Fully differential complementary 24-bit R2R resistor array
- Qualcomm Snapdragon 680 processor
- Android 13 operating system
- XMOS XU316 USB chip
- Selectable OS/NOS modes
- Fully laminated touchscreen with 1080×2160 resolution
- 30W fast charging (full charge time approx. 1.5h)
- Battery life of 15.5h (unbalanced output) and 13.5h (balanced output)
- Also suitable as a compact desktop DAC and preamplifier
- Bluetooth version 5.0
- Black colour finish
Android platform, large display and flagship amplifier
At the heart of the FiiO M33 is a Snapdragon 680 processor running on Android 13, making it ideal for both playing from a local library and using modern streaming apps. The 5.5" touchscreen with a resolution of 1080×2160 px is clear and pleasant to use. Power is handled by a multi-stage, 'full Ti-based' headphone amplifier, which remains perfectly stable across various gain settings and maintains a low noise floor even under high loads – making it suitable for both sensitive IEMs and larger headphones.
Precise analogue construction
The analogue section of the FiiO M33 R2R Portable Music Player uses a pair of fully differential OPA1637 I/V op-amps, an OPA1662 LPF stage, four INA1620 headphone amplifiers, and a precise NJW1195A volume control chip. Eight Rubycon film capacitors, independent power supplies, and multi-layer isolated shielding significantly reduce crosstalk and noise.
Desktop mode, Bluetooth, separate USB power and long battery life
The FiiO M33 offers a desktop mode with dual USB inputs that separate charging from playback to reduce interference during extended listening sessions. This means you can also use it as a compact desktop DAC and preamplifier without unnecessarily draining the battery. The FiiO M33 supports Bluetooth 5.0 with SBC, aptX, aptX HD, LHDC, and LDAC codecs for transmitting, and SBC / LDAC for receiving. The built-in 4400mAh battery provides up to 15.5 hours of playback, and the fast 25W 'low-temperature' charging focuses on both speed and temperature control.
Hi-Res playback with an advanced XMOS USB DAC solution
For USB audio, the FiiO M33 Portable Music Player uses a separate XMOS XU316 USB chip that supports USB DAC mode up to 768kHz / 32-bit and DSD512 (Native). Local playback supports up to 384kHz / 32-bit and DSD256 (Native), ensuring high-resolution audio decoding. The coaxial output supports up to 384kHz / 24-bit and DSD128 (DoP/D2P).
Technical specification
RAM: 8GB
Storage Expansion: Supports TF card up to 2TB
Bluetooth Transmit/Receive: SBC, aptX, aptX HD, LHDC, LDAC / SBC, LDAC
Local Playback: 384kHz / 32-bit, DSD256 (Native)
USB DAC: 768kHz / 32-bit, DSD512 (Native)
Coaxial Output: 384kHz / 24-bit, DSD128 (DoP / D2P)
Balanced Output (32Ω): 1100mW + 1100mW
Unbalanced Output (32Ω): 470mW + 470mW
Frequency Response: 20Hz–40kHz (<3dB)
Signal-to-Noise Ratio (SNR): ≥117dB (A-weighted)
Noise Floor: <5.5µV (A-weighted)
Total Harmonic Distortion + Noise (THD+N): PCM 0.0183% / DSD 0.0033%
Channel Separation: ≥74dB (1kHz @ 32Ω)
Specifications
Memory
Connection
Supported formats
Features and functions
Display
Battery
Dimensions and weight
Package contents
Colour
| Code: | MCaaa0737 |
| Warranty: | 24 months |
| Links: | Producer's Website: |
| Manufacturer information |
S.I.C. spol s r.o., Na Folimance 2155/15 120 00 Praha 2, [email protected], +420 222 505 045 
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