The FiiO ECHO NANO is one of the most exciting portable audio releases in recent memory — a retro-inspired, ultra-lightweight HiFi MP3 player that also doubles as a USB DAC. At just 33.5g and with a Cirrus Logic CS43131 DAC chip inside, it punches far above its weight class. In this review, we break down everything you need to know.
Who Is the FiiO ECHO NANO For?
The ECHO NANO is designed for music lovers who want a dedicated HiFi listening device that fits in any pocket, can be worn around the neck, and doesn't require a smartphone to play music. It's also a great entry point for anyone curious about USB DACs — plug it into your phone or laptop and instantly upgrade your audio output.
Design: Retro Charm Meets Modern Engineering
The ECHO NANO is part of FiiO's SNOWSKY sub-brand retro series, inspired by Sony's iconic "perfume bottle" MP3 players of the early 2000s. The body is crafted from 6-series aluminum-magnesium alloy via CNC machining, giving it a premium, wear-resistant finish. At 81 × 20 × 11mm and just 33.5g, it's genuinely pocketable — and light enough to wear on a lanyard all day.
The fingertip scroll wheel at the top is a standout feature: a single metal multi-function wheel handles volume, power, and screen wake/sleep — all with one hand, without looking. It's the kind of tactile detail that makes daily use a pleasure.
Sound Quality: CS43131 DAC Chip
At the heart of the ECHO NANO is the Cirrus Logic CS43131 — a dedicated HiFi DAC chip that supports native PCM 24-bit/192kHz and DSD256 decoding. The measured performance is impressive for a device this size:
- SNR: ≥127dB (A-weighted, 32Ω)
- THD+N: 0.0006%
- Noise Floor: 0.7μV
- Output Power: ≥120mW + 120mW (32Ω SE)
In listening, the ECHO NANO delivers a clean, detailed, and musical presentation. Bass is controlled and well-defined, mids are natural and transparent, and treble extends smoothly without harshness. For a device this small, the output power is surprisingly capable — it can drive most IEMs and many portable headphones with ease.
USB DAC Mode — Instant Upgrade for Your Phone or PC
One of the ECHO NANO's most practical features is its UAC (USB Audio Class) support, which lets it function as an external USB DAC for your smartphone, tablet, or PC. Simply connect via USB-C and your device instantly routes audio through the CS43131 chip — no drivers needed, plug-and-play. UAC mode also supports disabling charging to prevent battery drain on your connected device during long listening sessions.
Format Support & Storage
The ECHO NANO supports DSD, WAV, FLAC, APE, MP3, M4A, and OGG formats, covering virtually every audio file type you're likely to encounter. Storage is handled via a TF card slot supporting up to 256GB — enough for thousands of lossless tracks. The 0.91-inch OLED display shows track info clearly while consuming minimal power, contributing to the 7-hour battery life.
FiiO ECHO NANO vs FiiO ECHO MINI — What's the Difference?
The ECHO MINI is the larger sibling in FiiO's SNOWSKY retro lineup, offering a bigger display and more output power. The ECHO NANO is the more compact, lightweight option — ideal for on-the-go use, gym sessions, or wearing around the neck. If portability is your priority, the NANO is the one to get.
FiiO ECHO NANO vs Shanling M0 Pro
The Shanling M0 Pro is another popular ultra-compact DAP in this category. The ECHO NANO edges ahead with its retro aesthetic, lighter weight, and USB DAC functionality. The M0 Pro offers Bluetooth streaming, which the ECHO NANO lacks — so if wireless is important to you, factor that in.
Verdict
The FiiO ECHO NANO is a remarkable achievement in portable audio engineering. It delivers genuine HiFi performance in a form factor that's smaller and lighter than most USB sticks, with the added bonus of USB DAC functionality. Whether you're a seasoned audiophile looking for a travel companion or a newcomer wanting to explore lossless audio, the ECHO NANO is an outstanding choice.
Pros:
- Ultra-lightweight at 33.5g
- CS43131 DAC — genuine HiFi performance
- DSD256 and PCM 24-bit/192kHz native decoding
- USB DAC mode (UAC) — plug-and-play
- TF card up to 256GB
- Retro design with premium CNC aluminum body
- 7 color options
Cons:
- No Bluetooth streaming
- Small OLED display (0.91 inch)
- USB DAC limited to PCM 16-bit/48kHz
⭐ Rating: 4.5 / 5
