Overview

FiiO's Retro Nano is a Bluetooth DAC and headphone amplifier styled after vintage tape recorders, pairing a Qualcomm QCC5125 Bluetooth chip with dual CS43131 DAC chips. It supports AAC, SBC, aptX, aptX Low Latency, aptX Adaptive, aptX HD, and LDAC over Bluetooth 5.1, and drives a 3.5mm single-ended output with CTIA in-line control support alongside a 4.4mm balanced output rated at up to 220mW+220mW into 32Ω. The removable 3.7V lithium battery runs about 7.5 hours per charge and swaps out in seconds using the spare battery and storage case included in the box, and the Type-C port can also power the unit directly from a car stereo or powered speaker without touching the battery at all. A 0.96-inch colour IPS screen displays a retro-styled interface controlled through a double-press multi-function button that also handles calls and playback. It ships in Blue or White.

Simcoe Audio Video Insight

The detail that makes the Retro Nano worth a second look isn't the styling — it's that the battery is removable and swappable, with a spare included in the box, so a depleted charge during a long day is a ten-second swap rather than a wait by an outlet. The Type-C port doing double duty as a direct external power input is also easy to miss on a spec sheet: it means the Retro Nano can run directly off a car stereo's USB port or a powered speaker without ever touching the battery, which is a genuinely different use case from any other BTR-style amp in FiiO's lineup. Performance-wise it sits closest to the BTR13, with similar balanced output, just wrapped in a different shape and battery system.

Best for the FiiO Retro Nano: Keep the spare battery charged in the included storage case so a depleted unit is a quick swap rather than a wait, especially on longer trips away from a charger.

More Details

Why It Wins

• Removable, swappable battery: A spare is included, so running out of charge means a quick swap instead of stopping to recharge.
• Type-C as a direct power input: Can run directly from a car stereo or powered speaker's USB port, bypassing the battery entirely.
• 4.4mm balanced output alongside 3.5mm: Dual CS43131 DACs drive both, matching the balanced output level of FiiO's BTR13.

What Makes It Different

Most Bluetooth DAC/amps in this category share a similar black rectangular shape and a sealed, non-removable battery. The Retro Nano's vintage tape-recorder styling and swappable battery system set it apart visually and practically, without giving up the balanced output or codec support expected at this level.

Technical Highlights

• Dual CS43131 DACs: Drive both a 3.5mm single-ended and a 4.4mm balanced output, the latter rated up to 220mW+220mW into 32Ω.
• Qualcomm QCC5125 with LDAC and aptX Adaptive: The same high-resolution Bluetooth codec coverage found on FiiO's BTR13.
• 0.96-inch colour IPS screen: Displays a retro-styled interface, controlled through a double-press multi-function button.

Buyers Guide

Who This Is For

• The design-conscious listener: Someone who wants a Bluetooth DAC/amp that looks different from the usual black rectangle without giving up balanced output.
• The long-day, no-charger user: Anyone who wants a spare battery on hand rather than hunting for an outlet when the charge runs low.
• The car and speaker connector: Someone who wants to power the unit directly from a car stereo or powered speaker's USB port instead of relying on battery power.

Ideal Use Case

• All-day use away from an outlet: Swapping in the spare battery when the first one runs down.
• Direct power connections: Plugging directly into a car stereo's USB port or a powered speaker, no battery involved.
• Balanced 4.4mm listening: IEMs or headphones that support it, styled differently from a typical Bluetooth dongle.

What To Pair It With

• 4.4mm balanced IEMs or headphones: Where the Retro Nano's 220mW+220mW balanced output gets put to use.
• A car stereo or powered speaker with a USB port: Takes advantage of the Type-C port's direct power input capability.
• An LDAC or aptX Adaptive phone: For the full benefit of the Retro Nano's Bluetooth codec support.

Alternative Options

For similar balanced output in a more conventional shape with a sealed battery, the BTR13 covers much of the same ground. Anyone who wants considerably more power should look at the BTR15 or BTR17 instead, both of which push well beyond the Retro Nano's 220mW+220mW balanced output. The simpler, single-ended BTR11 is worth a look for anyone who doesn't need a balanced connection at all.