The FiiO RETRO BOX is shipping. The cassette shaped desktop speaker sells in black and white through FiiO’s official AliExpress store for US $56.47, and the shape is doing the heavy lifting here, because a rectangular box with two knobs would never have gotten a second glance. Docking hardware is a strange thing to get excited about. This one earns the look.
Price: $56.47
Where to Buy: AliExpress
Fit matters here. Compatibility runs four players deep: JM21, M21, the M33 series, and the upcoming M25. Drop one into the front bay, pair it over Bluetooth, and the player’s own screen becomes the face of a working speaker, which is the whole pitch. Everyone else gets a 5W per channel Bluetooth box with a USB DAC mode.
What FiiO actually built
Two full range 40mm drivers and two passive radiators sit in separate chambers, and FiiO’s stated reason for the split is crosstalk rather than raw volume. Each driver is a 4 ohm unit. Frequency response runs 65Hz to 20kHz, so sub bass was never part of the plan. Small box, small physics.
Continuous power is where FiiO plants its flag: 5W a side, with a 10W ceiling quoted for the amplifier. A per channel figure of 5.3W circulates in spec listings, and it may well sit on FiiO’s product page, but the launch post doesn’t carry it. 
Two 18500 lithium cells sit inside, wired in parallel, which FiiO says minimizes internal resistance and gives the dual-channel amp more power to work with. The 683g of the FiiO RETRO BOX shell feels dense. In the box: speaker, USB cable, a mounting insert for the M21 and JM21, and the usual paperwork. No power brick.
The cassette window shows the docked player’s screen
Open the front cover, slide a JM21, M21, or M33 into the bay, and connect over Bluetooth. The screen in every product shot belongs to the player, so the box supplies a window cut in the shape of a cassette shell and the docked DAP supplies the picture behind it. Completely cosmetic. Also the only reason to buy this over a cheaper speaker with better numbers.
Buying a speaker for its viewing window sounds indefensible until you remember why anyone bought the M33, a player built around an R2R ladder DAC because the crowd it serves pays for feel ahead of measurement. That crowd already owns better sounding hardware. This is a stage for it. We’ve argued that the retro gadgets worth owning are the ones doing a job rather than holding a pose.
Battery life, and the footnote FiiO buried
Rated runtime is about 10.5 hours, though FiiO’s launch post doesn’t say which codec that figure assumes, and spec listings attach it to SBC, which would put LDAC on the shorter path. Treat 10.5 as the best case. Charging takes 2.5 hours from a DC 5V 2A supply.
USB DAC mode turns the box into a desktop output for a laptop, driverless, with UAC 1.0 support at 44.1k, 48k, and 96k sampling rates. No driver install. FiiO buries a warning under it: the port carries data and power at once, so connect a phone or tablet and the speaker starts eating the source device’s battery while you listen. FiiO was right to flag it.
Turn it all the way up and it may still sound polite. That restraint is deliberate, and FiiO’s reasoning is headroom rather than cost, since an amp held back from clipping stays clean through the peaks that would otherwise break it. A gain control is coming in a future firmware update. Buy on the promise, or wait.
What’s absent maps the audience precisely: no aux input, no IP rating, and Bluetooth reception only, so the box can’t send audio anywhere and a turntable or CD player needs a different speaker entirely. Wired sources are out. Sound presets split into HiFi and Retro in the app, though FiiO doesn’t publish what either does to the curve.
The price gap between FiiO and its own dealers
FiiO’s official AliExpress store has it at US $56.47, confirmed live on 2026-08-03. HiFiGO, an authorized dealer, lists the same speaker at $79.99, so buying through a domestic shop instead of direct from FiiO costs an extra $23.52, which is roughly a 42 percent markup on a $56 accessory. Same box either way. Coupons and currency move the AliExpress figure around, so read it as a snapshot, not a locked price.
That settles the question this section was built around. A two driver, two radiator enclosure with LDAC and a driverless USB DAC at $56 is a fair trade for what it does, and the same hardware at $80 turns into a docking tax for a window. Buy direct and you’re paying accessory money. Buy local and you’re paying the tax.
Should you buy it
Own a JM21, M21, or M33? At $56 direct, that’s an easy call. FiiO ships a mounting insert for the JM21 and M21 and a silicone pad for the larger M33, so the player seats properly instead of rattling around an oversized cavity, and that tailored fit is what you’re paying for. Docking beats a shelf.
Everyone else should skip it. $56 is not much money, but a 5W per channel box with no aux input and a deliberately capped gain still loses to plenty of cheaper options the moment you strip the docking trick out, and our guide to the Bluetooth speakers worth buying in 2026 covers those alternatives with the tradeoffs spelled out.
Price: $56.47
Where to Buy: AliExpress
Watch availability, not price. FiiO says overseas shipments roll out progressively and points regional buyers at authorized local agents, which reads as a staged first run rather than a global launch. Stock is the risk here. You may also check out other devices from the brand: FiiO Echo 4G Hi-Res Digital Audio Player, FiiO DM13 Multifunctional Portable Stereo CD Player, and the FIIO DISC Portable HiFi Music Player.
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(as of August 2, 2026 09:35 GMT -05:00 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
