Overview

The FiiO FT5 is an open-back, wired headphone built around a 90mm planar magnetic driver, using a PAR diaphragm and aluminum alloy voice coils. It's tuned for a notably high 110dB/Vrms sensitivity for a planar driver of its size, so it runs easier from a phone or laptop than most planar headphones this large, while a 2000mW maximum power input still leaves room to grow with a dedicated amplifier. A magnesium aluminum alloy shell and headband keep weight to about 456g despite the driver size, and FiiO includes both suede and protein leather earpads, plus a single cable with a swappable 3.5mm/4.4mm plug rather than two separate cables. The result is a planar headphone built as a middle ground between fully portable convenience and full desktop performance.

Simcoe Audio Video Insight

Most planar magnetic headphones need serious desktop amplification to sound their best, but FiiO specifically tuned the FT5's 90mm driver for a higher sensitivity rating, so it plays noticeably louder and cleaner from a portable source than a typical planar design its size — worth knowing if you don't want to commit to a full amp stack right away. The single cable with a swappable 3.5mm/4.4mm plug is a different approach than the FT1 Pro's two separate cables: it means less to carry, but also no simultaneous single-ended and balanced option, so pick whichever plug matches your source before heading out. At 456g, the FT5 is heavier than the FT1 Pro, so the 4.0N±0.3N earpad pressure and the suede or protein leather pad choice both matter more for comfort over long sessions.

Best for the FiiO FT5: Start with the swappable plug set to 3.5mm for portable sources, and switch to 4.4mm balanced once you add an amp capable of using its 2000mW power handling.

More Details

Why It Wins

• 90mm planar magnetic driver: a PAR diaphragm and aluminum alloy voice coils tuned for a 7Hz-40kHz frequency response.
• High 110dB/Vrms sensitivity: unusually easy to drive for a planar headphone of this driver size, while a 2000mW max power input still leaves room for a dedicated amp.
• Two earpad types included: suede and protein leather, both included for adjusting fit and tonal balance.

What Makes It Different

Most planar magnetic headphones this size are built strictly for desktop amplification and struggle from a portable source. The FT5's higher sensitivity rating makes it noticeably easier to drive than a typical planar headphone in its class, positioning it as a bridge between portable convenience and the full desktop performance that headphones like the FT7 are built around.

Technical Highlights

• 36Ω impedance with 96dB/mW and 110dB/Vrms sensitivity: a combination that keeps the FT5 usable from a range of sources.
• 2000mW maximum power input: real headroom for anyone who adds a dedicated headphone amplifier later.
• 456g weight with 4.0N±0.3N earpad pressure: a magnesium aluminum alloy build that keeps the clamping force tuned for long sessions despite the driver size.

Buyers Guide

Who This Is For

• The Semi-Portable Planar Listener: anyone who wants planar magnetic sound without being tied to a large desktop amp, thanks to the FT5's higher sensitivity rating for its driver size.
• The Two-Pad Tuner: anyone who wants to switch between suede and protein leather pads to adjust comfort and tonal balance rather than committing to one.
• The Amp-Ready Listener: anyone who already owns, or plans to buy, a dedicated amp with real power headroom and wants a planar headphone built to use it.

Ideal Use Case

• Desk listening with a moderate amp: enough power to make use of the FT5's 2000mW handling without needing an elaborate desktop stack.
• Listening from higher-output portable sources: the FT5's sensitivity keeps it usable away from a desk more than most planar headphones its size.
• Home listening sessions: where the open-back design's soundstage matters more than isolation from outside noise.

What To Pair It With

• FiiO K9 Pro ESS desktop amp: enough power to make full use of the FT5's 2000mW handling.
• FiiO KA17 dongle DAC: a more portable amped option for using the FT5 away from a desk.
• FiiO Q7: a higher-output portable and desktop amp for a source with enough headroom on the go.

Alternative Options

The FT1 Pro uses a smaller 95x86mm planar driver in a lighter, less power-hungry package, better suited to staying portable. The FT7 moves further up FiiO's planar lineup with a gold-and-silver diaphragm and carbon fiber build for listeners who want to go further, while the FT13 offers a closed-back dynamic alternative for shared spaces where an open-back design isn't practical.