The FiiO LL-3.5A is a replacement headphone cable with an omnidirectional boom mic, two 3.5mm TS plugs for the earcups and a single 3.5mm TRRS plug, built from 392-core silver-plated oxygen-free copper with a 1.5m run plus a 0.6m PC splitter. It suits FiiO FT1 owners and others with dual-3.5mm headphones who want headset-style voice chat.
Who the FiiO LL-3.5A is for
FiiO FT1 owners: It replaces the FT1's cable and adds a boom mic, so the headphones work as a voice-chat headset.
Phones and laptops: The single 4-pole 3.5mm (TRRS) plug carries audio and mic together for devices with a combined headset jack.
Desktop PCs: The included 0.6m extension splits into separate 3.5mm headphone and mic plugs for PCs with two jacks, and adds length.
Clear team chat: The omnidirectional mic wears a foam windscreen that FiiO says blocks wind noise and popping.
Skip it if: your headphones use a single cable entry, 2.5mm or 4.4mm sockets, or locking connectors; the LL-3.5A needs dual 3.5mm TS sockets on the cups.
FiiO LL-3.5A key specs
Type: Replacement headphone cable with boom microphone
Headphone end: Two 3.5mm TS plugs (L/R)
Source end: 3.5mm 4-pole (TRRS) plug for audio and mic
PC extension: 0.6m; 3.5mm TRRS socket to separate 3.5mm headphone and mic plugs
Length: About 1.5m, plus the 0.6m extension
Conductor: High-purity silver-plated oxygen-free copper, 4 strands, 392 cores in total
Microphone: Omnidirectional, with foam windscreen
Compatibility: FiiO FT1 and certain other FiiO or third-party over-ear headphones with dual 3.5mm TS sockets
In the box: Headphone cable, PC extension cable
Color: Black
Genuine FiiO stock. Free shipping on every order, 45-day returns.
Yes. Every unit we sell is genuine and brand-new, shipped in its original packaging, and backed by our 1-year TonePier warranty and 45-day returns.
Where does my order ship from, and how long does it take?
Every order ships from our warehouse in China, with full tracking, and most orders ship within 3 business days. Shipping is free on every order; most US orders arrive within 7–15 business days and most orders to other countries within 7–20 business days — see our shipping policy for details.
What if it isn't for me?
You get 45 days to decide. Keep the packaging, keep it in like-new condition, and send it back for a refund. Ear tips unsealed for hygiene reasons are fine — we expect you to actually listen.
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