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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-04 · 7 min read · Independent comparison
• Cubilux Headphone Splitter — biggest strength: two 3.5mm outputs from one jack, each with its own numbered volume wheel, plus a combo TRRS jack that supports microphone input. For people hunting headphones for a big head, this is the accessory that makes shared listening practical.
• Cubilux Headphone Splitter — biggest trade-off: it's a passive analog splitter. No amplifier, no charging, and the dials only attenuate — they lower volume from your device's maximum rather than boosting it.
• phoie USB-C — biggest strength: a 2-in-1 USB-C dongle that handles 3.5mm audio and 60W fast charging at the same time, with 384kHz Hi-Res audio support and a broad device compatibility list.
• phoie USB-C — biggest trade-off: it solves a USB-C problem, not a "two listeners" problem. There's one 3.5mm output and no independent volume control.
• Who each pick is for: Cubilux if you're sharing audio with a second person on a trip; phoie if your phone dropped the headphone jack and you still want to charge while you listen.
The Cubilux splitter is a small, purpose-built cable. One plug goes into your device's 3.5mm jack, and two jacks come out the other end — one for you, one for whoever is sitting next to you. That's the whole idea, and it's a good one on a long flight or a train ride where two people want the same movie at the same time without bothering anyone around them.
What makes it more interesting than a plain Y-cable is the volume arrangement. Each output has its own numbered wheel, so you can nudge your side down while your companion keeps theirs up — or the reverse. Worth being precise about what those wheels do, because it's a common misunderstanding: they control the headphones' volume only, they don't amplify anything, and they don't change your device's own output level or the microphone level. If you want to raise the ceiling rather than lower it, the splitter can't help; it works inside whatever your device already outputs.
The other detail that separates it from a generic splitter is the combo jack. It supports a 4-pole TRRS connection, which means a headset with an inline mic can plug in alongside a regular pair of headphones. That's handy for calls, voice recording, or anything where one person needs to talk and the other just needs to listen. Build-wise, the spec sheet describes an aluminum alloy case and a nylon braided cable, and the whole thing measures roughly 2.56 by 2.4 by 0.59 inches — small enough to live in a bag pocket and shrug off being shoved in and out of one.
Buy it if you regularly share audio with one other person, you want per-person volume trim, or you need a mic-capable jack in the mix. Skip it if you're trying to solve a missing headphone port on a modern phone — this is a 3.5mm-to-3.5mm accessory and does nothing for a USB-C-only device.
One more thing worth naming, since it comes up a lot in this category: the Cubilux is the kind of accessory people reach for when they're searching out the best neckband headphones for a big head or any over-ear pair that actually fits a larger skull. Those headphones tend to be the ones people keep for years and want to share — and this splitter is how you share them without handing your phone back and forth.
The phoie dongle answers a completely different question. Modern phones and tablets increasingly ship without a 3.5mm jack, and the usual adapter forces a choice: listen or charge, not both. This one is a 2-in-1 — a USB-C to 3.5mm headphone adapter and a 60W fast-charging pass-through in the same small body.
The audio side is more ambitious than most budget dongles. The spec sheet lists 384kHz Hi-Res audio support, which puts it in a different conversation from a basic passive adapter. The connector set covers both Auxiliary and USB Type C, and the compatibility list is genuinely wide: iPhone 17/16/15 families including Plus, Pro Max and SE, the iPad line, Samsung's Galaxy S26 down through S20 including Plus, Ultra, FE, Z Fold and Z Flip models, the W and Note 20 lines, and Google Pixel 9 through 6 including Pro and XL. If you're on any of those, you're covered.
Physically it's tiny — about 4.3 by 0.8 by 0.3 inches and roughly 7 grams — finished in white ABS plastic. There are two ports: the 3.5mm jack and the USB-C charging input. phoie backs it with a 3-year limited warranty, which is a longer commitment than most accessories in this space bother to make.
Side-by-Side: Which Should You Choose?
• Best for sharing audio with a second person → Cubilux Headphone Splitter. Two outputs, two volume wheels, no app or setup required.
• Best for a phone with no headphone jack → phoie USB-C. It restores the 3.5mm jack your device dropped.
• Best for charging while you listen → phoie USB-C. 60W pass-through charging is something the Cubilux simply doesn't attempt.
• Best for per-person volume control → Cubilux Headphone Splitter. Independent numbered dials on each output; the phoie has none.
• Best for microphone use → Cubilux Headphone Splitter. The combo TRRS jack supports a headset mic, which the phoie's single audio output doesn't address.
• Best for high-resolution audio output → phoie USB-C. 384kHz Hi-Res support is the standout number on that sheet.
• Best for travel with a companion → Cubilux Headphone Splitter. Its stated use case is planes, trains and buses, and the aluminum and braided-nylon build suits constant packing.
• Best for a bigger, longer-term accessory commitment → phoie USB-C, on the strength of its 3-year limited warranty.
If I had to pick one, I'd buy the Cubilux Headphone Splitter — but only because of the job I'm imagining. If you're traveling with someone and you both want the same audio, the dual outputs and independent volume wheels do something no single-output dongle can, and it's the accessory I'd reach for whether the headphones in question are neckband models or full over-ear headphones for a big head. The phoie is the smarter buy if your actual problem is a missing port and a battery that needs topping up mid-flight. Check the current price on Amazon before you commit to either.
No. It's a 3.5mm to dual 3.5mm accessory, so it needs a physical headphone jack at the source. If your phone is USB-C only, you'd need an adapter first — or the phoie dongle instead.
Yes, that's its core feature. It's a 2-in-1 dongle combining a 3.5mm headphone output with 60W fast charging, so you don't have to unplug your headphones to top up the battery.
No. The dials only adjust the headphones' volume within your device's existing output range — they can lower it from maximum but can't exceed it. They also don't control the microphone level or your device's own volume.
The Cubilux, without question. Two outputs, each with its own volume wheel. The phoie has a single 3.5mm output, so a second listener would need a splitter plugged into it anyway.
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