We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-04 · 8 min read · Independent comparison
If you want a Beats-style replacement cord with an inline mic and remote for calls and track control, choose EARLA TEC Replacement Audio Cable; if you need a long 2.5mm-to-3.5mm cord to run Bose, JBL or AKG headphones from a desk amp or laptop, choose Mr Rex 2.5mm.
• EARLA TEC Replacement Audio Cable — biggest strength: a three-button inline remote and microphone built into a soft, tangle-free TPU cord, with two different plug shapes (one straight, one L-shaped) so it fits both headphone cups and phone cases.
• EARLA TEC Replacement Audio Cable — biggest trade-off: the remote and mic only work with Apple iPods, iPads and iPhones — the buttons do nothing on Samsung or other non-Apple devices.
• Mr Rex 2.5mm — biggest strength: a full 10 feet (3 metres) of cable with oxygen-free copper and gold-plated connectors, long enough to stand up, stretch or step away from a desk amp.
• Mr Rex 2.5mm — biggest trade-off: it is the wrong plug for standard 3.5mm headphone sockets — it only fits headphones that use a 2.5mm jack port, and it carries no inline mic or remote at all.
• Choose EARLA TEC Replacement Audio Cable if you own Beats by Dr. Dre headphones and want phone calls and music control from the cord.
• Choose Mr Rex 2.5mm if you own Bose, JBL or AKG headphones with a 2.5mm port and want a long, tidy wired run to a computer, amp or TV.
The EARLA TEC Replacement Audio Cable is a direct swap for a lost or worn-out cord on Beats by Dr. Dre headphones. The listing names Solo, Studio, Pro, Detox, Mixr, Executive and Pill, and the description backs that up with the Studio 2, Studio, Solo 2, Mixr and Pro. You get a 1.4m cable with two male 3.5mm plugs — one straight, one L-shaped — which is the classic setup for a headphone that wants a right-angle plug at the cup and a straight plug at the phone.
What makes it interesting is the inline module. There's a microphone and a control unit on the cord, so you can answer and hang up calls, nudge volume up or down, skip tracks and trigger Siri or voice command. For anyone who takes calls while wearing their Beats, that turns a plain replacement cord into a genuinely useful one. The TPU coating is described as soft, tangle-free and durable, and the dark blue finish is a small style detail if you like a bit of colour on your cable.
Here's the catch, and it's a big one. The remote only works on Apple iPods, iPads and iPhones — not on Samsung or any non-Apple device. So if you're an Android user, you'd be buying a cord where the buttons and mic sit there doing nothing. The cable still passes audio, but you lose the whole point of the inline unit.
Mr Rex 2.5mm: Who It's For
Mr Rex 2.5mm is a different animal entirely. This is a 2.5mm-to-3.5mm aux cable, 10 feet (3 metres) long, built for headphones that take a 2.5mm plug at the cup and connect to a standard 3.5mm socket at the other end. The compatibility list is specific and worth reading closely: Bose 700, QuietComfort QC45, QC35, QC35II and QC25; JBL models including E45BT, E55BT, E65BTNC and 750NC; and AKG sets like the Y55, Y50 and Y45 BT. The description also warns plainly that it does not fit Sennheiser or Audio-Technica headphones, which is the kind of honesty I appreciate in a spec sheet.
The headline feature is the length. Ten feet is a lot of cable. If you plug into a desktop amp, a laptop or a PC, you can stand up, stretch, bend down or walk a few steps without yanking your headphones off. That's a real quality-of-life difference over a short 1.4m cord, and it's the main reason someone would pick this over a stock cable.
Build-wise, Mr Rex uses oxygen-free copper and 24K gold-plated connectors, with a 135-degree angled plug designed to reduce strain and tearing, plus a metal connector and dual-layer cover for daily heavy use. You also get a reusable Velcro cable tie, which matters when you're managing three metres of cord on a desk or in a bag. The cable is black TPE, round in shape, 5 pins, 2.5mm male to 3.5mm male.
Two things to know before you buy. First, there is no microphone and no remote — this is a straight audio cable, so calls and track skipping have to happen on your device. Second, the 2.5mm end only fits headphones with a 2.5mm port; plugging it into a standard 3.5mm headphone jack won't work. If your phone or laptop has no 3.5mm socket, you'll need a Lightning or Type-C to 3.5mm adapter, which the listing notes but does not include.
Buy it if you own Bose, JBL or AKG headphones with a 2.5mm port and want a long, well-made cable for desk, couch or studio use. Skip it if you need an inline mic, or if your headphones take a 3.5mm plug.
• Best for phone calls and voice commands → EARLA TEC Replacement Audio Cable. It has the built-in mic and inline controls; Mr Rex has none.
• Best for long cable runs → Mr Rex 2.5mm. Ten feet versus 1.4m is not a small gap — it changes how you can move while listening.
• Best for Beats by Dr. Dre headphones → EARLA TEC Replacement Audio Cable. Solo, Studio, Pro, Mixr, Executive and Pill are all named as compatible.
• Best for Bose, JBL and AKG headphones with a 2.5mm port → Mr Rex 2.5mm. That's exactly the socket it's built for.
• Best for iPhone, iPad and iPod users → EARLA TEC Replacement Audio Cable, because that's the only place its remote actually functions.
• Best for Android users → Mr Rex 2.5mm. No wasted buttons, and it works as a plain audio cable on any 3.5mm socket.
• Best for desk, laptop or PC listening → Mr Rex 2.5mm, thanks to the length, the angled plug and the included Velcro tie.
• Best for tangle-free travel → EARLA TEC Replacement Audio Cable, whose TPU coating is described as soft and tangle-free, and whose 1.4m length is far easier to pocket.
One more practical point that trips people up: these two cables solve opposite problems. EARLA TEC replaces the cord on a headphone that uses a 3.5mm jack at the cup and adds control. Mr Rex adapts a headphone that uses a 2.5mm jack at the cup down to a normal 3.5mm source and adds length. If you're unsure which socket your headphones have, look at the plug on your current cable — a slim 2.5mm tip means Mr Rex, a standard 3.5mm tip means EARLA TEC.
Also worth noting: neither cable is a Bluetooth solution. If your headphones are wireless Bluetooth models like the Bose 700 or JBL E55BT, these cords turn them into wired headphones — which is often the whole point for latency-free listening, dead-battery situations, or plugging into a device with no wireless support. That's a genuinely useful trick, and it's the reason people search for replacement aux wires in the first place.
In my opinion, the right pick comes down entirely to your headphone socket and whether you need a mic. If you own Beats by Dr. Dre headphones and use an Apple device, I'd buy the EARLA TEC Replacement Audio Cable — the inline mic and controls are the reason to choose it, and the two plug shapes make it easy to live with. If you own Bose, JBL or AKG headphones with a 2.5mm port, I'd buy Mr Rex 2.5mm — the 10-foot length, the angled gold-plated connectors and the Velcro tie make it the more capable desk cable. Android users should lean Mr Rex either way, since EARLA TEC's controls simply won't respond.
how to make aux cable with headphones
You're not really "making" a cable — you're replacing the detachable one your headphones already use. Check the plug on your existing cord: a 3.5mm tip points to the EARLA TEC Replacement Audio Cable, while a slim 2.5mm tip points to Mr Rex 2.5mm. Both are male-to-male aux cables, so one end goes into the headphone cup and the other into your phone, laptop or amp.
how to use wired headphones without headphone jack
You need an adapter. Mr Rex 2.5mm ends in a standard 3.5mm male plug, so if your phone only has Lightning or USB-C, you'll need a Lightning or Type-C to 3.5mm female adapter to bridge the gap. The same applies to the EARLA TEC cable — its 3.5mm plug needs a 3.5mm socket, or an adapter if your device has none.
how do i connect my wired headphones to my phone
Plug the 3.5mm end of the cable into your phone's headphone socket and the other end into the headphone cup. With the EARLA TEC Replacement Audio Cable on an iPhone, iPad or iPod, the inline remote and mic then work for calls and playback. On Android, the EARLA TEC buttons won't respond, so Mr Rex 2.5mm is the cleaner choice if you just want audio.
do i need a mic on my replacement headphone cable
Only if you take calls or use voice commands while wearing your headphones. The EARLA TEC Replacement Audio Cable includes an inline microphone and control unit; Mr Rex 2.5mm has neither, so it's purely for listening. If calls matter and you're on an Apple device, EARLA TEC is the one to pick.
As an Amazon Associate I earn from qualifying purchases.
We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon and affiliated sites.
When you buy through links on this page, we may earn a commission from qualifying purchases at no extra cost to you.
Amazon and the Amazon logo are trademarks of Amazon or its affiliates. This site is an independent third-party review and is not affiliated with, endorsed by, or sponsored by Amazon or the product brands mentioned.
See also: HiDock P1 vs JustJamz Chrome 50, MAS CARNEY USB C Earbuds vs wamaxlink 2-in-1: USB Wired, Necode Trucker vs Strikonx G7, NUBWO HW02 vs Vakedy Gaming Headset