3.5mm to 2.5mm Aux Cable for Bose QC45 QC35II QC35 QC25 - 5FT

In this review of the Mr Rex 3.5mm to 2.5mm aux cable, the bottom line is simple: this is a practical replacement cable for users who need a direct wired connection for Bose, JBL or AKG headphones with a 2.5mm input. The reviewer found the 5 ft length and slim 2.5mm jack make it easy to use with travel or home listening, while the 24K gold-plate connectors and oxygen-free copper conductors deliver reliable, clear stereo sound. It is best for owners of compatible noise-cancelling headphones who want an inexpensive, durable spare or replacement cable.

Key Features

• 2.5mm slim jack compatibility: The thin 2.5mm connector is designed to fit Bose QuietComfort Ultra, 700, QC45, QC35II, QC35 and QC25 over-ear headphones without forcing the headphone hinge.
• Universal 3.5mm device end: The 3.5mm plug works with most phones, tablets, laptops and MP3 players that have a standard headphone jack for wired playback.
• High-fidelity conductors: Oxygen-free copper wiring supports clear stereo audio with reduced signal loss compared with lower-quality cables.
• Durable connectors: 24K gold-plated metal contacts and a dual-layer connector cover improve corrosion resistance and longevity for daily use.
• Strain-relief angle: The 135-degree angled section reduces bending stress at the plug for longer life under heavy use.
• Organized storage: A reusable cable tie is included to keep the 5 ft cable tidy in a headphone case or backpack.

Who It's For

This cable is aimed at owners of headphones that still use a 2.5mm input: primarily Bose QuietComfort models and a wide range of JBL and AKG on-ear and over-ear models. It suits commuters, frequent travelers and anyone who prefers a wired backup to Bluetooth for full compatibility with in-flight audio or devices without wireless pairing.

Users who should look elsewhere include owners of headphones from brands that do not use a 2.5mm jack (for example, many models from other manufacturers) and audiophiles seeking balanced or high-end studio cables; this is a consumer replacement cable optimized for convenience and compatibility rather than specialized pro audio uses.

Pros & Cons

Pros

• Compatible slim 2.5mm plug fits Bose QC series and many JBL/AKG models without excess play.
• Gold-plated connectors and oxygen-free copper help deliver clear stereo sound.
• 5 ft length gives good freedom of movement for portable and home use.
• Reusable cable tie and angled strain relief improve durability and storage.

Cons

• Not compatible with Sennheiser or Audio-Technica models that use different connectors, so check fit before buying.
• It is a single-ended consumer aux cable, so it does not provide a microphone or remote control for headsets that require those features.

Specifications

Length	5 ft (1.5 m)
Connector A	2.5mm slim jack (metal, angled design)
Connector B	3.5mm standard stereo plug
Conductor	Oxygen-free copper
Plating	24K gold-plated connectors
Included	Reusable cable tie

Our Verdict

The Mr Rex 3.5mm to 2.5mm aux cable is a sensible, low-cost replacement for owners of compatible Bose, JBL and AKG headphones who need reliable wired audio. It balances durability, compatibility and sound clarity for everyday use, making it good value for anyone who wants a dependable spare cable without unnecessary extras.

Frequently Asked Questions

Will this fit my Bose QC35II?
Yes, the slim 2.5mm connector is designed to fit Bose QC35II and other listed QuietComfort models.

Does this cable include a microphone or remote?
No, this is a stereo audio replacement cable only and does not include an inline microphone or remote control.

What devices work with the 3.5mm end?
The 3.5mm connector works with most smartphones, tablets, laptops, MP3 players and other devices that have a standard headphone jack.