Modular Headphone Cable with Swappable Plugs

What it is

A braided upgrade cable for in-ear monitors with a modular player end. Instead of one fixed plug, the cable comes with plug modules — 2.5 mm balanced, 3.5 mm single-ended and 4.4 mm balanced in the 3-in-1 kit, or 3.5 mm and 4.4 mm in the 2-in-1 kit. The user swaps the module to match the player, so one cable covers a phone dongle, a desktop amp and a portable player with a balanced output.

The cable uses an 8-strand braid with MMCX or 0.78 mm 2-Pin earphone connectors, an aluminum-alloy splitter, a chin slider and pre-formed ear hooks, and ships in a pouch or case with room for the spare modules.

Who it's for

Earphone brands that want a flagship accessory cable that works with every customer's player.
Hi-Fi retailers who want to stock one cable instead of three versions with fixed plugs.
Brands building a cable family, where the same modules can be sold separately later.

Build & specs (standard build)

Braid: 8 strands, oxygen-free copper (OFC), 26 AWG per strand, soft PVC insulation; two strands each for L+, L−, R+ and R−
Earphone end: MMCX or 0.78 mm 2-Pin (flush), with left and right marking; heat-shrink ear hooks
Module connection: 4-contact socket on the cable (L+, L−, R+, R−); modules push on and lock with a threaded collar
Plug modules: 2.5 mm 4-pole, 3.5 mm TRS, 4.4 mm 5-pole; aluminum-alloy housings; gold-plated brass contacts
Module wiring: 3.5 mm joins L− and R− to the sleeve; 4.4 mm leaves the sleeve (ground) unconnected; full pin map in the specifications table
Hardware: aluminum-alloy Y-splitter and chin slider
Length: 1.2 m (3.9 ft) ±2 cm, including the plug module
Packaging: pouch with slots for the plug modules

Plug-swap durability figures are only published when a test report is available.

Customization options

Your logo on the plug modules or splitter
Insulation color; lengths from 0.8 m to 3 m
Silver-plated copper or mixed braids on request, with the conductor confirmed in writing at order
Kit contents: choose which modules are included
Custom case, insert card and barcode labels; additional modules, such as 6.35 mm or 4-pin XLR, as a custom project with new tooling
Plug contacts are gold-plated as standard; nickel-plated contacts are available as a customization.

Ordering notes

Low MOQ. You can combine connector versions and kits in one order to reach the minimum, with a smaller minimum per design.
Samples of stock designs are available before you order.
Lead time depends on the customization and is confirmed in your quote; new tooling adds time.
Specified by Haisen (Hong Kong). Manufactured in Guangdong, China by our manufacturing partners.

Specifications

General

Model No.	HA-HPC-02
Supply Form	Finished cable
Signal Type	Headphone
Application	Portable audio, IEM monitoring
Length	1.2 m (4 ft)
Length Tolerance	±2 cm (including plug module)
Length Measurement	Tip to tip
Country of Origin	China (Guangdong)

Conductor & Construction

Conductor Material	Oxygen-Free Copper (OFC)
Insulation Material	PVC

Connectors

Connector A Housing Material	Aluminum alloy
Connector A Contact Plating	Gold
Connector A Contact Base Metal	Brass

Details

Interchangeable Plugs	Yes
Source Plug	Modular
Braid Count	8
Gauge per Leg	26 AWG
2-Pin Type	Flush
Pin Assignment	Module socket: 4 contacts, L+, L−, R+, R−. 3.5 mm module: Tip L+, Ring R+, Sleeve L− and R− joined; 4.4 mm module: Tip L+, Ring 1 L−, Ring 2 R+, Ring 3 R−, Sleeve (GND) not connected; 2.5 mm module: Tip L+, Ring 1 L−, Ring 2 R+, Sleeve R−
Ear Hook	Pre-formed heat-shrink
Y-Splitter Material	Aluminum alloy
Chin Slider	Yes
Inline Mic/Remote	No
Headphone Connector	MMCX, 0.78 mm 2-Pin

Packaging

Packaging Type	Pouch

Specifications shown are our standard build for this product. Most items can be customized, and your quote confirms the final specification for your order.

Last reviewed November 4, 2026

Customize this cable

Choose what you want to make your own — we confirm feasibility, MOQ and lead time in your quote.

Downloads

Datasheet
Hi-Fi & Headphone Cables: Spec Sheet
PDF · 161 KB · EN
Download

FAQ

How do the plug modules attach?

Each plug module pushes onto a 4-contact socket at the end of the cable and is secured with a threaded locking collar, so it does not pull out in use. The socket carries L+, L−, R+ and R−; the 3.5 mm module joins L− and R− to its sleeve.

Can buyers mix plug modules from other brands?

No. Modular plug systems are not standardized, so modules from different brands are generally not interchangeable. Only the modules supplied with this cable, or modules quoted for the same system, should be used.

Which plug should my customers use?

Use the 3.5 mm plug for phones, laptops and players with a standard headphone jack. Use the 4.4 mm or 2.5 mm plug only with players that have a matching balanced output.

Which plug modules come in the kit?

The 3-in-1 kit includes 2.5 mm 4-pole, 3.5 mm TRS, and 4.4 mm 5-pole plug modules, and the 2-in-1 kit includes 3.5 mm and 4.4 mm modules. The cable ships in a pouch with slots for the spare modules, and you can choose which modules go in your kit.

Which earphone connectors and lengths are available?

The earphone end uses MMCX or flush 0.78 mm 2-Pin connectors with left and right marking and heat-shrink ear hooks. The cable is 1.2 m (3.9 ft) ±2 cm including the plug module, and lengths from 0.8 m to 3 m are available as a customization.

Who buys this

For DTC & E-commerce Brands

For Hi-Fi Cable Builders

Guides

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