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Monoprice 100646 3.5mm Male to Male Stereo Audio Cable - 25ft — main product image
Monoprice 100646 3.5mm Male to Male Stereo Audio Cable - 25ft
Monoprice 100646 3.5mm Male to Male Stereo Audio Cable - 25ft
Monoprice 100646 3.5mm Male to Male Stereo Audio Cable - 25ft
Monoprice

Monoprice 100646 3.5mm Male to Male Stereo Audio Cable - 25ft

★★★★★4.6 (1664 reviews)

Twenty-five feet of reliable TRS connectivity closes the distance between your source and your system without sacrificing signal integrity.

$1.99*$4.98Save 60%
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*Price sourced from Amazon.com. Last updated:Jun 27, 2026.Price and availability are subject to change.

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Overview

The Monoprice 100646 is a 25-foot male-to-male 3.5mm TRS audio cable built to close the physical gap between a stereo audio source and a distant input — car auxiliary inputs, desktop speaker systems, home stereo receivers, and similar consumer audio endpoints. The TRS (Tip-Ring-Sleeve) connector geometry carries a full stereo unbalanced signal: both left and right channels in a single cable run. At 25 feet, this is a practical working length for room-spanning installations where a short patch cable falls short. The cable's unbalanced topology is appropriate for consumer line-level signal paths where the source and destination share a common ground reference.

The engineering emphasis here is on mechanical durability at the connection points. Molded strain relief boots reinforce the cable at both connector housings — addressing the single most common failure point in audio cables: the junction between rigid connector and flexible cable. Rigid molded housings add grip and alignment confidence at plug-in. For users who need a reliable, permanent-installation cable between a media source and a speaker or stereo input, the 100646 delivers a straightforward solution without the markup of branded alternatives. It is not a cable for professional balanced audio runs, but within its designed application — consumer stereo connectivity at distance — it performs without compromise.

Key Features

This cable features a male 3. 5mm stereo (TRS) plug on each end with molded connector housings and strain relief boots.

The cable is ideal for connecting a stereo audio output such as an mp3 player or phone to a stereo audio input such as the auxiliary input on a car stereo system.

The 3. 5mm (1/8) stereo TRS connector is more commonly known as the Headphone Jack on portable mp3 players and mobile phones.

Quality at a Fair Price: Monoprice's rugged design and rigid quality control standards deliver high quality products at fair prices.

Specifications

Connector Type
3.5mm TRS (Male to Male)
Signal Type
Stereo Unbalanced
Cable Length
25 Feet
Color
Black
Strain Relief
Molded boots at both ends
Connector Housings
Molded rigid housing

Pros & Cons

👍 Pros

  • 25-foot length provides enough reach to connect a source device to a receiver across a room without extension adapters
  • Molded strain relief boots at both connector ends protect the highest-stress point in the cable — the connector-to-cable junction — from repeated flex failure
  • 3.5mm TRS connectors carry full stereo signal, preserving left/right channel separation from source to output
  • Molded connector housings provide a rigid grip surface for clean plug-in and pull-out without stressing the cable
  • Monoprice's quality control standards deliver consistent conductor integrity at a price point that makes bulk purchasing practical

👎 Cons

  • Unbalanced design means it is susceptible to hum and interference pickup over long runs in electrically noisy environments — 25 feet approaches the practical limit for unbalanced consumer audio
  • No gold-plated contacts specified — in high-humidity or high-use environments, connector oxidation over time can introduce intermittent signal
  • Not suitable for balanced professional audio equipment — the TRS connector will be misread as a balanced connection by some gear, potentially causing phase or level issues
  • 25 feet of cable has real physical weight and bulk; routing it cleanly in a permanent installation requires cable management that adds to the setup cost

Frequently Asked Questions

TRS stands for Tip-Ring-Sleeve — a three-conductor 3.5mm connector that carries a full stereo signal (left channel on tip, right on ring, ground on sleeve). This cable transmits both channels simultaneously, unlike a TS (two-conductor) mono cable.
At line-level impedances typical of consumer audio sources, 25 feet of standard shielded cable introduces negligible resistance and capacitance. The practical result is a transparent connection — you will not hear frequency roll-off or added noise at this length in typical use.
No — this is an unbalanced cable. The 3.5mm TRS connector carries stereo unbalanced audio. It is not pin-compatible with balanced TRS applications (which use TRS for mono balanced signal). Use it between unbalanced consumer devices, not professional balanced inputs.
The molded strain relief boot reinforces the cable at the point where it enters the connector housing — the highest-stress point in any cable assembly. It prevents the internal conductors from breaking due to repeated bending at a sharp angle, which is the most common failure mode in audio cables.

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