REL Acoustics 6 Meters Bassline Blue High-Level Subwoofer Cable - BASSLINE 6M

REL Acoustics BASSLINE 6M 6 Meters Bassline Blue High-Level Subwoofer Cable

The REL Acoustics BASSLINE 6M Bassline Blue high-level subwoofer connection cable combines 18-gauge solid-core copper conductors, a proprietary filter board and amplifier-side spade connectors. Hand assembled for music systems and home theaters, it carries the same amplifier speaker-terminal signal that feeds the main speakers, helping preserve their tone, timing and texture. Rather than emphasizing bass output alone, this purpose-built upgrade is designed to bring greater clarity, dynamic shading and more seamless integration to the whole presentation.

Key Features

Proprietary Filter Board

The filter board is designed to preserve the incoming signal while providing appropriate impedance matching. Its goal is better-defined bass that integrates naturally with the main speakers, making the connection part of a coherent musical presentation rather than simply a way to add more low-frequency output.

Geometry for a High-Level Input

A high-impedance, low-current subwoofer input has different demands from a passive speaker. Narrow-gauge geometry addresses this specific application instead of relying on oversized conventional speaker wire. The design favors simple geometry and careful execution to support timing, transients and musical flow.

Hand Assembly and Spade Terminations

Simple spade connectors at the amplifier end were selected through listening comparisons. Hand assembly brings those connectors together with deliberately chosen termination techniques, keeping the emphasis on careful construction rather than elaborate networks. This is the standard high-level configuration.¹

18-Gauge Solid-Core Copper

Slowly drawn, grain-aligned copper forms the foundation of the conductors. Solid-core construction, selected twists and silver solder are part of an approach focused on transparency and durable materials. The unobtrusive proportions reflect a cable designed specifically for this signal connection, not for delivering current to passive speakers.

Sound Illuminated

The intended upgrade extends beyond bass: clearer vocals, improved instrument separation and greater openness across the soundstage. With complex ensembles, the design aims to reveal individual musical lines with less congestion, bringing out nuance without adding brightness. Existing systems, including older REL Acoustics installations, are among the intended upgrade candidates.

After replacing the original cable, REL Acoustics suggests trying the crossover 1-2 clicks higher and the gain 1 click higher, with a maximum gain increase of 2 clicks.

Features

• Proprietary Filter Board
  Helps maintain signal integrity for more articulate bass.
• Narrow-Gauge Geometry
  Designed around the low-current demands of a REL Acoustics high-level input.
• Hand-Assembled Construction
  Uses carefully selected twists and termination techniques.
• Amplifier-Side Spade Connectors
  Connects at the amplifier's speaker outputs.
• 18-Gauge Solid-Core Copper
  Uses slowly drawn, grain-aligned copper conductors.
• Silver Solder
  Used in the cable's soldered connections.
• High-Level Signal Path
  Helps the subwoofer follow the main speakers' tonal character.
• Sound Illuminated
  Targets clearer voices and more distinct instruments without added brightness.

Footnotes:

¹ NAIM options use dedicated circuitry and stackable banana plugs; these are not the standard configuration's hardware. For Audio Research, D'Agostino and CH Precision amplifiers, REL Acoustics recommends a separate Special Edition.