Mercury Figure 8 Speaker Cable 2 x 79 Strand CCA - White/Black 100m Reel

The Mercury Economy Figure 8 speaker cable is a 2-core parallel cable with 79-strand copper-clad aluminium (CCA) conductors in each core, giving a combined cross-sectional area of 2.48mm² per core. The cable is rated for continuous currents up to 25A, making it suitable for high-power PA speakers, distributed audio zones, and home theatre subwoofer runs where long cable lengths are needed without excessive voltage drop.

Supplied on a 100m reel, the cable is designed for professional installers running multiple speaker circuits in commercial venues, function rooms, houses of worship, and residential whole-home audio systems. The figure 8 profile keeps the two cores joined but separable, allowing easy routing through trunking or along skirting without needing cable ties to keep the pair together. The white outer sheath includes a black polarity line along one conductor, simplifying phase-correct termination at both the amplifier and speaker ends.

CCA conductors offer a lighter weight and lower cost alternative to pure copper while retaining acceptable conductivity for speaker-level signals across distances up to 30-40m depending on the impedance and power handling of the connected speakers. The 79-strand construction within each core gives the cable flexibility for routing around corners and through restricted spaces without the stiffness of solid-core wire. The 4.5 x 9.0mm cross-section fits standard dual-entry speaker terminals and binding posts.

What's the difference between CCA and pure copper speaker cable?

Copper-clad aluminium has an aluminium core with a thin copper coating, making it lighter and cheaper than pure copper. CCA has slightly higher resistance than pure copper, so it's best suited to runs under 30-40m where the voltage drop remains acceptable for speaker-level signals. Pure copper offers better conductivity for longer runs or critical listening applications.

Can this cable be used outdoors?

The cable sheath is PVC, which is not UV-stabilised or weatherproof. It's designed for indoor use in dry locations. For outdoor speaker runs, look for cable with UV-resistant or direct-burial-rated sheathing.

How do I identify polarity?

One conductor has a black polarity line running along the white sheath. Connect this marked conductor to the positive terminal at both the amplifier and speaker ends to maintain correct phase across all speakers in the system.

What speaker impedance and power levels does this suit?

The 2.48mm² cross-section and 25A current rating suit 8-ohm and 4-ohm speakers at power levels up to 200-300W per channel over typical residential and small commercial distances. For very high-power systems or distributed audio with extremely long runs, use a larger gauge cable to reduce voltage drop.