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

The Mercury Economy Figure 8 is a 100m reel of 2-core speaker cable built around copper clad aluminium (CCA) conductors, with each core containing 79 strands of 0.2mm wire giving a combined cross-sectional area of 2.48mm² per conductor. The cable carries a 25A maximum current rating, making it suitable for PA systems, live sound installations and powered home audio setups where longer cable runs are needed between amplifiers and passive speakers.

Designed for installers working on multi-room audio, distributed PA systems in commercial venues, or large outdoor events, the 100m reel length allows continuous runs without mid-cable joins. The figure 8 profile keeps the two conductors parallel and separable, so you can split them apart at termination points without cutting through additional insulation. The black PVC sheath includes a white polarity line running the length of one conductor, giving a visual reference to maintain phase consistency across multiple speaker connections.

CCA construction offers a cost-effective alternative to pure copper for installations where budget constraints apply and cable runs are kept under typical PA lengths (under 30m per run for 8-ohm loads). The 4.0 x 8.0mm cross-section keeps the cable flexible enough to route through conduit, around corners and behind skirting without excessive stiffness. Each reel is supplied as a single continuous length, ready for cutting to the exact distances required on site.

What is CCA and how does it differ from pure copper cable?

CCA (Copper Clad Aluminium) uses an aluminium core with a thin copper coating. It has higher resistance than pure copper, so it's best suited to shorter cable runs (typically under 30m for 8-ohm loads) where the resistance increase doesn't cause audible signal loss. Pure copper offers lower resistance and is preferred for longer runs or critical applications, but CCA provides a cost-effective option for budget-conscious installations.

What does the 25A current rating mean in practice?

The 25A rating indicates the maximum continuous current the cable can carry safely without overheating. In audio terms, this supports amplifiers delivering several hundred watts into typical 4-8 ohm speaker loads. Most domestic and small PA systems operate well below this threshold.

What is the white polarity line for?

The white line runs along one of the two conductors to help identify polarity (positive/negative) at both ends of the cable. Consistent polarity across all speakers in a system prevents phase cancellation and maintains proper sound reproduction.

Can the two cores be separated?

Yes. The figure 8 profile allows the two conductors to be pulled apart at termination points without cutting through additional insulation, making it easier to strip and connect to speaker terminals or binding posts.