Specifications:
RCA Audio Cable:

Length: ~ 3 metres (for signal connections from head-unit to amplifier/subwoofer)

Shielding: double or even triple shielding (foil + braid/mesh) to minimize noise and interference (important in cars with a lot of electronics)

Conductor: often OFC (Oxygen-Free Copper) for better signal quality and lower resistance.

Impedance (nominal): ~ 75 O (standard for RCA/interconnect cables) when designed for audio.
Masori | Shop

Power Cable (Battery ? Amplifier):

Length: ~ 5 metres (so you can route from car battery to amplifier / subwoofer under seats/boot)

Gauge / Cross-Section: depending on the kit ? common kits use 8 AWG (~10 mm?) or 6 mm? (? approx 8 AWG) for moderate-power systems.

Insulation / Jacket: typically PVC or similar automotive-grade insulation to resist wear, heat, and vibration inside car.
blaupunktcar.in

Ground Cable / Earth Lead:

Length: often shorter (e.g. ~ 0.7 m to 1 m), to ground amplifier to chassis/vehicle body ? depends on placement of amp vs. battery.

Same conductor spec as power cable (similar gauge, copper or CCA) in many kits.

Fuse Holder + Fuse:

Fuse-holder type: usually inline (often AGU type) or ANL style holders ? placed close to battery end of the power cable.

Fuse rating: varies depending on total expected current draw ? common values in moderate car audio kits are from ~20 A up to 60 A (or higher in high-power kits) depending on amplifier/wattage.

Purpose: protect the power cable and car electrical system ? if there’s a short circuit or overload, fuse blows before wires overheat.

Accessories / Kit Contents (often included):

RCA interconnect cable (2-channel stereo) with molded RCA plugs (some gold/chrome plated for corrosion resistance)

Power cable, ground cable, remote turn-on lead (for amplifier turn-on from head-unit signal)

Fuse holder + fuse, ring/spade terminals or connectors, cable ties or cable-tie clips, maybe a split-loom tube or protective sleeve for clean wiring and insulation.