Gravity

Gravity BGR-KIT4-PK1-RED-2500W 4 Gauge Amp Wiring Kit

Everything needed to wire a 2500W amp cleanly — 17 feet of 4-gauge power cable, inline fuse, shielded RCA, and all terminals in one kit.

$29.99*
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*Price sourced from Amazon.com. Last updated:Aug 29, 2026.Price and availability are subject to change — details.

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Overview

The Gravity BGR-KIT4-PK1-RED-2500W is a complete amplifier installation kit built around 4 AWG power and ground cable, rated for audio systems up to 2500W. The kit addresses every connection point in the amplifier power circuit: 17 feet of 4-gauge power cable for the battery-to-amp run, 3 feet of matching 4-gauge ground cable, an inline AGU fuse holder with a 100A fuse pre-installed, 17 feet of double-shielded RCA interconnects for the signal path, an 18-gauge turn-on lead, 20 feet of 16-gauge speaker wire, and a full complement of ring terminals. For the target power range, 4 AWG is an appropriate conductor cross-section — it handles the current demands of most amplifiers in the 500W–2500W bracket without the resistance losses that plague undersized OFC or CCA cables.

This kit is aimed at both DIY home installers and professional 12-volt technicians who need a cost-effective, complete solution without sourcing individual components. It's compatible with a wide range of vehicle types — the product specs call out car, truck, motorcycle, RV, and ATV applications — making it a versatile shelf item for varied installs. The main practical limitation is the 3-foot ground cable, which constrains where the amplifier can be positioned relative to a solid chassis ground point. Installers with amps mounted in the rear of trucks or cargo vans should budget for an additional ground cable. The RCA shielding quality is the standout specification in this kit, as it directly affects signal integrity on long head-unit-to-amplifier runs where interference pickup is most likely.

Specifications

Power Cable
17 ft, 4 AWG
Ground Cable
3 ft, 4 AWG
Fuse Holder
Inline AGU
Fuse Rating
100A
RCA Cable
17 ft, double-shielded
Turn-On Cable
17 ft, 18 AWG
Speaker Wire
20 ft, 16 AWG
Maximum Power Rating
2500W
Terminals
All necessary terminals included

Frequently Asked Questions

The kit is rated for up to 2500W systems. The 4-gauge power and ground cables are the determining factor — 4 AWG is appropriate for amplifiers drawing up to roughly 200A continuous, which covers most single or dual amplifier setups in the 1000–2500W range. Pushing a 4000W+ mono block on this gauge will introduce voltage drop under hard transients.
For the majority of car and truck installs — amplifier in the trunk or under a rear seat, battery in the engine bay — 17 feet covers the run with enough slack for routing through grommets and around obstacles. Larger vehicles like full-size vans, extended-cab trucks, or RVs may come up short and require supplemental cable.
Yes. The included 17-foot RCA cables are listed as double-shielded with what Gravity describes as "True Sound" construction. Double shielding reduces RF and EMI interference pickup along long cable runs, which is the primary cause of alternator whine in audio systems.
Yes. An inline AGU fuse holder with a 100A fuse is included and should be installed within 18 inches of the battery positive terminal. This is the correct protection point for the power cable — it protects against a short between the battery and the amplifier's internal fuse.
The included speaker wire is 16 AWG at 20 feet. 16 gauge is the industry standard for amplifier-to-speaker runs under 20 feet and is appropriate for most component or coaxial speaker setups. For high-excursion subwoofer connections at high power, consider upgrading to 12 or 14 AWG on that specific run.