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:Jul 14, 2026.Price and availability are subject to change.
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Overview
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
Pros & Cons
👍 Pros
- 17-foot 4-gauge power cable provides enough length for most passenger car and truck trunk installs without splicing
- Double-shielded RCA cables are included at full 17-foot length, reducing the chance of alternator whine on long head-unit-to-amp runs
- Inline AGU fuse holder with 100A fuse is included, covering the critical battery-protection requirement out of the box
- All necessary ring terminals and connectors are included, reducing mid-install hardware store trips
- Kit supports vehicles beyond cars — motorcycle, RV, and ATV installs are within spec
👎 Cons
- 3-foot ground cable is short for amplifiers mounted far from a chassis ground point, often requiring a supplemental ground run
- 16-gauge speaker wire is acceptable for mid-range speakers but undersized for high-current subwoofer connections at the upper end of the 2500W rating
- No instructions or wiring diagram included — first-time installers will need to source a wiring guide separately
- AGU fuse format is less common than AFS or ANL formats, which may complicate future fuse replacement if AGU fuses aren't locally stocked
Frequently Asked Questions
What amplifier power rating is this kit actually rated to handle?
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.
Is 17 feet of power cable enough for most vehicle installs?
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.
Are the RCA cables double-shielded against alternator whine?
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.
Does the kit include a fuse for the power cable near the battery?
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.
What gauge is the speaker wire included, and is it sufficient for door speakers?
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.
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