Gravity GR-50PX 50.0 Farad Capacitor and 0 Gauge Amp Kit - Power

Our review of the Gravity GR-50PX looks at a niche but practical solution for car audio enthusiasts who need rapid power delivery for high-output systems. This kit combines a large 50.0 farad stiffening capacitor with a completed 0 gauge amplifier wiring set, giving installers a single package to reduce voltage sag during heavy bass hits. The review finds it particularly useful where the vehicle battery and alternator struggle to keep voltage steady at high loads, and the included hardware makes it straightforward to add a capacitor and heavy power feed without sourcing separate cables.

Key Features

• 50.0 Farad capacitor: provides a large local charge reservoir to smooth transient voltage drops and support peak amplifier demand.
• 0 gauge power cable: includes a high quality 17 ft 0 gauge power cable to run from the battery or distribution block with minimal voltage drop.
• 0 gauge ground cable: supplies a premium 3 ft 0 gauge ground cable to ensure a low resistance return path for clean, stable grounding.
• Digital red voltage display: chrome plated battery post with a readout lets you monitor system voltage at a glance while installed.
• High temperature rating: rated for operation from -20 to +105C so it withstands harsh vehicle environments.
• Inline protection: includes an ANL fuse holder and 150A fuse to protect the main feed during faults.

Who It's For

This kit is best for car audio hobbyists and installers building systems up to moderate to high power where short-term current demands create visible voltage dips. It is useful when adding midsize to large amplifiers totaling significant RMS power and where a capacitor helps keep lights and head units stable during bass peaks.

It is less appropriate for those who already have a high-output alternator or a dedicated secondary battery system, or for very small systems that never approach high transient current draw. If you need a full battery replacement or multi-battery setup, look for a battery-focused solution instead.

Pros & Cons

Pros

• Large 50.0 F capacitance provides rapid charge/discharge to reduce audible sag during peaks.
• Includes thick 17 ft 0 gauge power and 3 ft 0 gauge ground cables to simplify installation without sourcing separate parts.
• Digital readout and chrome plated post make monitoring voltage convenient and installation tidy.
• High temperature rating and an inline 150A ANL fuse add durability and basic protection for vehicle use.

Cons

• The kit is focused on transient support; it does not replace the sustained energy capacity of a battery or alternator upgrade.
• At high system power levels, a capacitor alone may not fully eliminate all voltage sag without additional electrical upgrades.

Specifications

Capacitance	50.0 Farad
Power cable	17 ft 0 gauge (thick high quality)
Ground cable	3 ft 0 gauge premium
Fuse	Inline ANL fuse holder with 150A fuse
Voltage rating	20V working, 24V surge
Operating temperature	-20 to +105C
Display	Digital red voltage display, chrome plated post

Our Verdict

The Gravity GR-50PX is a practical, value-oriented capacitor and amp wiring kit for installers who want to reduce transient voltage sag without extensive electrical upgrades. It combines a substantial 50.0 F capacitor, solid 0 gauge wiring, a voltage display and a protective ANL fuse into a single package, making it a convenient choice for mid to high-output car audio builds that need cleaner voltage during bass peaks.

Frequently Asked Questions

Will this capacitor replace a second battery?
Answer. No, the capacitor supplies very fast bursts of current for short peaks but does not provide the sustained energy capacity of a secondary battery.

Is the included fuse adequate for most installs?
Answer. The kit includes a 150A ANL fuse which protects the main power feed for many high-power systems, but installers should verify fuse sizing for their total amplifier draw.

Can the digital display be mounted remotely?
Answer. The display is integrated with the chrome plated battery post; installation location options depend on available panel space and cable routing in the vehicle.