Metra Amp Kit Tested: Top 10 Options Reviewed

I’ve spent countless weekends installing car audio, and I know that the amplifier is only as good as the wiring connecting it. Trying to save money on a cheap metra amp kit usually results in noise, frustration, or even damaged equipment. If you’re upgrading your system, you need reliable power and signal transfer. I’ve broken down ten of the most popular and varied amplifier wiring kits available, from specialized harnesses to heavy-duty gauge setups, so you can choose the best foundation for your sound system.

IMAGE	PRODUCT NAME	AMAZON LINK
	Install Bay 4 Gauge 1600 Watt Value AMP Kit Complete	View on Amazon
	BOSS Audio Systems KIT2 8 Gauge Complete Car Amplifier…	View on Amazon
	DS18 AK4 Complete 4 Gauge CCA Amplifier Installation Wiring…	View on Amazon
	RD True 4 Gauge Car Audio Cable Amp Wiring Kit…	View on Amazon
	Complete 2500W Gravity 4 Gauge Amplifier Installation…	View on Amazon
	AgClover 8 Gauge Amp Wiring Kit, 100% OFC Oxygen Free…	View on Amazon
	Skar Audio 4 Gauge Amplifier Wiring Kit – Blue, Copper…	View on Amazon
	Gravity Complete 2600W 4 Gauge Amp Kit Amplifier Install…	View on Amazon
	Ruikarhop 0 Gauge Amp Wiring Kit,3000 Watt Amplifier Sub…	View on Amazon
	METRA – FLH And FLT Amp Wiring Kit Front Fairing…	View on Amazon

Install Bay 4 Gauge 1600 Watt Value AMP Kit Complete

This kit offers a budget-conscious entry point for installers needing a solid 4-gauge setup capable of handling mid-range power systems, typically up to 1600 watts (depending on the amp’s actual draw). It includes all the essential components necessary to get your amplifier powered up and running, focusing on core cables and connectors. While it prioritizes value, the inclusion of a dedicated remote turn-on wire ensures seamless integration with your head unit. It’s a straightforward, no-frills option designed to minimize complexity during installation.

Key features that stand out:
* Amp Kits: Comprehensive kit for 1600-watt systems
* 4 Gauge Value Amp Kit: Provides sufficient current flow for most aftermarket amps
* 17FT 18GA Blue REMOTE TURN-ON WIRE: Adequate length for connection to the deck

• Pros: Excellent price point; includes all necessary power and ground wire lengths; straightforward installation.
• Cons: The wiring material is typically CCA, which isn’t as efficient as OFC copper.
• Best for: Budget installations and systems running amplifiers under 1000W RMS.
  Expert Opinion: This is a fantastic starter metra amp kit for those dipping their toes into car audio upgrades. It provides the basics reliably, but higher-end systems should look for a kit with better cable conductivity.

BOSS Audio Systems KIT2 8 Gauge Complete Car Amplifier Installation Wiring Kit with Power Cables, Ground Cables, Turn-On Wire, Speaker Wire, Terminals

The BOSS Audio Systems KIT2 is a highly popular, comprehensive 8-gauge kit, perfect for powering smaller mono or multi-channel amplifiers used for speakers or light subwoofers. It goes beyond the bare essentials by including items like split loom tubing and wire ties, ensuring a cleaner, more professional install. The durability of the well-insulated wiring and the high-performance RCA interconnect are highlights, promising clear signal transmission and protection against interference.

Key features that stand out:
* Complete Car Amp Wire Setup: Includes all cables, grommets, and ties for a clean install
* Power Cable and Fuse Holder: Features a 20-foot, 8-gauge red power cable and sturdy competition fuse holder
* Well Insulated Blue Wiring: Reliable 16 Foot / 18 Gauge Blue Turn-On Wire
* Durable RCA Connector: Equipped with a 20 Foot High-Performance RCA Interconnect
* Audio Wiring Inclusions: Includes wire ties and rubber grommets for wire management

• Pros: Extremely complete kit with excellent accessory management items (ties, grommets); long RCA cable and speaker wire included; good value for 8-gauge systems.
• Cons: 8 gauge is insufficient for powerful subwoofer amplifiers over 500W RMS.
• Best for: Small speaker amplifiers (4-channel amps) or low-power mono subwoofer systems.
  Expert Opinion: BOSS provides a lot of value in terms of accessories. If you’re installing an amp to run aftermarket door speakers, this metra amp kit is often all you need, offering a cleaner signal path than many budget competitors.

DS18 AK4 Complete 4 Gauge CCA Amplifier Installation Wiring Kit – Ampkit Helps Make Connections, Brings Power to Your Radio, Subwoofers, Speakers with Super Flex Wire – 1200W for 1 Amplifier

DS18 is well-regarded in the mobile audio space, and the AK4 kit lives up to their reputation for flexibility and completeness. This 4-gauge CCA kit is rated for systems up to 1200W and features “Super Flex Twist” premium cables, making the wiring process much easier, especially when routing cables through tight spots in the vehicle chassis. It includes a robust ANL fuse holder with an 80 amp fuse, providing better protection than traditional AGU fuses for high-current applications.

Key features that stand out:
* COMPLETE AMPLIFIER WIRING KIT: Designed for easy installation of 1 amplifier up to 1200W
* BLACK/RED WIRE: 17ft 2-channel shielded twisted pair of RCA premium audio cable
* INSTALLATION PACKAGE: All necessary terminals, wire ties, and wire loom included
* HIGH QUALITY MATERIALS: Super flex twist premium cables & Copper-Clad Aluminum (CCA) wires
* EVERYTHING INCLUDED: Generous lengths of power, ground, speaker, and remote turn-on wire

• Pros: Highly flexible cables make routing simple; excellent shielding on the RCA cables reduces noise; very comprehensive installation package.
• Cons: Uses CCA, which degrades performance slightly compared to OFC.
• Best for: Enthusiasts needing highly flexible 4-gauge wiring for tight installations.
  Expert Opinion: The flexibility of the DS18 AK4 is its biggest selling point. If you hate fighting stiff power cables under the carpet or dash, this metra amp kit is worth the investment just for the reduced installation time.

RD True 4 Gauge Car Audio Cable Amp Wiring Kit – 2 Channel Rock Direct CCA Power Cable Amplifier Install Wiring Kit

The RD (Rock Direct) True 4 Gauge kit emphasizes providing true, complete 4-gauge sizing, ensuring the gauge rating isn’t inflated. This CCA kit includes tinned OFC RCA signal cable, which is a nice hybrid feature, prioritizing clear signal transmission while keeping costs down on the heavy power wiring. The inclusion of a Mini ANL Fuse-holder and an 80AMP fuse guarantees serious electrical protection for powerful amplifier setups.

Key features that stand out:
* True Complete 4gauge CCA: 17ft Power Orange and 3ft Ground Wire Black with Soft Flexible Jacket
* Tinned OFC Oxygen Free Copper: 17ft 2-Channel Twisted Pair RCA Stereo Signal Cable
* Included Blue 18 Gauge 17ft remote turn on lead wire: Also includes 20ft 14GA Orange CCA Speaker Wire
* ROCKDIRECT 80AMP Mini ANL Fuse-holder: Provides robust protection for high-powered systems
* Installation accessories: Includes grommets, spade terminals, and zip ties

• Pros: True 4-gauge size provides confidence in power delivery; uses high-quality tinned OFC for the critical RCA signal cable; aesthetically pleasing orange power jacket.
• Cons: The 14GA speaker wire might be slightly undersized for high-power component speakers.
• Best for: Users who prioritize accurate power ratings and desire upgraded RCA cable quality in a CCA package.
  Expert Opinion: This kit is thoughtfully designed, providing the critical signal quality with OFC RCA cables, while relying on the more affordable CCA for the heavy power runs. It’s a smart balance for a reliable metra amp kit.

Complete 2500W Gravity 4 Gauge Amplifier Installation Wiring Kit Amp Pk2 4 Ga Red – for Installer and DIY Hobbyist – Perfect for Car/Truck/Motorcycle/Rv/ATV, 2500W / RED

Gravity aims high with this kit, marketing it for systems up to 2500W, though caution is advised regarding actual RMS power rating versus peak power. This 4-gauge kit is extremely popular among DIY hobbyists due to its generous cable lengths and inclusion of essential accessories. The true sound double-shielded RCA cable is designed to minimize electrical noise pick-up, a common issue in larger vehicles like trucks and RVs where cable runs are long.

Key features that stand out:
* High quality thick 17 feet ft 4 gauge GA power cable: Provides ample length for most vehicles
* Premium 3 feet ft 4 gauge GA ground cable/ inline agu fuse holder & 100a fuse included!: High amperage protection
* True sound 17 feet ft Double shielded RCA cable: Crucial for noise reduction
* High quality 17 feet ft/ 18 ga turn-on cable & 20 feet ft/ 16 ga speaker wire: Comprehensive component cables
* All accessories/ terminal included!: Highly versatile for different vehicle types

• Pros: Excellent accessory inclusion makes installation easy; high amperage fuse (100A); double-shielded RCA cables are a great benefit.
• Cons: The 2500W rating is likely peak, not RMS, so powerful amps should still verify their needs.
• Best for: Versatile installations across various vehicle types (Car, Truck, RV) where reliable, long runs are needed.
  Expert Opinion: This is a comprehensive 4-gauge metra amp kit. While the high wattage rating should be taken with a grain of salt (4 gauge generally maxes out cleanly around 1500W peak), the overall build quality and terminal accessories are excellent for the price.

AgClover 8 Gauge Amp Wiring Kit, 100% OFC Oxygen Free Copper Complete Amplifier Wire Installation Kit- Make Connections and Brings Power to Car Home and Marine Audio Systems

Unlike most budget-friendly options, the AgClover 8 Gauge kit proudly features 100% OFC (Oxygen Free Copper) for all its components, including the power, ground, speaker, and remote cables. OFC offers superior conductivity and resistance to corrosion compared to CCA, making it ideal for marine or permanent installations where reliability is critical. This focus on 100% OFC sets it apart, ensuring maximum efficiency and minimal power loss for your 8-gauge system.

Key features that stand out:
* Complete Amp Wiring Kit: Includes 100% OFC frosted red power and black ground cable
* Premium Quality Made: Crafted with high-quality material for durability and stable performance
* Versatile Applications: Suitable for automotive, marine, and home audio systems
* Easy to Install: Includes Mini ANL fuse holder and a variety of gold-plated terminals
* Worry-free Shopping: Commitment to customer satisfaction and support

• Pros: True 100% OFC copper throughout provides best-in-class conductivity for its gauge; highly durable and suitable for harsh environments (marine); excellent gold-plated connectors.
• Cons: 8 gauge limits the potential output of very large amplifiers.
• Best for: Anyone prioritizing conductivity and long-term reliability in an 8-gauge setup, especially marine or high-humidity installations.
  Expert Opinion: When choosing a metra amp kit, OFC copper is always preferred for power transfer. The AgClover kit is a standout performer in the 8-gauge category because it doesn’t compromise on material quality, delivering true power to smaller amplifiers.

Skar Audio 4 Gauge Amplifier Wiring Kit – Blue, Copper Clad Aluminum, SKAR4ANL-CCA

Skar Audio specializes in high-power subwoofer systems, and their SKAR4ANL-CCA kit is built to support the demands of systems up to 1,200 watts. This 4-gauge CCA kit is designed for maximum power delivery in an affordable package, featuring a highly flexible matte blue power cable. The inclusion of a 100 Amp ANL Fuse and holder provides a high level of protection suitable for aggressive, bass-heavy installations.

Key features that stand out:
* 4 Gauge CCA Complete Amplifier Wiring Installation Kit: Specifically engineered for power applications
* Great for Installing Systems up to 1,200 Watts: Designed with high current demands in mind
* Includes 2-channel RCA Interconnect Cable: Essential for signal transfer
* 17 Ft – 4 Gauge CCA Matte Blue Max-flex Power Cable: Flexible design for easy routing
* In-line ANL Fuse Holder and 100 Amp ANL Fuse Included: Superior current protection

• Pros: Extremely high 100A fuse rating for powerful setups; matte finish cable jacket is highly flexible; excellent pricing for a 4-gauge kit.
• Cons: The brown ground cable is an unusual color choice for a visible installation.
• Best for: High-wattage subwoofer setups where cost-effective, high-amp CCA wiring is acceptable.
  Expert Opinion: Skar knows power, and this metra amp kit reflects that. If your focus is purely on bass and you have a matching Skar amplifier, this kit provides reliable, high-current delivery without breaking the bank.

Gravity Complete 2600W 4 Gauge Amp Kit Amplifier Install Flexible Wiring Complete 4 Ga Installation Cables for Installer and DIY Hobbyist – Blue

Similar to its red counterpart, the Gravity 2600W 4 Gauge kit provides a comprehensive and flexible wiring solution, this time featuring a vibrant blue power cable jacket. It maintains the high standard of accessory inclusion and offers a double-shielded RCA cable to minimize noise interference. This kit is perfect for users who need a robust 4-gauge setup with long component cable runs for larger vehicle platforms.

Key features that stand out:
* High Quality Thick 17 Feet FT 4 Gauge GA Power Cable: Generous length and thickness
* Premium 3 Feet FT 4 Gauge GA Ground Cable / Inline AGU Fuse Holder & 80A Fuse Included!: Reliable grounding and protection
* True Sound 17 Feet FT Double Shielded RCA Cable: Vital for signal clarity
* High Quality 17 Feet FT / 18 GA Turn-On Cable & 20 Feet FT / 16 GA Speaker Wire: Comprehensive component wiring
* All Accessories / Terminal Included!: Highly useful for any installer or serious hobbyist

• Pros: Excellent flexibility; double shielding on the RCA cable ensures less signal degradation; includes both 17ft remote turn-on and 20ft speaker wire.
• Cons: The AGU fuse holder is often considered less robust than ANL fuse holders.
• Best for: General 4-gauge installations in standard cars and trucks prioritizing flexibility and a comprehensive accessory package.
  Expert Opinion: When comparing different 4-gauge options, Gravity consistently delivers a highly usable and complete metra amp kit. The flexibility makes installation hassle-free, which is often worth more than saving a few dollars on a stiffer cable.

Ruikarhop 0 Gauge Amp Wiring Kit,3000 Watt Amplifier Sub Installation Kit Make Connections and Brings Power to Your Radio,Subwoofers and Speakers

When you need serious power—over 1500W RMS—a 0-gauge kit is essential, and the Ruikarhop kit delivers. This heavy-duty system is rated up to 3000 watts and uses OFC wire for the critical grounding cable, ensuring superior return path conductivity. The sheer size of the 17-foot 0 gauge red power cable means minimal voltage drop, even with massive power demands from competitive subwoofer systems.

Key features that stand out:
* 17 FT 0 Gauge Red Power Cable: Heavy-duty power handling capability
* 3 FT Hlgh Performance Car Grounding OFC Wire: Prioritizes high-quality OFC for the ground connection
* 17 FT Blue Remote Turn-on wire; 17FT High Performance RCA Interconnect Cable; 17FT Speaker Cable: All essential components are included
* Gold Plated AGU In-line Fuse: Features a maximum current rating of 100A
* Top quality and construction of material: Thick, strong rubberized sleeves for durability

• Pros: Necessary 0-gauge size for very high-power amps; uses OFC for the critical ground wire; low noise and distortion due to heavy shielding.
• Cons: 0 gauge cable can be extremely difficult to route through firewall grommets in some vehicles.
• Best for: High-end audio builds, extreme subwoofer setups, and competitive audio environments requiring 3000W capability.
  Expert Opinion: If your amplifier uses large, high-amperage fuses, you must use a heavy gauge like this. The Ruikarhop metra amp kit provides the necessary bulk and protection (via the 100A fuse) to run serious power safely.

METRA – FLH And FLT Amp Wiring Kit Front Fairing 2014-Up (BC-9703)

The final item on our list is a highly specific, specialized solution: a genuine Metra harness designed specifically for installing dual amplifiers in the fairing of 2014 and up Harley Davidson FLH and FLT motorcycles. This is not a generic amplifier wiring kit; it’s a dedicated harness solution. It features 8-gauge OFC power and ground wire, splitting to two 10-gauge outputs, providing dedicated power taps for two separate amplifiers in a compact, safe package.

Key features that stand out:
* Dual amp installation harness: Specifically designed for running two amplifiers simultaneously
* 5.5ft. power and ground 8ga OFC: Uses high-quality OFC material in a compact length
* Over mold split to (2) 10ga power and ground: Dedicated outputs for dual amplifiers
* 60 amp mini ANL fuse and holder: Excellent protection in a small footprint
* Quick disconnect for each amp; Ignition T-Harness included: Simplifies wiring and amp removal

• Pros: Perfect plug-and-play solution for specified Harley Davidson models; uses OFC wiring; includes ignition T-Harness for clean remote turn-on connection; simplifies complicated motorcycle wiring.
• Cons: It is entirely limited in application to a single motorcycle platform.
• Best for: Harley Davidson FLH/FLT owners (2014+) installing multiple fairing amplifiers who need a clean, reliable, dedicated harness.
  Expert Opinion: This dedicated metra amp kit solves a major headache for motorcycle audio installers. Using a specialized harness like the BC-9703 is far safer and more reliable than trying to custom-wire multiple amps in a damp, vibration-heavy motorcycle fairing.

Helpful Comparison Short Insights

Choosing the right metra amp kit often comes down to balancing cost with material quality and your amplifier’s power demands.

Gauge Size Matters Most: For most amplifiers over 1200 Watts RMS, you must use 0 gauge wiring, like the Ruikarhop kit, to prevent voltage drops and overheating. Standard subwoofer amps (500W-1000W) or larger multi-channel speaker amps are typically served well by 4 gauge kits (DS18, Skar Audio). 8 gauge kits (BOSS, AgClover) are suitable only for low-power applications, usually under 400W RMS.

OFC vs. CCA: Most budget kits, such as Install Bay and Gravity, use CCA (Copper Clad Aluminum). CCA is cheaper and lighter, but it has about 60% of the conductivity of pure copper. For pure power and minimal resistance, always check if the kit specifies 100% OFC, like the AgClover kit, as this ensures maximum conductivity over distance and superior resistance to corrosion.

Specialized Needs: If you own a modern Harley Davidson, a generic wiring kit won’t cut it. The specialized METRA – FLH And FLT Amp Wiring Kit is essential because it provides a dedicated, fused harness designed to handle the cramped, power-hungry motorcycle environment safely.

Final Verdict

The quality of your wiring directly impacts the performance and safety of your car audio system. The search for the ideal metra amp kit often comes down to matching power requirements with material quality.

For installers focusing on reliability and true copper performance for a mid-power system, the AgClover 8 Gauge OFC kit stands out; even though it’s 8 gauge, the 100% OFC material makes a huge difference in power stability. If you need serious, budget-friendly power for high-wattage subwoofers, the Ruikarhop 0 Gauge provides massive capacity and necessary protection.

However, if you are simply looking for the most comprehensive and flexible CCA kit for a standard 4-gauge installation up to 1200W, the DS18 AK4 Complete 4 Gauge provides exceptional flexibility and value right out of the box. Choose your gauge based strictly on your amp’s fuse ratings, and remember that investing slightly more in shielded RCAs (like those found in the Gravity kits) is crucial for eliminating background noise.

Common Questions About metra amp kit Installation

What is the primary difference between OFC and CCA wiring?

The difference lies in conductivity and cost. OFC (Oxygen Free Copper) is pure copper, offering the best electrical conductivity, superior flexibility, and better corrosion resistance. CCA (Copper Clad Aluminum) uses an aluminum core coated with copper. While much cheaper, it requires a thicker cable to carry the same current as an OFC wire, and it is prone to oxidizing faster, making OFC the better choice for permanent or marine audio setups.

What gauge metra amp kit do I need for my amplifier?

The necessary gauge size depends on two factors: the amplifier’s power rating (RMS) and the length of the run from the battery to the amp.
* 4 Gauge: Good for systems up to 1500 Watts (peak), 600-1000W RMS.
* 8 Gauge: Suitable for lower-power multi-channel amps, typically under 500W RMS.
* 0 Gauge: Required for high-power installations over 1500W RMS. Always check the manufacturer’s recommendation or use a gauge chart based on your amplifier’s total fuse rating.

Do I need a specialized metra amp kit for my motorcycle or boat?

Yes. While a standard car audio metra amp kit can technically provide power, dedicated solutions like the METRA – FLH And FLT Amp Wiring Kit for motorcycles are highly recommended. These specialized harnesses use high-quality OFC wire in short runs, feature weatherproof connectors, and often include dedicated turn-on leads tailored to the vehicle’s electrical system, drastically improving safety and reliability in harsh environments.

Are the fuses included in these kits reliable?

The fuse and fuse holder are the most critical safety components of any metra amp kit. Kits typically come with either AGU (glass tube), ANL, or Mini ANL fuses. ANL and Mini ANL fuses (used in kits like the Skar Audio and DS18 options) are generally more reliable for high-current applications because they are blade-style and handle heat dissipation better than traditional AGU fuses. Always ensure the fuse rating matches or is slightly higher than the combined fuse rating of your amplifier.

What is the blue wire and why is it included in every kit?

The blue wire is the remote turn-on wire. It is a small 18-gauge wire that runs from the head unit (car stereo) back to the amplifier. When you turn on your radio, the head unit sends a small 12V signal through this blue wire, which tells the amplifier to “turn on.” This prevents the amplifier from drawing current constantly and draining your car battery.

Can these amplifier wiring kits be modified or extended?

Yes, they can be modified, but it should be done carefully. If a power cable is too short, you must use a proper distribution block or a high-quality connector (like a set screw coupling) to maintain a secure connection and gauge consistency. Never splice a large power cable with simple electrical tape and crimp connectors, as this creates a serious fire hazard and causes voltage loss.