Is ofc wiring kits better than cca, when it come to fire resistant?

OFC (oxygen free copper) wire conducts better than CCA (copper clad aluminum) so will run cooler. It is definitely superior to CCA, that’s why it costs so much more.

Is the fuse supposed to come in the fuse holder? Or do you need to get that separate?

It comes with it. It’s included!

Would this work with a 4,000 watt amp?

That depends on the amp. What is the amp rated for on rms? Typically amps that quote 4,000 watts don’t truly produce 4,000 watts. They peak at 4,000 and only if they are bridges down to zero ohms. Also, if you are buying an amp that can push even 2-3000 watts and speakers that can handle it. Then don’t skimp on price and go with a zero gauge amp kit. But with that much power you will also need capacitors, and over sized battery, over sized alternator. And so on. So I highly doubt you are going to be truly pushing 4000 watts. Sounds like you really need to do some homework on car audio systems and learn a lot more before you buy anything.

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Description

⚡ Power your sound like a pro with SoundBox’s ultimate amp install kit!

COMPLETE PRO KIT - All essential wires, terminals, protective loom, and ties included for a seamless, professional amplifier install.
CRYSTAL CLEAR SOUND - Triple shielded twisted pair RCA cables minimize interference, delivering pristine audio clarity.
PURE POWER DELIVERY - 100% Oxygen Free Copper ensures maximum conductivity and minimal signal loss for your amp’s peak performance.
SAFETY FIRST ALWAYS - Includes a robust 150 Amp ANL fuse and inline fuse holder to protect your system from power surges.
BUILT TO BEND NOT BREAK - SuperFlex wire jackets provide effortless installation around tight curves without compromising durability.

The SoundBox 4 Gauge Oxygen Free Copper Amplifier Install Kit offers a comprehensive, high-quality wiring solution featuring 18 ft of 4 AWG pure copper power wire, triple shielded RCA cables, and a 150 Amp ANL fuse. Designed with SuperFlex jackets for easy installation and maximum durability, this kit ensures superior conductivity, interference-free audio, and reliable system protection for professional-grade amplifier setups.

Specifications

Brand	SoundBox
Connector Type	RCA
Cable Type	Composite
Compatible Devices	Speaker
Special Feature	Braided
Color	Red
Connector Gender	Male-to-Male
Shape	Round
Number of Pins	2
AC Adapter Current	150 Amps
Unit Count	1.0 Count
Specification Met	Likely Meets Industry Standards for Amplifier Installation Kits
Indoor/Outdoor Usage	Indoor, Outdoor
Number of Items	1
Maximum Voltage	12 Volts (DC)
Outer Material	Copper
Manufacturer	SoundBox
UPC	859256005976
Item Weight	5.52 pounds
Package Dimensions	10.91 x 10.28 x 3.46 inches
Item model number	TCK4
Is Discontinued By Manufacturer	No
Manufacturer Part Number	TCK4
Special Features	Braided

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