About the Crutchfield CK4
Deliver the power your amp deserves
Crutchfield's 4-gauge amplifier wiring kit contains the wire and hardware necessary to supply power to your amplifier safely, efficiently, and economically. This wiring kit does not include RCA patch cables or speaker wire. You may need to purchase those items separately, in order to complete your installation.
Deliver the power your amp deserves
Crutchfield's 4-gauge amplifier wiring kit contains the wire and hardware necessary to supply power to your amplifier safely, efficiently, and economically. This wiring kit does not include RCA patch cables or speaker wire. You may need to purchase those items separately, in order to complete your installation.
Power ratings and amp efficiency
Most amplifiers come in two distinct "Classes" of technology with different efficiencies and power wire size requirements. Class AB amps typically feature 50% to 60% efficiency, while Class D amps are usually 75% to 80% efficient. This Crutchfield wiring kit was designed to accommodate the energy demands of a Class AB amplifier with a total output of up to 700 watts RMS, or a Class D amp with up to 1,100 watts RMS output.
Crutchfield wire
Crutchfield wire is made of oxygen-free copper, with no impurities that could raise its resistance to a signal's flow or add interference. Crutchfield wire meets all Consumer Technology Association (CTA-2015) standards for size, resistance, and insulation quality.
Product highlights:
- amplifier wiring kit
- RCA cables and speaker wire not included
- maximum power ratings: Class AB: 700 watts RMS, Class D: 1100 watts RMS
- oxygen-free copper wires meet all ANSI and CEA standards
- 17 feet (5.2m) of 4-gauge red power wire with ring terminal
- 3 feet (0.9m) of 4-gauge black ground wire with ring terminal
- 17 feet (5.2m) of 18-gauge blue remote turn-on lead wire
- brass mini-ANL fuse holder and two 50A fuses (100A total rating)
- assorted hardware
- 6 feet (1.8m) of 4-gauge black split loom
- 4-gauge firewall bushing
- two 22-18-gauge butt connectors
- six wire ties
- warranty: 1 year
- Our 60-day money-back guarantee
- MFR # CK4
What's in the box:
- 17' Length of 4AWG power wire (red translucent jacket and terminated with ring-terminal on one end)
- 3' Length of 4AWG ground wire (black translucent jacket and terminated by a ring-terminal on one end)
- 17' Length of 18AWG remote turn-on wire (blue jacket)
- Fuse holder
- Two 50A Mini-ANL fuses (installed in fuse holder)
- Firewall bushing
- 2 Butt-connectors
- 6' Length of split loom
- 6 Wire ties
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More details on the Crutchfield CK4
Researched by Crutchfield's Mark G.
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Features & Dimensions
Power & Ground Wire:
- Gauge: 4 AWG
- Wire Construction: Tinned Oxygen Free Copper (1862 strands)
- Length: 17' (Power), 3' (Ground)
- Diameter: 0.425"
Terminals:
- Terminal Type: Nickel-plated brass ring-terminal (on Power & Ground wire)
- Terminal Diameter: Outer Diameter = 0.635", Inner Diameter = 0.315"
Fuse:
- Fuse Type: Mini-ANL (x2)
- Fuse Size: Two 50A fuses in the parallel arrangement provide 100 total amps of protection (pre-installed in fuse-holder)
- Fuse Holder: The included fuse holder should be installed within 18" of the battery; a 4mm Allen wrench is required for installation (not included)
Remote Turn-On Wire:
- Gauge: 18 AWG
- Wire Construction: Tinned Oxygen Free Copper (16 strands)
- Length: 17'
- Diameter: 0.105"
Included Accessories:
- Grommet: 4 AWG firewall bushing
- Butt-connectors: 22-18 AWG butt-connectors (2)
- Loom: 6' length of 4 AWG split-loom
- Wire-ties: 6
Installation Notes:
- RCA cables and speaker wire not included (sold separately)
- Installation tools sold separately
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Customer Q&A
17 questions already asked
Q
I have an audio control LC-6.1200. It has 3 40amp fuses. I purchased a 150 amp fuse with my installation kit. Do I install both 150 amp fuses in the fuse holder or just the one?
[ DEREK Jun 15, 2022 ]
1 answer
A
You will install just one!
[ Thomas Jun 15, 2022 ] Staff
Q
I see the question here many times but the answers are fuzzy at best. This kit comes with a fuse block that accepts 2 fuses. 1 power in, 1 power out. Here's the question. If my amp is rated to be fused with a 40 amp fuse, do I put 2 40 amp fuses in the block, do I put 2 20 amp fuses in the block, or do just install 1 40 amp fuse and leave the other side empty??,? ?
[ KEVIN Aug 31, 2021 ]
1 answer
A
You could use 1 40A fuse (other slot left empty) or 2 x 20A fuses in this kit for an amp that is rated to need 40A fuse for protection
[ JASON Sep 04, 2021 ] Staff
Q
Can I ground to the battery? It's in my trunk where the amp will be
[ THOMAS K Aug 05, 2021 ]
1 answer
A
While it is technically possible to ground to the battery directly this is not good install technique. Any amplifier or electronics being add to a car system should be given it's own ground connection directly to the chassis of the vehicle. Grounding directly to the battery negative terminal is not recommended due to possible issues with noise in the sound system and possible damage to the aftermarket gear.
If the factory battery ground cable becomes loose or is compromised in some way then the current for other vehicle systems may flow through the sound system and destroy it. For example when the vehicle starter motor is being cranked. That massive current draw would damage the entire sound system in just a few seconds.
Don't ground directly to the battery negative terminal and do not stack multiple grounds atop one another. If there are multiple amps being added then use a ground distribution block for those.
[ Jeff Mar 28, 2022 ] Staff
Q
Is it acceptable to use the supplied Red 4g wire from battery to the fuse box or should I use solid wire between batter and the box?
[ CHRISTOPHER Jun 06, 2021 ]
2 answers
A
Hi C, I would double check with crutchfield. I wound up returning due to getting a different car. I'm pretty sure you should use an inline fuse to protect any equipment if some should happen.
[ JOE Jun 10, 2021 ]
A
The Red 4ga wire is made to handle the large amounts of current your amplifier needs with very little loss. Not only would hooking to the fuse box defeat this, it would likely be a safety hazard as well. Best practices recommend wiring direct to the battery terminal with a fuse as close as practical to the battery. There are connectors available to assist you in hooking to the battery. The fuse should be sized to properly protect the 4ga wire. It's common for people to hook the black wire to the frame of the vehicle or to a significant area such as a seat bolt, this is why the black wire is often much shorter than the Red one. The black wire must be hooked to a clean surface, wire brush or wheel to clean to bare metal is a good way to do it.
Even though there is a tough jacket on the Red wire, the protective split loom should be used to cover the wire in any place that could ever wear through and cause a short circuit, like thru the firewall. I've used install kits from Crutchfield MANY times and always had excellent results. They're my go-to source for sure!!!
Good Luck!!! (if you aren't sure of yourself, you may want to consult a professional to install for you)
[ RANDALL Jun 10, 2021 ]
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Came with almost everything you would need for an amp install, however if running a capacitor it does not come with extra ring terminals to connect to said cap, so be mindful but is perfect otherwise.
Nicholas from APPLING, GA