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Power Pack Connection Kit

12-gauge wiring kit for high-power car stereos

| 4 questions - 8 answers

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Item # 700POWERPK

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Our take on the Power Pack Connection Kit

If you're installing a car stereo with a high-powered amp, you can wire it to your existing car wiring only if your factory radio is protected by a 15-amp (or larger) fuse. If your vehicle uses a smaller fuse, this handy kit contains everything you need to connect a high-powered car stereo to your battery safely.

The package includes:

With a couple of common tools, you'll be all set. Get the hardware you need in one convenient package. Warranty: 60 days.

What's in the Box:

  • 20' Red wire (12 AWG)
  • 10' Black wire (12 AWG)
  • Four 10-12 Gauge 3/8" Ring terminals
  • Four 10-12 Gauge 5/16" Ring terminals
  • Four 14-16 Gauge 3/8" Ring terminals
  • Four 14-16 Gauge 5/16" Ring terminals
  • Four 16-22 Gauge 3/8" Ring terminals
  • Four 16-22 Gauge 5/16" Ring terminals
  • 2 Black 12- to 18-gauge Posi-Fuse Blade Fuse Holders
  • Two 10-amp ATC fuses
  • One 15-amp ATC fuse
  • One 20-amp ATC fuse
  • Two 30-amp ATC fuses

Hands-on research

Product Research


Overview: This package includes four separate items, the iBR38 power and ground wire, the iBR17 assorted crimp-on ring terminals, the iBR45 assorted fuses, and two Posi-Products fuse holders.

Fuse Sizes: Included are two 10-amp, one 15-amp, one 20-amp, and two 30-amp fuses.

Ring Terminal Dimensions:

  • 10-12 Gauge 3/8" Ring terminals (Yellow):
    • Inner Diameter: 3/8" (actual measurement is 0.41")
    • Outer Diameter: 0.556"
  • 10-12 Gauge 5/16" Ring terminals (Yellow):
    • Inner Diameter: 5/16" (actual measurement is 0.325")
    • Outer Diameter: 0.590"
  • 14-16 Gauge 3/8" Ring terminals (Blue):
    • Inner Diameter: 3/8" (actual measurement is 0.41")
    • Outer Diameter: 0.537"
  • 14-16 Gauge 5/16" Ring terminals (Blue):
    • Inner Diameter: 5/16" (actual measurement is 0.325")
    • Outer Diameter: 0.472"
  • 16-22 Gauge 3/8" Ring terminals (Red):
    • Inner Diameter: 3/8" (actual measurement is 0.41")
    • Outer Diameter: 0.537"
  • 16-22 Gauge 5/16" Ring terminals (Red):
    • Inner Diameter: 5/16" (actual measurement is 0.325")
    • Outer Diameter: 0.461"

Fuse Holders: The two fuse holders accept 12- to 18-gauge wire in both ends (the included power and ground wire is 12-gauge), and up to a 30-amp ATC, ATO, or MINI blade-type fuse. Just strip the stranded wires, insert them in the caps, and hand tighten - the wire ends are locked between opposing cone shapes to create a dirt-, vibration-, and heat-proof housing. The connectors are also reusable.

Fuse Holder Dimensions:

  • Length: 2.32"
  • Width: 0.38"
  • Height: 0.83"
  • Diameter of Hole in Caps: 0.15"

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

suggested by advisor [ doug  Jul 08, 2016 ]
came with system [ gerald  Jun 27, 2016 ]
Morgan recommended it to me since we did not know if my 2013 Subaru Forester was fused above/below 15 amps, so we wanted to be safe rather than sorry. Morgan's Bio: [ Adam  Apr 25, 2016 ]
Everything I needed for install [ Thomas  Apr 06, 2016 ]
Recommend for alpine amp [ Bryan  Mar 24, 2016 ]
Advisor recommended [ Charles S.  Mar 14, 2016 ]
Recommended and necessary separate high current power wiring for high output Class-D head unit [ Karl  Feb 27, 2016 ]
Recommended by Crutchfield for the amplifier I purchased. [ Marc  Feb 08, 2016 ]
Recommended due to the built in amp [ Kenneth  Jan 30, 2016 ]
Convenience [ Phola Thi  Jan 26, 2016 ]
Crutchfield recommended this item due to the built in power amp, and I like the convenience of not having to source these items individually. This is why I purchase my automotive audio products from Crutchfield. They offer great products, have outstanding customer support, and think of all the little details that can trip you up during an install and point them out to you and offer a pre-packaged solution to make installation a snap! [ Stephen  Dec 31, 2015 ]
safety [ Chris  Dec 30, 2015 ]
Recommended for installation [ GERALD  Dec 18, 2015 ]

4 questions already asked

This kit is designed to run the power red wire directly from the battery to your head unit. Normally your head unit connects to a fuse box along with other electronic items all running off the same power wire or harness. By running a direct wire from the battery you'll have plenty of clean power for your head unit. As far as the ground wire you can connect it anywhere as long as it's bare metal. You'll want to keep the fuse as close to the battery as possible so what I did was cut an 18 inch piece which connected directly to the battery and the other end to the fuse holder. Then use the rest of the red wire to connect to your head unit. Be sure to use a fire wall grommet to prevent the power wire from becoming frayed which will cause a short. [ Glock20  Jun 26, 2016 ]
Sorry James I ended up taking it in to a shop to have it done [ VINCENT  Jun 26, 2016 ]
IT doesn't matter which side, just splice the wires and your good. [ RAYMOND  Jun 26, 2016 ]
All you have to do is connect the amp then run your postive to the battery!! The negative cable(black) to any bolt that is in contact with the body or metal on the car! [ Kevin  Jun 26, 2016 ]
If you purchased the product from Crutchfield, feel free to contact our Tech Support team. Our toll-free Tech Support number is printed on your invoice, and is also available under the "My Orders" tab in the "My Account" section of our website. If you did not purchase the unit from Crutchfield, then you may want to contact the manufacturer. You can also post your question in our forums: Or try our online support center: [ Krissy  Jun 26, 2016 ]  Staff
The wires are insulated. Atleast the kit I recieved did, and I ordered this exact one. About the only time you'll ever receive an unsulated wire, it would be a ground. Which you just run a ground from the amp to the closest bolt inside wherever you mount the amp. But most grounds you get are insulated when it comes to car audio [ RAYMOND  May 18, 2016 ]
Harvey: I'm not familiar with what a Toyota's fire wall looks like under the hood. However, on the firewall of my 2000 VW Beetle, I looked until I found what I would describe as a rubber grommet (insert) through which a cable or wire or something of that sort passed from the inside of the car's cabin to connect at some point under the hood. I'm sure that there has to be something similar to that on the firewall of your Toyota through which you could fish the wire. You may have to punch a hole through the rubber beside of whatever passes through it or you may have to force it through between the rubber and the metal of the firewall and you'll probably have to do some contortions under the dash, as I did, to get the wire started through but I'm sure, with some perseverance, you'll be able to get it through. I sincerely hope I've clearly described this and that you won't have much trouble. Larry [ LARRY  Feb 27, 2016 ]
We have these Posi-Pro wire connectors for installing 10- to 26-gauge wires that would provide an easy way to connect the power wire from the KTP-445U to the 12-gauge wire in the amp kit: [ Larry  Oct 30, 2015 ]  Staff

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