Garage
Shop

Customer Ratings & Reviews


BOSS R4004 1600W 4-Channel Car Audio Power Amplifier w/Remote+8 Gauge Amp Kit thumbnail image
View product page

5 star
67%
4 star
27%
3 star
7%
2 star
0%
1 star
0%



Durability
4.8
Value
4.7
Features
4.8
Design
4.8
Usability
4.9

Customer Reviews

Sort by:

Loading...

Nice harness

The following review is for TC4KIT-8B, which is a part of the bundle you are viewing.

Good kit did exactly what it needed to do good job Sonic Electronix

By Kelly on August 13, 2015

26 found this helpful


Gets the job done

The following review is for TC4KIT-8B, which is a part of the bundle you are viewing.

These were included in a package deal with speakers and an Amp. It seems as if there is enough length to install most applications. Pos. and Neg. Cable included. Some connectors and zip ties. Includes in line fuse holder also. Copper seems adequately sized but somehow doesn't look "pure" to me.

By ROBERT on May 1, 2018

17 found this helpful


TruConnex TC4KIT-8B by Metra

The following review is for TC4KIT-8B, which is a part of the bundle you are viewing.

Nice set of wires that came along with my sub woofer. Heavy enough gauge, for the 450 Watts it gives out.

By Anonymous on May 31, 2018

14 found this helpful


Great kit for the price!

The following review is for TC4KIT-8B, which is a part of the bundle you are viewing.

Worked perfect for my amp. Good quality. Would buy again!

By Ryan on January 29, 2016

14 found this helpful


Actual 8 gauge wire

The following review is for TC4KIT-8B, which is a part of the bundle you are viewing.

For those that don't know, Truconnex wiring is a true 8 gauge wire (as well as their 10 and 4 gauge). It's not all rubber shielding with only 10 stands of wire inside like most eBay wiring sold out there.

By Sidejobsam on September 15, 2016

13 found this helpful


excellent product

The following review is for TC4KIT-8B, which is a part of the bundle you are viewing.

really nice for the price you cant go wrong and great quality

By Anonymous on August 3, 2018 Checkmark Icon Verified purchase

12 found this helpful


Great value

The following review is for TC4KIT-8B, which is a part of the bundle you are viewing.

Terrific product we are very happy with it will be buying it again...

By Shaila on April 18, 2018

12 found this helpful


good for smaller amps

The following review is for TC4KIT-8B, which is a part of the bundle you are viewing.

Pros: Good soft cables, easy connections and routing. All parts needed to install an amp
Cons: Short cables limit where you can install

By Robert of Edmonton on March 21, 2016 Checkmark Icon Verified purchase

12 found this helpful


was great

The following review is for TC4KIT-8B, which is a part of the bundle you are viewing.

I love this wire kit it was easy to use and great for the amp only thing mine was missing it fuse but other then that it was great

By Anonymous on September 25, 2019 Checkmark Icon Verified purchase

11 found this helpful


Good wire set

The following review is for TC4KIT-8B, which is a part of the bundle you are viewing.

This wireset came with the Cerwin Vega underseat subwoofer that I ordered through Sonic Electronix. It is perfect for that application, fits the unit wit no issues and wiring was a snap. It is CCA instead of OFC, but for this install that was not a concern.

By Anonymous on August 11, 2018 Checkmark Icon Verified purchase

11 found this helpful


TruConnex TC4KIT-8B by Metra

The following review is for TC4KIT-8B, which is a part of the bundle you are viewing.

nice package simple but don't come with RCA cables still would recommend

By Anonymous on July 20, 2018 Checkmark Icon Verified purchase

2 found this helpful


The following review is for TC4KIT-8B, which is a part of the bundle you are viewing.
By Wayne on January 23, 2026 Checkmark Icon Verified purchase

1 found this helpful


TruConnex TC4KIT-8B by Metra

The following review is for TC4KIT-8B, which is a part of the bundle you are viewing.

This kit comes with every thing needed to properly power your amp great value.

By Anonymous on May 31, 2018 Checkmark Icon Verified purchase

1 found this helpful


good stuff

The following review is for TC4KIT-8B, which is a part of the bundle you are viewing.

Quality product.Everything I needed would recommend to anyone.The guys at sonic are great.

By matthew on March 27, 2016 Checkmark Icon Verified purchase

1 found this helpful


Great set for a great price

The following review is for TC4KIT-8B, which is a part of the bundle you are viewing.

I would recommend this wiring kit to anyone doing a simple set up. Very straightforward to use and good quality wires!

By Avery on February 15, 2017 Checkmark Icon Verified purchase


Save up to 10 different vehicles in your garage
Vehicle
Store
Delete

2002 Saturn SL1

2005 Infiniti QX56

1992 Mazda RX-7

2009 BMW M3

2001 Audi S4

1987 Dodge Colt

1981 BMW 733i

2009 Dodge Dakota

1987 Ford B600

2024 Audi SQ8 e-tron

Vehicle
Store
Delete

2004 Harley Davidson FXDWG Dyna Wide Glide

Add vehicle Clear all vehicles
Where to find vehicle info
Are you sure you want to clear your garage?
This action cannot be undone. Confirm
This page was not designed for products.
If you continue, you will be redirected to a category customized for your vehicle. Continue
Loading...
Identify your vehicle and submodel details
  • Owner's manual
  • Vehicle's insurance card
  • Vehicle registration
  • Vehicle produced after 2005: Inside driver's side door
  • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
Car Info Side Door Icon
Vehicle Registration Icon
Vehicle Insurance Icon

Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

  • You see only parts engineered for your exact vehicle
  • You avoid incompatible radios, speakers, or wiring
  • Installation is smoother, faster, and frustration-free
  • You get the correct accessories the first time

Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.