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Features built in to our OG 2.0

Built in Load Resistance for Ford, Ram, and GM. Independent power for your amplifier and LOC. 5 year warranty

An Expanding system

Our one of a kind systems don't just work great, they make you feel great! Knowing you're purchasing a product that can be used again with the simplicity of a Base Connector change, means you can invest once and get your moneys worth! Not to mention the quality of our hand-crafted kits give you and experience you can feel and hear!

The Original!

The first of its kind. Our GX500 kit aimed to fill in the gap that big industries simply ignored, and that was the customer that wanted just enough to make it sound great. Yes some companies made "factory upgrade kits" but none had the ability to add any aftermarket mono amp and that's what the people wanted so we delivered!

Wāvtech Tech

Its like the secret sauce but better 😄. Knowing our customers will receive a product they will be proud of, drives us to partner with the best. If our product will outlast your car, so should the products that go along! We want you back every 5 years not every 3 weeks 😉 Quality doesn't mean expensive!

The Kicker Key 200.4

  • 200 Watts Of Power (50x4)
  • Auto EQ Microphone With Selector Switch Included
  • Compatible with Start/Stop Vehicle Technology
  • FIT2™ Technology Included
  • Turn On Via Remote 12v Signal Or DC Offset
  • Auto 40-Band Equalizer
  • Bi-Amp Capability (Defeatable)
  • Auto Compressor (Defeatable)
  • Kicker EQ Preset (Defeatable)
  • Auto Time Alignment (Defeatable)
  • Auto Level Adjustment (Bi-Amp Mode Only)
  • Auto Speaker Size Detection
  • 24dB Crossovers
  • 60/80/120hz High Pass Filter (Defeatable)

Option A : ART

  • +12V Output Generation
  • Capable of Driving Multiple Relays Simultaneously
  • 1.5A Continuous Output Current
  • Independently Select DC Offset or Audio Detect, or Use Both Simultaneously

Option A : LinkDQ

Over the past 5 years the LinkDQ has proven to be more reliable and cost effective for our customers than other brands. This option lets you add any existing or new subwoofer amplifier you may have or need to fit your project.

Option A : Link500.1mini

This Wavtech line of amplifiers come loaded with the same features as their LOC units. This means you can go direct into the amplifier and use the built in Parametric EQ to repair and enhance any missing bass.

This lets you narrow down on the preferred frequency (based on your sub and box tunning) and
add up to 12db to repair or boost any missing low bass frequencies your vehicle may lower at higher volumes. The amp comes with a ton of other options so please take a moment to look them over.

link500.1mini Features

  • 500 Watt Mono Amplifier
  • 300 watts x 1 @ 4 ohms
  • 500 watts x 1 @ 2 ohms
  • Start/Stop System Compatible
  • Differential Balanced Inputs
  • Variable Gain Adjustment w/Clip LED
  • Auto Turn-On via DC-Offset or Audio Signal Detect
  • OEM Load Detect Compatible

link500.1mini Specifications

  • Input Sensitivity
  • Max Input Voltage (SPK) ------ 40V RMS
  • Frequency Response ----------- <20Hz to >20kHz
  • THD+N ------------------------------- <1%
  • S/N ------------------------------------- >78dBA (1W, 4ohms)

The LinkDQ

The best LOC you can get is one that offers the features you NEED at a price that makes sense for what you get. Hands down the best LOC on the market is the LinkDQ from Wavtech! This magic box has everything an LOC should be with the features that matter like:

  • Adjustable Parametric EQ
  • Differential Balanced Inputs
  • Low Impedance Outputs
  • Variable Gain Adjustment w/Clip LED
  • Auto Turn-On via DC-Offset or Audio Signal Detect
  • Generated +12V Remote Output
  • OEM Load Detect Compatible
  • Locking Detachable Power/Speaker Terminals
  • Professional Grade Panel Mount RCA’s
  • Compact Aluminum Chassis w/Detachable Mounting Tabs

linkDQ Specifications

  • Output Voltage (Max)--------- >10Vrms
  • Output Impedance ------------- <50Ω
  • Input Sensitivity
  • Max Input Voltage (SPK) ------ 40Vrms
  • Frequency Response ----------- <10Hz to > 100kHz
  • THD+N (SPK/RCA) --------------- <0.04% / <0.04%
  • S/N (SPK/RCA) -------------------- >115dBA / >116dBA
  • Parametric EQ (Boost/Freq) 0 to +12dB / 30-80Hz
  • Turn-On Trigger ------------------ +12V, DC-offset & Audio Detect
  • Generated +12V Output ------ >500mA
  • Chassis Dimensions ------------- 1.1”x2.9”x3.5” (29x75x89.5mm)

Double 16 Awg Twisted Power 20' Foot power kit

This power kit is made out of our Shock-Wire 300 volt, twisted power wire.

Kicker Key GX500 Elite S.I.K Audio Harness Kit

Parts in stock!

Starting at :

$799.75 USD
This product is only available through our Custom Elite Harness Builder Program. (CEHBP)
Text or schedule a call: 602-320-7004

At LLJ Customs we aim to make out T-Harness and Loopback Harness as multi-purpose as possible. That is why we invented the Elite Harness System. This system allows you to add all levels of audio upgrades to your factory system. That has never been and still is not possible, with any other product on the market. Unless, of course, you are willing to re-buy unnecessary parts when you change your vehicle. With that being said our Elite System allows you to scale your system, based on your current needs. This means you do not need to invest a ton of money, without gaining the experience. That is why we created additions like the GX500 and FS1000 SIK Kits. Taking the guess work out of the equation by pairing our industry leading harness platform with industry leading equipment such as the Kicker Key. 




The Kicker Key is a smart, self tuning DSP/Amplifier. By placing the included microphone where you would like the acoustic energy directed, you can have a great sounding system installed in minutes. Our harnesses have built in load resistors to make sure they meet all factory requirements. The harness design also includes an Auto Turn On trigger, the ART, that uses the AC voltage in the factory speaker, audio signal to turn on and off the harness. Along with that remote, we offer an accessory remote leg (output wire) that is good up to 1.5 amps of draw. You can use this to power accessories such as LED strips, other amps, etc. 


Our harness uses our twisted pair, electro-magnetic blocking ShockWire. You also have the option to add a 2 channel LOC (the LinkDQ) for adding your existing or new, subwoofer amplifier. We offer our Kicker power kit, this is a double twisted 16awg for power and ground, to mirror the Kicker Key factory harness. Comes loomed and pre-terminated with an iP 67 rated, quick release Dutch Connector. 

The kit does NOT come with a Base Connector included. Please be sure to add the correct Base Connector to your order. 


Kits are pre-made, add-on options take about a week to add, and run through testing for 48 hours before they're sent to shipping. 


Installation Video YouTube

How your signal is delivered Matters!

Audiophile quality signal built, with the highest quality materials at the best price! Zero to no resistance means less heat and a better signal.

What Is High Level or Low level?

High level : AKA Speaker level is an amp that can handle an input voltage of 8-40v. This high output is common in factory amplified vehicles or where the
max voltage of a head unit is more than 10v. This is normally identified by a pigtail connection point or via the RCA on the amplifier (must check user manual to verify.) Some amps have a switch for this. NOT all amps have this feature.

Low Level : is 0-8v of signal voltage. This is most commonly found in aftermarket head units or other aftermarket units that use can-bus. Most passive LOC units output 0-5v so they are considered a low level and are normally RCA to RCA. Modern day ACTIVE LOC units can output 0-10v of signal.

In conclusion an LOC works as an in-line filter, that lets you control the signal, its intensity and in some cases the playable frequency range.

If your amp takes a high level and it is within the vehicles factory output range, then you dont need an LOC unit and can wire in and out of your amp
directly. In some Fords the signal can be flattened at the OB2 furthering the simplification of the installation.

Are you In Phoenix,AZ? So are we.

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