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Welcome to our new Site We are adding some final touches. For other T-harnesses Options please visit Thank you
Welcome to our new Site We are adding some final touches. For other T-harnesses Options please visit Thank you

Frequency restoration in real time

Cadillac AKG T-harness 2021-2025 R2R

  • 100% Hand Made in house
  • BassRESTOR will come pre-wired
  • 24-25" inch harness length
  • 100% copper USA made wire
  • Vehicle factory OEM connector fitment
  • TESA tape base finish with abrasive resistant loom.
  • Shock-Wire© EMI blocking twisted speaker wire
  • Wire Ferrule termination
  • 5 year warranty
  • Originally designed & made in the USA
  • Signal-left/right, power, ground
Original price $240.00 USD - Original price $240.00 USD
Original price
$240.00 USD
$240.00 USD - $240.00 USD
Current price $240.00 USD

Additional options & Tuning Info

Looking for less features or just the Harness? (Click here)

The BassRESTOR is an advanced audio processor and requires some know how to set and configure correctly. (Tuning PDF)

in stock, ready to be shipped


  • CADILLAC | 2015-2019 | ATS | With Bose
  • CADILLAC | 2017-2023 | CT6 | With Bose
  • CADILLAC | 2016-202 | XT6 | With Bose
  • CADILLAC | 2016-2024 | XT5 | With Bose
  • CADILLAC | 2019-2024 | XT4 | With Bose
  • CADILLAC | 2020-2022 | CT5V | With Bose
  • CADILLAC | 2019-2014 | CT5 | With Bose
  • CADILLAC | 2019-2024 | CT4V | With Bose
  • CADILLAC | 2019-2014 | CT4 | With Bose
  • CADILLAC | 2024 | LYRIQ | With Bose
  • CADILLAC | 2015-2024 | ESCALADE | With Bose

At factory Bose amp


  • Front under center console
  • Driver side rear quarter panel

LLJ Elite System Installation Manual

Color Code Card & Bass Roll-off info


  • The 32 speaker AKG is an A-B configuration with 2 amplifiers for the Escalade
  • Some Bose amps have a GRAY connector instead of a BLACK connector. This harness will still work with your gray connector. It will have an offset tab, we will cut one of the tabs on our harness to fit your vehicle. If your harness has both side tabs please note the LEFT tab needs to be trimmed. 
  • Harness ordered will have the LOC/Processor pre wired and it will includes a remote turn on cable. 
  • Chimes will not be affected.

High end equipment needs a quality signal

I was told the epicenter is better is that true ?

ALL units have draw backs exempt the BassRESTOR. One unit being better then another is objective to the project and the expertise of the installer.

  • The fact is the Epicenter is obsolete not just do to lack of features and abilities but because the price alone for what you get.
  • The epicenter micro was developed after the BassRESTOR because well the BassRESTOR is everything you need in one unit and selling a device that also needed an LOC was just not ideal and it still lacks do to lack of innovation and tunability.
  1. The Micro uses the same algorithmic form that the original epicenter used it requires that the signal meet a specific loss in audio and DB to engage and that means your tunning can affected and bass may seem less in songs that don't meet the pre sets.
  2. Load detection is a must in 2023 so having to switch around till you get it right is just ..why ?
  3. Audio sampling just the low end of the recording is great if you want minimal audio restoration and that's what you get.
  4. Voltage output pre sets. The Epicenter micro manual instructs you to set the output based on the sub size. That is completely wrong and one has nothing to do with the other.

  • IN conclusion the BassRESTOR is an all in one Dynamic restoration LOC that is also a line driver and that means you don't even need the gain on your amplifier to maximize its output to the sub.
  • The real time analyzation of the FULL audio input from the sources unit allows it to properly and accurately restore and missing or attenuated frequency in the recording.
  1. Unlike the Epicenter micro the potentiometers on the BassRESTOR: (WIDE,FREQ,EFFECT) allow you to not just select the effected range of DB repair but also let you Boost the attenuation in that audio to gain thing like audio clarity, regain audile strength in the audio and other key features.
  2. Auto load detection is another most have along with the built in gain you can set it to the needs of the amplifier input to maximize the output to the subwoofer.
  3. The Multi function RLC controller is another great feature that allows control of not just the output voltage but the effect in real time and even turning off the effect for song that have to much bass. ( if that's even a thing).

Most import is price for product:

  • BassRESTOR w/RLC:$198.99
  • BassRESTOR R2R:$240.00
  • Epicenter micro:$249.99
What is a subsonic filter used for ?

This is a filter that limits the low end of the frequency rang passed on to the amp or the amp to the sub. The human ear can only audibly hear down to 20hz but y can feel frequency below that.

  • The majority of subwoofers do not play near that range of frequency and trying to will create heat and distortion. Thus damaging your subwoofer and amplifier.
  • Setting your SUB sonic filter to the lowest frequency your sub can play is a great place to be.
I listen to a lot of old school rock or Banda, Is this a good option and why ?

This would be the best option not just for frequency restoration but for tuning and accuracy.

What is Frequency response ?

This is the playable frequency range of a products. The rang of frequencies it can play and or process through.


Factory signal Analyzation

Factory signal Analyzation

This illustration shows what the factory signal could look like when it has bass roll off. This is an attenuation in the audio signal that the radio outputs to prevent damage to the factory speakers that are not designed to play in this frequency range AT specific volume levels.

The BassRESTOR analyses the FULL frequency range that its fed and in real time adds back in any missing frequency. An even cooler feature is that is can do the same restoration with just a small fraction of the Low ends audio signal.


Resurrecting your signal

Resurrecting your signal

By correcting any deficiency in your audio you optimize and maximize the performance of your mono amplifier and thus your subwoofers output.

As shown by the graph the audio signal that was rolled off at 60hz and none existing after 40hz. Has now been fully restored. by then using the EFFECT you can boost the signal from -5db to +1db. Here are a few benefits to that:

  1. Audibility: Increase in DB may make sounds more audible, particularly if they were previously too quiet. This is beneficial for music mixing or mastering to ensure all elements are heard clearly.
  2. Impact: Increasing the volume by +6 dB can add impact or emphasis to certain sounds or parts of a recording, enhancing the overall listening experience.
  3. Clarity: Boosting the selected frequencies by +2-6 dB can enhance clarity, making it easier to discern individual elements within a the audio.
  4. Compensation: In some cases, a +2-6 dB increase may be used to compensate for losses in volume caused by equipment or transmission limitations in the vehicles equipment of source.
  5. Subjectivity: The perceived difference between +1 dB and -5 dB can also depend on individual perception and the specific characteristics of the audio content. In some situations, a subtle increase (+2 dB) might be preferred over a slight decrease (-3 dB) for maintaining the intended balance or impact of the sound.

WE only carry the best not the rest!


In a competition heavy industry. selling a quality product at an affordable price is something few companies will do. while Most just sell the same product rebranded and without innovation companies like Wavtech have found a balance to over deliver and under charge!


Staying ahead of the rest while providing solutions you can depend on is an achievement on it own. Manny try to imitate them but fall short every time and try to chare more.