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Hertz-Audison Full System Plug and Play Installation Guide '24-Current JL Wrangler/ '24-Current JT Gladiator
The following guide will walk you through the entire installation which includes a step by step catalog. Our installation video is in the works but this guide will get you over the finish line in the meantime.
If you have any questions, or need anything during the installation, we're only a phone call away. We're available Monday-Friday, 9am-5pm est. for any support needed, or you can shoot us an email at support@trailseven.com.
These installation notes are intended to be used in conjunction with the installation videos based on the your bundle.
Tech Tips
Tools You Will Need for Speaker Install:
- Panel Removal Tool
- 7mm Socket
- 10mm Socket
- Zip Ties
- 90 Degree Socket Drill
- Phillips Screwdriver
- T-20 Torx Bit
- T-25 Torx Bit
Tools You Will Need for Amplifier Install:
- Panel Removal Tool
- 7mm Socket
- 10mm Socket
- Zip Ties
- Allen Key Set
- Phillips Screwdriver
- Wire Snips
- Retractable Magnet Stick
- T-50 Torx Socket (for seat removal)
- Small Flathead Screwdriver
SECTION 1 - Speaker Upgrade:
Pre-Install Read
Install Audison speakers in dash, knee pods, and sound bar. Work carefully, secure wiring, and consider professional help if needed.
SECTION 1: Dash Speaker Upgrade
- Remove Center Dash Trim & Speakers: Remove 7mm/Phillips screws, detach trim and grilles with panel tool, and disconnect speakers.
- Remove Head Unit Screen & Trim: Remove 7mm screws, pull screen and trim (clipped), and disconnect.
SECTION 2: Driver Side Knee Pod
- Disassemble Dash: Remove side panel, 7mm/10mm screws/bolts, steering panel, and light module with panel tool.
- Install Knee Pod & Tweeter: Replace stock pod with MB Quart pod, route tweeter wire, and mount tweeter with 7mm screws.
SECTION 3: Passenger Side Knee Pod
- Disassemble Dash: Remove glove box, side panel, and 7mm screws/bolts.
- Install Knee Pod & Tweeter: Replace stock pod, route tweeter wire, and mount tweeter.
SECTION 4: Sound Bar Speakers
- Remove Grille & Speakers: Remove T-25/T-20 Torx bolts and disconnect factory speakers.
- Install New Speakers: Mount new midrange speakers with brackets and reinstall grilles.
Notes
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Avoid bending trim; tape excess wiring.
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Speaker Installation Guide: LINK
Speaker Bundle Installation and set up video!
Section 2 - Amplifier Installation:
This guide will walk you through installing a 5-ch amplifier setup in your Jeep Wrangler JL or Gladiator JT.
Step 1: Remove Driver seat
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Use an T50 Torx to remove the four seat bolts. (Remove seat belt as well if needed_
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Tilt or fully remove both seats for easier access.
Step 2: Route Power and Ground Wires
- Power Wire: Route the power wire from the battery through the firewall (driver-side footwell).
Ground Wires:
- 5-Channel Amp Ground: Use the factory ground point under the driver seat (near the transmission tunnel).
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Secure all ground connections tightly to avoid noise issues.
Step 3: Remove Radio & Access Signal Wiring
Factory Radio Installation (Using PAC Module)
If connecting to the factory radio, install the PAC AP4-CH42 module behind the glove box. Use the provided T-harness to connect the PAC module to the radio harness. If your Jeep isn’t factory amplified, make sure DIP switch #4 is DOWN (On Position) on the PAC module.
With Audison specific amplifiers, as shown on the video, the REM/"Trigger Wire" or blue wire would be plugged into the red wire of the REM pig tail coming from the Audison amplifiier
- Connecting the 9-wire harness:
- Connect the "bare-ends" or Ferrules to the Amp to the corresponding wires and channels
- Connect the PAC proprietary plug into the T harness of the PAC AP4-CH41 that located behind the head unit.
- Connecting the Bypass harness:
- Connect the "bare-ends" or Ferrules to the Amp to the corresponding wires and channels
- Unplug the harness plugs from your OEM amplifier, located behind the OBD2 port under the steering wheel, and connect the matching plugs from the Bypass harness to the plugs you removed from the Amplifier (there is one plug you will leave in the amplifier, due to canbus validation for the Jeep.
- Connect the blue remote turn-on wire from the PAC module to the blue amp remote wire (pre-terminated with a bullet connector).
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Run RCA cables from the PAC module to both amplifiers:
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RCA's from PAC → routed to the 5-channel amp under the driver seat.
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Amplifier Speaker Wires:
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Front speakers → Channels 1 & 2
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Rear speakers → Channels 3 & 4
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All speaker wires are pre-terminated ferrule connectors make wiring easy.
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RCA Connections:
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Front & Rear RCA cables from PAC module or radio.
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Step 4: Adjust Amplifier Settings
5-Channel Amp Settings:
- Amp Mode: 5 Channel or pushed out
- Input: On or pushed in
- Level: *NOTICE: Do not use the picture as reference for the gains!* Set gain to 0 and radio levels to 0. Gradually increase volume to 75% max. For Channel 1, increase gain slowly until slight distortion is noticed, then lower gain slightly. Follow the same method for the remaining channels. Use radio settings for “salt and pepper” adjustments. Every Jeep's gains are different.
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Hi Pass: ~80 hz or 8 o'clock
- Mode: Switch to Hi or middle
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Lo Pass: ~100 hz or 9:30 o'clock
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Boost: NOTICE: Do not use the picture as reference for the boost! This level is to artificially give you more bass frequencies within more acoustic style of music, in a perfect set up boost should be set to zero, however in very specific genres and vehicles, there are times where "bass boost" could be used as shown in our picture.
- Subsonic: On or pushed in
- Mode: High or pushed in
- Range: x1 or pushed out
- Hi Pass: ~80 hz or 8 o'clock
- ART: On or pushed in
- Input: On or pushed in
Here are pictures of the amp settings we set our systems
to give a good foundation to work from.
Installation and set up video!