Welcome to your Full Audison Voce II Forza Audio System Upgrade for your B&O Bronco!

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.

• Disassembly - Install video below and Installation Guide PDF
• Tail Gate Enclosure Install - Video below
• Rear Speaker Pod Install - Video below
• System Installation - Video below and Installation Guide PDF

Tech Tips

Tools You Will Need:

• Panel Removal Tool
• T-20 Torx
• T-30 Torx
• 7mm Socket
• 8mm Socket
• 10mm Socket
• 10mm Box Wrench (Ratcheting Preferred)
• Phillips Head Drill
• Small Flat Head Screwdriver
• Alcohol & Microfiber Towel
• Allen Key Set

Section 1: Disassembly

You can follow the guide for the disassembly process. Working from the dash to the rear pods, from there you can then move to the trunk to remove the subwoofer enclosure to make way for the new full system. Then move to the ACM/Radio for the speaker harnessing.  The 

Installation Guide: LINK

Section 2: Cable Routing and Connections:

Step 1-Running Power Cable: Since the door thresholds, A,B,C pillars, and back floor panel removed, you can route the power wire through the Bronco, from the trunk, through the fire wall and landing onto the battery. Leave enough slack for the amp, but start from the passenger side trunk where the subwoofer enclosure was, then route the power cable up to the rear seat across the seat ( to be placed under the previously mentioned back floor panel). Then through the Driver side panel to run the cable down through the Driver door threshold, B pillar, and front door threshold. from there you can run the cable up to the fire wall to pass through the mentioned grommet to pass through the firewall to make it to the Fuse Bracket which will be mounted and routed to the battery. 

Step 2-Routing 9-Wire/Kicker Speaker Wire/DRC cable: After the power cable has been routed, following the similar principal or running through the pillars and thresholds, you can run your other harnessing to the speaker and throughout the dash. You will split both the harnessing down the driver and passenger side. The bass knob and passenger side kick Speaker Harness will run down the passenger side, leaving the kick speaker wire in the floor to connect to the kick panel area, then running your bass knob up behind and across the dash. The driver side will have the 9 wire and the driver side kick speaker harness. 

Please Note: The kick Speaker Harness will clearly label the Passenger side and Driver side to help route.

Step 3-Amp System Installation: On the back of the amp system and boar, you will see the power distribution block, this is where you will land the power wire, using a 5mm Allen key to loose, land, and tighten the power wire into the distro-block. from there you will want plug the kick speaker harness into it's proprietary orange faced plug and mount the ground wire and amp board into the previous sub enclosure location. 

Step 4-Speaker and Harnessing Orientation: In short, you have to add an extra speaker connect to make the system to work,  now that you routed the kick speaker harness, you now want to move your speaker harnessing up the dash, using our harnessing and looking through our install guide and videos, you should be able to get through the install. You will have the kick speaker harness plugged into the 6.5" speakers. Then you have the 3" woofer harness that will plug into the OEM kick panel speaker plug, then route to the top into the dash speaker mount. Then use your grille mounted tweeter will plug unto the factory dash plug.  

Step 5-Center Dash Speaker Connection: Within the T harness that will connect to the ACM/radio, you will see a speaker wire lead with spade connector ends, this will need to be ran to the dash 3" woofer speaker from the radio. While adding that T harness, you can complete the plugs into the 9 wire that was previously ran from trunk/amp system location.

Step 6-DRC Module Installation: After reinstalling the Temperature control panel and all harnessing, speakers, and panels have been plugged in, mounted, and finished, you can finish routing the "bass knob" harness that was routed towards the center of the dash, landing the harness under the temperature control into the cubby area of the center console. from there you will dissemble the bronco 

Section 3: Rear Speaker Pod Install (see video below)

Speakers will come fully loaded in our Trail Seven pods which are lined with sound deadening and filled with poly fill for optimal speaker performance.

 Trail Seven Tailgate Subwoofer Enclosure Installation Video

Section 4: Digital Remote Control Module

Main View:

• VOL: Allows for a +6.0 DB increase in volume.  We recommend micro adjustments only above 0.0.
• SUB: Allows for a decrease in bass DB.
• BAL: Balance Left and Right
• FAD: Fade Front and Rear
• MENU: Bottom left button.  Press to access the tuning and control adjustments.
• FINAL TUNE: Press the knob down to access and adjust Final Tune “ON” or “OFF”.
  • NOTE: when selecting Final Tune, the system will increase 3.0 DB across all frequencies, it’s recommended to reduce the radio volume prior to turning “ON” Final Tune to avoid clipping.  The system will intermittently shut down, and the DRC module will flash a warning if the settings are too high.  Simply reduce the volume on the DRC module or on the radio and the system will restore when it is cooled.
  • Press menu button to exit Final Tune section
• Presets:
  • To access the presets, press down on the DRC knob which will display 1-3 of 6 presets, pan right for 4-6 of 6.
    • 1- Accordo (Audison software)- Time aligned
    • 2- Accordo (Audison software)- same as above, not time aligned
    • 3- Bass- Bass is elevated
    • 4- Rock- Rock enthusiasm
    • 5- Top Off- Louder across system
      • Recommended to turn Final Tune “ON” when selecting Preset 5 (Note to lower radio volume prior to toggling Final Tune “ON”.
    • 6- Accordo (Audison software)- Time aligned, similar to #1 with a slightly different crossover adjustment for the tweeters. 

SECTION 5: Tailgate Subwoofer Enclosure (see video below)