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2015 Toyota Tundra TRD PRO - OEM Audio Plus System 400+

Kick Out the Jams

Feb 17, 2016
Photographers: Anthony Soos
One of the easiest and most noticeable upgrades for a recently purchased truck is to smack in a whopping sound system that shakes loose the fillings of anybody in a 50-foot radius. The choices are numerous. Many audio component makers are competing for the contents of your wallet, and in the end, it becomes a mix-and-match of different manufacturers supplying various components to create a complete system. Usually this mishmash goes together and all the different components end up playing nice while your neighbors invariably shout at you to turn it down. A small percentage of the time, an electrical snafu prevents all the pieces from joining together in noisy harmony and you spend days chasing down wires, checking plugs, and wondering if that odd smell is a burnt connection or your brain shorting out.
Did you ever wish you could just go to one place and pick out a giant box labeled “Stereo Upgrade” that contained all the high-watt goodies you craved, with wires cut to the correct length, pre-attached connectors, and painted brackets made for your specific model? You lucky Toyota owners can do just that. OEM Audio Plus, out of Anaheim, California, offers O+ kits with all the correct measurements and specifications approved by a team responsible for successfully delivering several platforms to other major automotive manufacturers. O+ kits use the factory head unit and come pre-tuned to optimize signal production and amplification. The programmable DSP achieves clean, clear, and crisp sound reproduction the moment the system is plugged in.
This go-around, we will be installing the OEM Audio Plus System 400+ specifically designed for our ’15 Tundra TRD PRO CrewMax. Follow along as we install the kit’s vehicle-specific amplifier, a duo of dash-mounted tweeters, a subwoofer with its own preformed box and amp, and all the wiring required to mate up to the factory head unit.
Photo 2/24   |   001 2015 Toyota Tundra TRD OEM Stereo Install
Our kit came off the shelf from OEM Audio Plus complete with an 8-inch subwoofer preinstalled into its own custom-made enclosure, with a powered amp and mounting brackets. Also included were two 1-inch soft dome tweeters, and pre-measured wiring looms with connectors for easy installation.
Photo 3/24   |   002 2015 Toyota Tundra TRD OEM Stereo Install
Our kit came off the shelf from OEM Audio Plus complete with an 8-inch subwoofer preinstalled into its own custom-made enclosure, with a powered amp and mounting brackets. Also included were two 1-inch soft dome tweeters, and pre-measured wiring looms with connectors for easy installation.
Photo 4/24   |   003 2015 Toyota Tundra TRD OEM Stereo Install
Using the same panel tool, we disengaged the lower instrument panel below the climate-control knobs. Next, we removed the whole panel with the knobs and set it aside in a safe place.
Photo 5/24   |   004 2015 Toyota Tundra TRD OEM Stereo Install
Four 10mm bolts held the radio in place. After we removed them, the radio slid out. We disconnected the antenna and the connectors and set the radio aside.
Photo 6/24   |   005 2015 Toyota Tundra TRD OEM Stereo Install
With the radio safe, we moved onto the Quick Sync Wiring Harness that will be routed on the passenger side. We removed the threshold and the kick panel under the dash just above the threshold.
Photo 7/24   |   006 2015 Toyota Tundra TRD OEM Stereo Install
We removed the passenger-side dashpanel—again with the panel tool—and pried off the panel. With the panel and threshold out of the way, we routed the OEM cable loom from the radio hole, through the passenger-side panel, and down into the cavity along the footwell.
Photo 8/24   |   007 2015 Toyota Tundra TRD OEM Stereo Install
To install the new subwoofer, we had to remove the front passenger seat and the four 14mm bolts holding it down. Once out of the way, we lifted up the carpet to access the factory amp and removed that as well.
Photo 9/24   |   008 2015 Toyota Tundra TRD OEM Stereo Install
Each amplifier is pre-checked for quality and loaded with software from O+ to properly align the factory head unit with the sub and the amp.
Photo 10/24   |   009 2015 Toyota Tundra TRD OEM Stereo Install
In place of the factory amp, we installed the O+ 360 watt, 2ohm, multichannel, 32-bit power amp. We bolted it in to the factory mounting locations, plugged in the power supply and made sure to install the ground cable.
Photo 11/24   |   010 2015 Toyota Tundra TRD OEM Stereo Install
With the dash still disassembled, we decided to install the kit’s 1-inch soft dome tweeters. We popped out the two 10mm bolts holding each side in, removed the factory tweeters, and dropped in the new ones. No wires to route here; they used the factory connectors.
Photo 12/24   |   011 2015 Toyota Tundra TRD OEM Stereo Install
In order to mount the rear subwoofer and custom enclosure, the rear driver’s seat had to be removed, this time with a 17mm socket, to access the rear panel.
Photo 13/24   |   012 2015 Toyota Tundra TRD OEM Stereo Install
Toyota anticipates its buyers may upgrade the stereo system and provides mounting points for the sub we were about to install. We just felt for the mounting point closer to the driver’s side, made a few quick cuts with a razor, and it popped through.
Photo 14/24   |   013 2015 Toyota Tundra TRD OEM Stereo Install
The sub box use the dead space behind the rear seat and fits in perfectly. We routed the power-supply cable loom, much in the same way we routed the amp loom, and installed it into the same area under the front and rear passenger threshold. Next, they routed behind the rear seat to mate up with the amp. And as you can see, it’s measured just perfectly.
Photo 15/24   |   014 2015 Toyota Tundra TRD OEM Stereo Install
With the amp all plugged in, we bolted it down, and just like with the loom, the brackets lined up exactly where they need to go.
Photo 16/24   |   015 2015 Toyota Tundra TRD OEM Stereo Install
We bolted the rear seat back in, using the factory mounting hardware we had just removed earlier.
Photo 17/24   |   016 2015 Toyota Tundra TRD OEM Stereo Install
Next up, bolt in the front passenger seat, noting the amp has plenty of breathing room under the seat, and will not hinder its back-and-forth movement.
Photo 18/24   |   017 2015 Toyota Tundra TRD OEM Stereo Install
To give this whole integrated system the power it needs to perform, we removed the driver’s side threshold and kick panel, routed the wire above the accelerator pedal and steering column, and used the provided cable ties to secure them loosely for now.
Photo 19/24   |   018 2015 Toyota Tundra TRD OEM Stereo Install
We popped the main power wire through the passenger compartment to the engine bay by slipping it through the factory wiring harness grommet on the firewall and pulled the full length of wire through.
Photo 20/24   |   019 2015 Toyota Tundra TRD OEM Stereo Install
We slipped on the corrugated split loom that protects and insulates the dual power wires and connected them to supplied fuse holder assembly using a wire stripper and crimper.
Photo 21/24   |   020 2015 Toyota Tundra TRD OEM Stereo Install
Once the power wire and the fuse assembly were crimped down, we blasted them with a heat gun to ensure the crimper was good and tightly melted around the connections.
Photo 22/24   |   021 2015 Toyota Tundra TRD OEM Stereo Install
We used a 10mm wrench to remove the bolt off of the side of the positive terminal and installed the ring connector of the power supply and fuse holder to the terminal. The negative side of the battery was still disconnected and the fuses out of their holders.
Photo 23/24   |   022 2015 Toyota Tundra TRD OEM Stereo Install
With everything where it should be, we tightened the zip ties on the power wire, re-installed the driver’s panels, and plugged the new connectors into the rear of the radio, before installing it and reassembling the center console. Finally, we plugged in the fuses and popped the negative cable back onto the battery, and we were ready to go!
Photo 24/24   |   023 2015 Toyota Tundra TRD OEM Stereo Install
We were already at OEM headquarters and installation center, the guys were kind enough to show Truckin how they calibrate their systems using this multi-mic system. They pre-calibrate the sound levels to ensure top-quality sound right out of the box in a true, plug and play system.

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