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Project Over-Under: Part One, Audiotistics Brings technology and Bass to Our Standard Cab Silverado

Project Over-Under: Part One

Apr 9, 2018
Photographers: Jeremy Cook
In the editorial the last couple of months, we introduced our latest “beat to neat” Project Over-Under. It’s always a tough decision when it comes to what to start with when you begin a build, but since we are in the midst of our annual 12-volt issue, we decided we would work on this truck from the inside out, beginning with the security and audio. The idea of adding an alarm was to simply add door lock solenoids so the truck would have keyless entry, but we went with a Viper setup that offered a whole lot more than that.
On the audio side, we really just wanted to update the truck—and maybe get a little bass behind the seat. After all, this was intended to be the “basic” build for this issue. But, as usual, things snowballed a bit, and we ended up with a pretty nice system. Credit goes to Tim Wepprecht and his crew at Audiotistics in Victorville, California. Not only did they knock out the install in just a day, but they took our simple, behind-the-seat sub box idea and transformed it into a fully upholstered sub enclosure and amp rack. Audiotistics is also a top builder and installer of all things audio and an authorized dealer for all of the manufacturers we used in the build, including JL Audio for our amp, subwoofer, and component speakers, as well as the JVC Digital Media Receiver and the Viper Remote Entry and Security system. Check out all the manufacturers’ websites to see what you can do for your truck’s audio as well as the Audiotistics website to see all of its custom builds. Finally, check back here at Truckin to see how Project Over-Under evolves.
Photo 2/37   |   Project Over Under Part One Before
Photo 3/37   |   Project Over Under Part One After
Photo 4/37   |   Our ’03 Chevy Silverado, dubbed Project Over-Under, is the subject of this audio and alarm install as part of our annual 12-volt issue. It’s also the first installment of many for the truck itself. Since we were stripping most of the interior for the audio and alarm, we took the opportunity to give the interior parts a deep cleaning, and there will be several more interior upgrades in the months to come.
Photo 5/37   |   The heart of the install is this JVC double-DIN AV KW-M740BT multimedia receiver. It features a 6.8-inch Clear Resistive Touch Monitor, Apple CarPlay, Android Auto, Waze, WebLink, High-Resolution Audio, iDataLink Maestro Ready, Bluetooth, 13-Band EQ, and even an app to run the whole thing from your smartphone.
Photo 6/37   |   Audiotistics, in Victorville, California, is a huge dealer for Viper, whose line of security and remote-start items lets you build out your system with the features you want. We went with the Smart Start app and two-way LCD remote and added door locks for our stripped-down model doors. JL Audio C1-525 and C1-650 separates will fill the four stock locations in the standard cab truck.
Photo 7/37   |   One JL Audio RD900/5 Class D amplifier will take care of the power. It will provide 70 watts to each separate and 500 watts to the sub. We matched it up with a top-quality JL Audio installation kit and a trio of connector cables.
Photo 8/37   |   Last but certainly not least is the JL Audio 13TW5v2 13-inch shallow-mount subwoofer. The unique chassis allows it to only need 2.6 inches, and the ideal volume for a sealed Box is .80 cubic feet, so that is what the crew at Audiotistics built.
Photo 9/37   |   The Audiotistics master installers, consisting of Wes Evans, Andy Cardenas, and Andrew Schnelle, wasted no time stripping the interior and removing the old components. In this shot, the dash bezel was popped off and the old single-DIN head unit was removed.
Photo 10/37   |   The door panels were pulled, as were the lower dash panel and side caps, doorsills, and kick panels. There will soon be a lot of work happening here to connect the state-of-the-art Viper security system.
Photo 11/37   |   Elsewhere in the cab, the seats were removed, as was the back panel, and the side panels were next.
Photo 12/37   |   With the factory rear speakers removed and tossed, we were ready to begin running wire for the new system.
Photo 13/37   |   We started under the hood by running the fused power wire to the battery, as well as a constant power and ground for the alarm.
Photo 14/37   |   While we were under the hood, the siren was mounted up under the fender support and all of our wires were fed through the firewall.
Photo 15/37   |   Back in the cab, the crew was making quick work of running all the wiring. The connector cables run from the head unit through the dash and kick panel back to the amp. The speaker wires follow suit.
Photo 16/37   |   The main module of the Viper system will be located under the dash and has several wires that need to be sorted and connected.
Photo 17/37   |   We can’t even begin to follow the complete wiring up of the Viper system, but it involves tapping into several wires under the column (as seen here) and is best left to the professionals. The Audiotistics guys knocked it out in about an hour.
Photo 18/37   |   The doors were wired up for the door lock solenoids and JL 6.5 components. Every connection was soldered instead of using connectors, ensuring a top-quality install.
Photo 19/37   |   Since 5.25-inch speakers would be replacing the factory 4x6s many companies have stopped producing, we fabbed up a set of “adapters” using two layers of ¼-inch MDF cut out on the table router.
Photo 20/37   |   The new piece was painted and installed, and the JL Audio speakers were screwed into place.
Photo 21/37   |   Then the front doors were built out with the new 6.5-inch speakers and the door lock solenoids.
Photo 22/37   |   The tweeters were cut and set into the A-pillar plastics. It’s a great way to get the highs up where you can hear them.
Photo 23/37   |   Finally, the crossovers were located behind the side panels on the ends of the dash.
Photo 24/37   |   Then we began the final connection of the JVC head unit. With the installation kit, this part of our install was as plug and play as it gets.
Photo 25/37   |   Soon, we slid the JVC unit into place and powered it up. But we still have a long way to go before we get to the tuning.
Photo 26/37   |   While we were wrapping up the rest of the truck, the Audiotistics crew was already busting out the custom box. We told owner Tim Wepprecht that a pre-fab box would be fine, but, as you’ll see, he had other ideas for our Silverado project.
Photo 27/37   |   We checked the fitment of the box itself before moving on to the amp rack.
Photo 28/37   |   The amp and amp rack will take up the remainder of the cab wall and will sit flush with the sub box once complete.
Photo 29/37   |   After a few minutes of computer design, Tim used the laser cutter to make up the front panel. What you see here is actually the main panel and the insert panels being cut at the same time with a ¼-inch gap in between for upholstery.
Photo 30/37   |   With the amp rack completed and the front of the box painted up, a couple of small brackets will hold the box in place.
Photo 31/37   |   The covers were set in place for final fitment before they were upholstered.
Photo 32/37   |   We also wired up the amp at this time and mounted it for the last time.
Photo 33/37   |   Here’s the final cover just prior to upholstery. As you can see, the Audiotistics crew even added an angled top section.
Photo 34/37   |   We chose some simple black carpet to wrap up our outer piece.
Photo 35/37   |   We wrapped the inserts in black vinyl and gave them one last test fit before installing them in the truck.
Photo 36/37   |   Here’s the final product all buttoned up. The Audiotistics crew really went above and beyond to deliver a killer product.
Photo 37/37   |   All that was left to do now was to tune the amp and the head unit and add both the Viper and JVC apps to our smartphone. The overall sound and bass we got out of this setup is pretty incredible. And this is just the beginning for Project Over-Under, so stay tuned!


JL Audio
Miramar, FL
Wayne, NJ 07470
Apple Valley, CA 92307