Alpine PSU-300TCM
Powered System Upgrade for select 2016-up Toyota Tacoma Double Cab without factory premium sound
GENERAL FEATURES:
factory audio system upgrade
fits select 2016-up Toyota Tacoma Double Cab without factory premium sound
Alpine KTP-445U Power Pack 4-channel amplifier
45 watts RMS x 4 at 2 or 4 ohms
Alpine PWE-S8 compact powered subwoofer
8" woofer
120 watts RMS amplifier
vehicle-specific bracket holds sub and amp under left rear passenger seat
vehicle-specific wiring pre-cut and terminated
warranty: 3 years
Fix your factory sound
The top two complaints about the way a car's factory system sounds are that there's not enough volume and there's not enough bass. Alpine's PSU-300TCM Powered System Upgrade solves both of these issues in your Toyota Tacoma with a neat and clever combination of products designed to bring joy to all music lovers.
The components
The package includes a compact 4-channel amplifier and a powered subwoofer, both mounted in a Toyota-specific bracket which mounts under the left rear passenger seat and wires up using Toyota-specific harnesses. The PSU-300TCM upgrade is compatible with the factory Toyota base radio and almost all other aftermarket receivers. Alpine says you should be able to install this upgrade in your car in two hours or less.
Universal power pack
Alpine's KTP-445U Power Pack amplifier increases your radio's power output to 45 watts RMS by 4 channels, considerably more than what's put out by the Toyota radio. A universal plug lets you feed a signal via RCA outputs or speaker-level wiring. A built-in high-pass filter optimizes the sound for your speakers.
Compact powered subwoofer
Alpine's PWE-S8 powered sub uses a Class D amplifier rated at 120 watts RMS to drive the 8" shallow-mount, high-excursion subwoofer, so there's plenty of power for your bass. The amp features controls for phase, gain, and a low-pass crossover, so you'll be able to blend the bass with the rest of your system.  A wired remote control lets you adjust the bass level from the driver's seat. 
Important Note: This upgrade package won't work with Toyotas with the factory premium JBL system.