
z Model: 4-Door Wrangler Unlimited JL
*Not compatible with factory amplified systems
zCongratulations on purchasing the PSS-23WRA. This installation manual is designed to take you through 
the step-by-step installation of the PSS-23WRA into a 2018 -Up Jeep Wrangler Unlimited. Please familiarize 
yourself with the owner’s manual and if you still have additional questions please call 1-800-TECH-101.
zDesign and specifications are subject to change without notice for improvement.
To Ensure Safe Use, Always Follow These Precautions
zThe installation of this product requires specialized skills and experience. We recommend that you have the 
product installed by an Alpine authorized dealer.
zBefore you use this product, be sure to carefully read this installation manual and the separate user’s manual 
so that you can use the product correctly. Alpine Electronics bears no responsibility for problems that arise as 
a result of failure to follow the instructions in the manuals.
zThis manual includes a number of symbols that are intended to help you use the product safely, to prevent 
harm to you and others, and to protect against damage to property. These symbols and their meanings are 
listed below. Make sure you fully understand these symbols before you begin reading the main text.
Explanations of Injury and Damage That May Result from Incorrect Use
Ignoring the content marked by this indication and using the product incorrectly may 
lead to death or serious injury.
Ignoring the content marked by this indication and using the product incorrectly may 
lead to injury or property damage.
Wrangler Unlimited 2018 – UP 
*  The specified vehicles have been tested and have met compatibility specs at the time of testing. Compatibility is 
not guaranteed if the manufacturer has made production changes to the listed vehicles above.
 Warning: Before you begin, remove the ground wire from the NEGATIVE (-) 
terminal of the battery. Failing to do so can lead to electric shock, injury or damage