Stern Pinball Speaker System Upgrade Kit

Stern Pinball Speaker System Upgrade Kit includes:

• A pair of tweeter for back panel speakers
• A pair of mid woofer for back panel speakers
• A pair of crossover for back panel tweeter and mid woofer
• One piece of 8" cabinet woofer
• One piece of cabinet woofer crossover
• One pair of back panel speaker adapter for 4" speaker plate (Premium / Pro)
• One pair of back panel speaker adapter for 5.25" speaker plate (LE)
• One piece of cabinet woofer adapter
• Eight pieces of short wood screws to install back panel speakers onto adapters
• Eight pieces of long wood screws to install the cabinet woofer onto the adapter

Installation instructions are here.  You can also see how this project was designed from the beginning on the Pinside thread.