This Alpine Full Sound System Upgrade is the perfect sound solution for Wrangler Unlimited owners who enjoy driving with or without the top. Those who drive with the Jeep top off can often find it difficult to get good sound reproduction due to the exposed cabin. This system loads the lower frequency sound into the passenger's foot well area to provide improved sound performance even during open air driving. The 320-watt system consists of a PWE-S8 powered subwoofer and a MRV-F300 V-Power 4-channel amplifier. It also includes SPT-70 6.5" component 2-way speakers with a 1" silk dome tweeter, SPT-71 6.5" component 2-way speakers with a 1" premium silk dome tweeter and wiring harnesses. This Alpine Full Sound System Upgrade works with an Alpine Restyle dash system, aftermarket head units or the Jeep factory radio.