Blake,
Specs on the products may change. In this is the case for the 385c dI. The wattage on the unit was increased (after the box/manual was printed) to the below: Power Output (RMS): 500 Watts (RMS) Power Output (Peak to Peak): 4000 Watts (Peak-to-Peak)
You can find the specs on our website if you search for the 385c DI and then click on the spec tab on the right hand side of the unit's page.
Overview / Features / Specs / Support
Should you have any other questions, please let us know.
Thank you
Deborah @ Humminbird Customer Service