HONGGE 400W Max Four Channel Class D Car Amplifier
A four-channel Class D car amplifier for anyone upgrading their in-car sound.
You save $123.99 at JCPenney
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The HONGGE 400W Max is a four-channel Class D car amplifier rated at 400 watts maximum. Class D design keeps it smaller and cooler-running than older Class AB amps, and four channels let you drive front and rear speakers or bridge two channels for a subwoofer. The best new price is $123.99 at JCPenney as of November 8, 2026, the only new price listed. At that price it sits at the low end of four-channel Class D amps, which is where budget-brand amps usually land.