Massive Audio PX4 4-Channel Car Audio AmplifierMassive Audio PX4 High Efficiency 4 Channel Car Audio Amplifier A car audio amplifier boosts the weak signal coming from your radio and delivers clean, powerful energy to your speakers giving you louder volume, better clarity, and richer sound detail. The Massive Audio PX4 is built for clean power, low distortion, and flexible tuning, making it perfect for door speakers, tweeters, and full range car audio systems. What the PX4 Does for Your Sound

6 Hz — deep

⚡ Flexible Crossover Control: Adjustable high-pass and low-pass filters for perfect speaker tuning

and punchy lows for a superior in-car audio experience

and harsh door environments

Mounting Depth: 40 mm

If you're running multiple amplifiers or want the cleanest possible signal flow

Durable marine-grade design for saltwater and outdoor conditions

Other Features and Specs:

Input Sensitivity: 200mV – 5V

2-Rca Male To 8-RCA

⚡ 7-Volt Line Driver for powerful signal output

a reliable choice for music lovers who demand quality and performance