Stetsom HL400.4 DSPlayer 4-Channel DSP Car AmplifierStetsom HL400. 4 DSPlayer 4 Channel DSP Amplifier Bluetooth + USB + Optical 400W RMS Key Features & Inputs: 4 Channel Full Range Amplifier + DSP Built In Digital Signal Processor Bluetooth Streaming USB MP3 Playback Optical Audio Input (High Fidelity) RCA & High Level Inputs FM Radio with Favorites DSP Control App: EQ Delay Level Phase Crossovers Channel Config for Car Loudspeaker Power Ratings (RMS): 400W Total RMS 4 100W @ 2 Ohms (13. 8V) 4 70W @ 4

⚡ Pro-Grade Components:

1" voice coil for stable heat handling during long listening sessions

and pro audio door setups

or a hybrid setup

durable paper cone with cloth surround

Low-profile design fits compact installations

Because it gives you a complete audio upgrade:

Whether it's street sound

🛠️ Built for Maximum Bass Anywhere

✔️ Double DIN digital multimedia receiver✔️ Large 6

Square button layout — rare and OEM-matched

Gain/Volume Control: Adjustable master