4x50W Car DSP Digital Audio Processor Support APP Control DSP Car Power Amplifier Audio Digital Sound Processor for Car Audio Enhancement. Features: Bluetooth-compatible APP Control, Independent USB Playback, 4RCA DSP Audio Processor, High/Low/Volume Adjustment Knobs, 10-Band EQ Frequency Adjustment. Specification: Origin: Mainland China, Material: Aluminum alloy, Color: Brown, Amplifier technology: Class A/B, Output channels: 4 channels, Maximum stable load: 2Ω, Signal-to-noise ratio: >90db@1W (4Ω), RMS power: 4x50W, Frequency range: 20-20kHz (-3dB), Input: 4 high-level inputs, 2 low-level inputs, Output: 4 high-level outputs, 2 low-level outputs, Size: 130*98*43mm. Package includes: 1 x Car DSP Digital Audio Processor, 1 x Power Cord, 1 x Car Connection Cable, 1 x Instruction Manual.