Blaupunkt BPA‑C400 4‑Channel Class AB Car Amplifier 136 W × 4 RMS 2 Ohm
Its compact form factor and wide 20 Hz–20 kHz frequency response make it a strong upgrade for both midrange clarity and bass depth in any vehicle audio system. RMS Output: 96 W × 4 @ 4 Ω; 136 W × 4 @ 2 Ω.