Good insulation is essential for sound quality

DSP software

✓ Aperiodically damped basket for deep and precise bass reproduction

which ensures reliable fastening in the spare wheel well

High-Level-Eingang (RCA) mit automatischer Einschaltfunktion

B² Audio REF FOUR 30cm Good insulation is essential forThe B Audio REF FOUR was developed for discerning car audio enthusiasts who want to combine the highest sound quality with exceptional power reserves. The meticulously engineered Class A B power amplifier delivers exceptionally precise signal reproduction, high dynamic range, and stable power output even at low impedances. Thanks to extensive filter functions, variable input sensitivity, and a powerful power supply, the REF FOUR is suitable for both