ESX SX-BLT4 - Transmetteur de Ligne Symétrique 4 Canaux ofc If you have an Alpine

If you have an Alpine or other brand radio

Bass boost (CH 3/4): 0/6/12 dB

including high-efficiency transformers

Active subwoofer compatible with expanding your audio system

RCA (2Vrms on 10kΩ): ≤0

ESX SX-BLT4 - Transmetteur de Ligne Symétrique 4 Canaux ofc If you have an AlpineESX SX BLT4 4 Channel Balanced Line Transmitter Product Description The ESX SX BLT4 is a balanced line transmitter designed for interference free high fidelity audio transmission . Thanks to Balanced Line Signal technology, used in professional audio, this converter guarantees a stable and clean signal , ideal for high performance audio systems. Why choose a balanced signal? Conventional audio cables are susceptible to electrical interference