The Sennheiser EW-D AB (S) is an inline antenna booster designed to enhance RF performance for Evolution Wireless Digital systems operating in the 606–706 MHz frequency range. With a fixed +10 dB gain and BNC connectors, it compensates for cable losses over long antenna runs — ensuring stronger, more stable signal reception in complex setups.Compact and easy to integrate, it’s ideal for installations, touring racks, and larger wireless systems where consistent coverage is critical.