Read on, and we’ll talk you through some of the most common causes of this irritating issue, and explain the best fixes for each one. FM and DAB will be less affected, but as Lundavra says some DAB sets can check signal quality as well as level. If you’re finding yourself frustrated by bad DAB signal, then don’t worry- we’re here to help. Signal Booster, SLx TV Single Output Amplifier 27828HSR With Integrated 4G Filter - Improve Picture Quality And Channel Reception - Boost Your HD TV/FM/DAB Signal. Thanks! For instance: Geography: Depending on where you live in the country, there’s a chance that your signal might be lower than it should be. 1 Way - For HD and Freeview 4.0 out of 5 stars 2,127 I've just had a rewire so made sure there were dedicated separate FM, DAB and TV feeds and sockets. Before you select the best indoor DAB aerials for your needs, it’s worth figuring out why you need a signal booster in the first place.