Best ADSL Filter Best buy ADSL filter for sale in the UK (May 2022). #1 Selection: My Score = 93% SaleBest Overall BT Telephone ADSL Filter Adapter, ADSL Microfilter, BT Male, BT Female Socket... #2: Best Alternative Also Good ASNQ ADSL Filter - Microfilter for Phone/Broadband BT Plug to RJ11 Connector -... #3: Best Budget Also Good CDL Micro ADSL Micro Filter for BT Line Broadband/Tiscali/Sky/Talktalk/Orange/O2... – – Recent Roundups