No need for 2.8 I have 2.7 in both main and sub rx. A joy to use. It is nice that it is just a bit wider than the 2.8 for some broader audio. 73, Arie PA3A -----Oorspronkelijk bericht----- Is is worth taking the hit and replacing the 2.7 khz 5 pole with the 2.8 khz 8 pole? Bob, W1EQ