[quote name='mcnach' timestamp='1433073008' post='2787498']
It's a funny one...
It does little with some amps that they already contain a high pass filter of some sort. But with other amps the effect is clear: the speakers move much much much less, but the sound stays virtually the same. Sometimes I feel it changes nothing in the sound, other times the bass feels a bit... nicer, "tighter", perhaps. It's subtle. But it clearly saves speakers a lot of extra work and makes the amp work less hard.
I use mine all the time. Sometimes I suppose I don't need it, but it's fitted permanently to my board. You can probably never use it and ba absolutely ok, most people don't use one! But... I feel better using one.
[/quote]
I agree with this. I wouldn't be without it.