As I said in an earlier post, putting a Thumpinator HP filter in my signal chain made a very noticable improvement to my little Fender Rumble 100. Makes a big, big difference on a smaller single cab combo when the power is focussed on delivering the frequencies you want, and not being drained by inaudible mush. Seems much more dramatic on a small amp with limited headroom than a big beast with masses of grunt. I'd absolutely recommend it in this context.