Alesis made some years ago several cheap efx called ModFX, and one of the serie is called Philter. Last year, it was hard discounted (i paid mine 29$!), and is rather good for that !
If you like the global concept of the tweakalizer, then go buy it with eyes closed
But if you have some exigence on the sound and are looking for resonant filter, i'd suggest to look for something a tad better on ebay or somewhere else.
The reason is that most multiefx units have strenght, but also weaknesses, and for 130$ brand new...

