How does the FX25 work

[TaySte_2000]

Now I know how to get the low pass filter sound and all that but it is the only filter I've heard to sound like this. I can get a low pass sound with my Gurgle and Moan but it's not a big and bassy as the FX25 is it also boosting something? I've nevber heard a Mutron or Moog get this sound either.

I'm just wondering that makes this one so good at that low pass that no other low pass capable filter can do it?

Thanks

[prsbass]

I have a question about the fx25 too.
I just got a 2nd generation one and I can find some usable settings but it distorts easily. Is that typical or is there something wrong with mine?

[bongomania]

Older FX25's are prone to two common failings: distortion and a drop in output level. I'm almost positive both are due to certain parts "going bad" with age- I specifically recall someone else posting that the level-drop was just a single resistor or pot. Unfortunately I haven't finished diagnosing/troubleshooting the ones of mine that need work, so I can't yet point to which specific parts need to be replaced.

As far as "why they sound the way they do", they are a different filter design than the Moog or Mutron. There are a number of different ways to cause filtering with different circuit designs, and they all sound different. It's inherent to the design, not just a question of certain components.

[prsbass]

Originally Posted by bongomania

Older FX25's are prone to two common failings: distortion and a drop in output level. I'm almost positive both are due to certain parts "going bad" with age- I specifically recall someone else posting that the level-drop was just a single resistor or pot. Unfortunately I haven't finished diagnosing/troubleshooting the ones of mine that need work, so I can't yet point to which specific parts need to be replaced.

As far as "why they sound the way they do", they are a different filter design than the Moog or Mutron. There are a number of different ways to cause filtering with different circuit designs, and they all sound different. It's inherent to the design, not just a question of certain components.

Cool maybe I'll have a friend of mine check things out for me then to see if any of the parts need replacing.