FX-25 Question

ko stradivarius · #1 10-10-2008, 09:40 AM

Does anyone know if there is a trim pot to further adjust the sensativity on the older lime green model?
The reason I ask is that I have to turn the sensativity, via the knob, up almost all the way to trigger it from my passive basses.
I just got hold of this pedal and it is ~well used~ so I'm hoping its not just fooked.

Thanks

selfblessed · #2 10-10-2008, 10:30 AM

I just got one too. Well a sparkle green one. I find that there is a definate sweet spot near the end of the pot. Ill want to bust mine open anyways so if I see anything Ill let you know.

selfblessed · #3 10-10-2008, 10:42 AM

Nope nothing in there. Interesting note mine is an FX25 revision G. I wonder if there is a mod that you could do. Trim pots are just adjustable resistors...right?

F0URwordLETTER · #4 10-10-2008, 10:55 AM

what version do you have?

bongomania · #5 10-10-2008, 12:44 PM

I have all of the versions (literally) and none of them have a trim pot. There is some variance in their sensitivity, but that might even just be due to different tapers on the pots. I think (going by memory, I'll have to look at the schemo later) the sensitivity pot fully to the right is "zero" resistance, making the pot an input attenuator for the envelope follower. If that's right (again, I'm not promising it's right) then changing the pot to any other value would not help at all. Only a boost applied at the input would improve the response.

selfblessed · #6 10-10-2008, 06:25 PM

Bongo did you ever do that FX25 photo essay?

bongomania · #7 10-10-2008, 06:59 PM

My dog ate it.

I got started on it countless times, and other stuff just kept piling up. The last day I worked on it, I was rigorously A/B'ing them all, and they started to all sound the same to me. So I need to go back in with a plan for comparative listening that won't fatigue my brain.

selfblessed · #8 10-10-2008, 07:04 PM

Huh. That's cool. I am really digging this sparkle green one I got off of ebay.

kevteop · #9 10-10-2008, 07:43 PM

Quote:

Originally Posted by bongomania

I was rigorously A/B'ing them all, and they started to all sound the same to me.

Well it was a noble cause. Bless you.

KarateKid25 · #10 10-10-2008, 08:24 PM

I have a similar issue with my FX25 if I run it with my Warwick Thumb, Ric, Passive Jazz etc... It just seems to prefer the hotter output of my Stingray.

To get a good response from the FX25, I run either a Cream Pie with clean settings or a Blueberry OD with a bit of dirt in front. This boosts the signal up nicely and gives a choice of some other tones too.

whoatherechunk · #11 10-10-2008, 08:44 PM

so what's usually the verdict? is the old 80's lime green one usually considered the best?

KarateKid25 · #12 10-10-2008, 10:02 PM

I couldn't really pick a difference, so I went with the sparkle one as it was about $10 cheaper.

bassteban · #13 10-10-2008, 11:05 PM

I have the later FX-25b; it seems to like all my basses(passive J-5, active Warwick, passive/active Stambaugh). Either that or I just can't hear.

selfblessed · #14 10-11-2008, 01:28 AM

Quote:

Originally Posted by whoatherechunk

so what's usually the verdict? is the old 80's lime green one usually considered the best?

I have heard great things about all before sparkle green. I just got a sparkle green...she rocks. I also have not tried the others.

kesslari · #15 10-11-2008, 10:11 AM

I scored a kermit green for $40 locally. She rocks, too.