This is an amazing pedal. Combination fuzz and envelope filter, each side is great individually but the responsiveness of the filter with the link switch engaged is off the charts. The original Chunk Systems pedals could only be connected with a jumper cable, and they’re long out of production so very pricey if you can even find one. Custom order is the way to go, dozens of options and the builder worked with me and kept me informed throughout the process. Highly recommended!

Excellent quality workmanship, sounds good, affordable price.
Leds just right and not blindingly bright
Would buy again.

I've not had the pleasure of playing through any Chunk Systems gear, but based on my internet research, and some samples posted on Talkbass, the Funky Puppy seems to nail it.
I have never experienced a filter like this one. The response, range, and tone are pretty unusual in my experience. I'm smitten. It's possible to find settings that cause the filter to open and close in a very non- linear fashion. Squelch yields a similar result to Resonance on other devices, but also has a notably different character than resonance. There is much more deep diving to be done. The Fuzz is a solid offering that pairs extremely well with the filter, and the envelope link plays a huge role. What a cool, fun, musical device, and the Hammered White finish is a nice bonus.

In my mount rushmore of bass fuzz pedals.

what a SUPERBE circuit, and the link switch is a stroke of genius. I'm getting the sounds out of it, that I want. Much better than the 3Leaf Trifecta (which I do love, but don't give me the combined synth sound, that I want).
And WAY better than the overhyped MXR bass synth, analog tracking.... Well, there is no tracking! It just does, what I play. Perfect!

As I have the soldering skills of an angry donkey in the dark, this seemed the best way for me to give my Sterling Stingray 5 a much needed upgrade, when it arrived it was obvious the person who makes these takes it seriously, extremely well made. But what really blew me away was how much the sound was transformed, the original Sterling Stingray preamp is as inspiring as a burned spud, so I was expecting an improvement, but not to this extent. I’m honestly shocked how good this sounds, really thick low end, great mid and high, rolling off the top and mid gives a beautiful warm rounded tone. I was lucky many years ago in having an Ernie Ball Stingray 5 for a time, and I really feel like this preamp gets me very close to that great sound again. I opted to add in the micro-toggle to give me access to switching the poles and I’m glad I did, even more tone options! I’ve bought the pcb version too for future projects, let’s see if I can de-donkey my soldering.

Great quality PCB, very happy! TRGPC rules!

Good selection of products and slick transaction.

Good delivery time and quality part. Well packaged. Price okay.

I think thats all you can ask for.

Easy build, easy to find parts used and it sounds great.

I feel like I took a gamble and it paid off big time. I have never heard of The Really Good Pedal Co, so was a little reluctant to purchase this preamp. Initially, I was going to just order the PCB and a concentric pot, but this solderless kit is really good value with the 3 pots and jack.

After fitting this preamp and re-wiring my humbuckers to parallel across all 5 pickup selctions, I'm really digging this. Being able to scoop out the mids, or even add them for rock is so good. No more clipping when increasing the low end, plus preamp works great with the oem pickups. Which is great, because 2 high end 5 string humbuckers are damn pricey. All in all, a solid upgrade and you'd be nuts to look past this.