In my opinion, these are the best sounding Big Muffs ever made...from the 2000-2001 era when Fran (from Frantone fx) was working for EHX. In fact, she is the fuzz guru who designed the EC3003 and EC3003-A (only difference is that the A version is true bypass) board 2000-2001 Big Muffs...this iteration was very short lived and the circuit was changed again in 2002 after she left to start up her own company. The following design wasn't nearly as good (the version that's still around and being produced today), much muddier and undefined sounding. The 2000-2001's have loads of range (you can even coax some very nice overdriven tones, which most muffs aren't capable of) like a Rams Head on steroids but it can be dialed back to sound just like those as well. I've owned just about every high end/boutique muff clone out there, and I've found nothing that can compete with these...they are absolutely stellar. This one has some cool patina on the chassis, it functions flawlessly and sounds amazing. Thanks for looking and be sure to check out my other cool listings!