When I got the TC-50 I ran it through the typical check, how does the FX loop sound and so forth. I am sure I pulled out the Mesa 5BGEQ pedal at some point. Perhaps I did not feel the need to tailor the tone of the TC-50 and it may have been something I just did not think was necessary. Now that I have the TC-100 I figured I may as well find where I stored the Mesa 5BGEQ and give it a try in the FX loop of the TC-100. Reason other than the latest video released by Mesa and Willie Adler;Lamb of God, how will the EQ pedal work for my application? I love the raw tone of the TC-100 and the TC-50 but when running a dual amp set with the JP-2C, I figured to give the EQ pedal a go with the TC-100. Now that definitely adds some more flavor to the tone farm. Those who have the TC-50 or TC-100 or are planning on getting one of these amps, I would also recommend an EQ pedal for expanding your tone even further. I can get the TC-100 (running EL34) on CH3 or CH2 to get very close to the characteristic of the JP-2C. No, it will not give you the depth of the bottom end of that amp but brings it much closer. Doing a side by side comparison of the TC-100 (with the Mesa EQ pedal in the loop) and the JP-2C (having its own GEQ setup), I was almost thinking I like the TC-100 with an EQ in the loop a bit more than the JP-2C. When blending the two amps together, sounds great with the TC-50 or 100 without the EQ in the loop, but it only gets better from there with the EQ active in the FX loop of either amp. I found my sound for sure. Note, if you are using other FX in the TC loop, it may be more beneficial to place the GEQ last in the chain which would be closer to a traditional Mark series amp. If you are after the Mark V:90W character, place the EQ pedal in the front of other pedals you have in the FX loop. I was considering getting one of those Boss ES units so I can control my amps with midi function and select what FX are active. Tired of doing the pedal dance routine especially with the JP-2C running parallel to the TC amp. Wonder of that gear would work in the FX loop. Still looking into the best options as I do have pedals that would be best up front. May need to find a loop controller or get two of the Boss ES units. It has not been much of a need as I normally do not run any effects unless I am recording with a multi-track rig or with another guitarist.