I'm confused by comments by owners of the TMDR concerning updates. There is no USB port on my TMDR and I certainly did not buy this amp expecting to upgrade it. As far as the reverb goes my reverb is about exactly the same to operate as my tube version was. I hadn't even noticed or considered a need to change it. My reverb is set to just over 2 where it always was on th DRRI. If I want a different speaker I can fit one but this amp was modelled on the best example of a DR Fender could find and I will remain happy with the black one.