I just bought the stompbox pedal Aphex Bass Xciter and tried it at my gig last evening. For that gig, I used the Pedal with a Peavey T-Max head and a Peavey 115 Black Widow Cabinet only. The pedal adds warmth and punch to the Tone while not overloading the cabinet. It`s not an added EQ that is for sure. It helps cutting through by giving a better definintion and clarity to the sound. It feels like adding sustain and gives the impression there is another cabinet on the top of the one being used. I did not use the DI yet but I am anxious to hear the difference using a bigger PA system. My Rickenbacker Bass sounded really good last evening. You can do great without but it`s a nice tool to have. I had a SansAmp BDDI in the past and I prefer the Aphex over it but that`s just my opinion.