I have a Quilter BB800, I love the powerful tone and ease of operation. It is lacking a bit top-end energy; it does not have the high end that my GK MB500 has in spades. I was thinking the best way around this is to use a pre-amp pedal. What are the pros and cons of running the pedal in the input signal chain as opposed to plugging it into the XLR line in? What pre-amp pedals are known for their flat transparent tone? Which ones have a baked in high frequency push (I assume the GK Plex is one)? I have always liked the idea of the Empress Para EQ but it does not have an XLR out. What about the EBS mico-bass or MXR offerings? Does the Tonehammer pedal have a lot of top end? Lastly, I don't use a dirty sound although I do like to dial in some "hair" sometimes (which the Quilter is not very good at).