BJ has done quite a lot of excellent "boost" pedals over the years, all with slightly different purposes, such as:
- Sea Blue EQ (SBEQ). This is a parametric EQ booster with some distortion (it boosts part of the EQ range). Most of you are probably familiar with this pedal.
- Baby Pink Booster (BPB). This pedal boosts the volume evenly across the EQ range.
- Red Rooster Booster (RRB). This provides a gain boost. The idea is to use it to push your system into distortion or produce a increased gain effect.
- Little Red Trebler (LRT). Think of this as a variable "bright" switch as per Fender amps; it adds back the treble you lose once you turn the volume down. BJ did a great article on this pedal here:
http://www.bjfe.org/viewtopic.php?f=3&t=995&start=0- Purple Humper (PH). This provides an increase in the mid frequencies (you know, hump your mids).
- Little Green Emphaser (LGE). This provides a pre-boost and adds level, some grit and an EQ shift between 2 pre-defined shapes. The closest I can think of is the Lovepedal COT 50 with a better EQ and less grit.
As you can see, all of them provide some kind of "boost" in its own way. If I had to take one or more of the above and put them into a MP pedal I don't know what I would select. In my environment I have found the LRT and LGE to be incredibly useful - the LGE goes in the front and the LRT goes at the end; mind you the LGE on the end is wonderful too. The LGE is one of those pedals that can be left on all the time to impact the tone, like the COT 50. You know, a graphic showing the frequency curves of all these pedals could be useful...