Unamped, RE0's bass rolls of dramatically, when amped, it doesn't. GR07 bass extends lower indeed, but it lacks presence somehow, so that the end result I do hear sounds pretty equal to RE0, especially compared to the modded one. However, stock RE0's do also have a mid-treble peak, not that sibilant, but worth mention. RE0 wadding mod, reversible and easy made, (take of the paper filter, put some wadding in the tube, cover the exit with a new paper filter, done) brings you even more bass quantity then GR07 does and also more neutral sound overall. The major sonic difference I hear comes from GR07's sibilance (6khz peak) and a wider stage, too wide for my taste, but very good at instrument separation indeed..
Edited by AlexRoma - 6/19/11 at 6:22pm