Actually for improved bass response, if you are considering the FirstWatt amps, I'd go for the F1, F1J, F2 or F2J. These are current source amps, which do not work with most speakers with crossovers, but I believe will work with the type of crossover the Lore employs (check with Lore & FirstWatt to confirm this!). But an advantage of current source amps is the greater extension in the low frequencies, in addition to the ability to customize this bass response by adding resistors at your speaker inputs.
(Must resist temptation to mention damping factor....Just see my above posts on it, since I have found that this can drastically affect the speaker's bass response).
(Must resist temptation to mention damping factor....Just see my above posts on it, since I have found that this can drastically affect the speaker's bass response).