Not familiar with the pre, but bought the amp on many recommendations here when I got my 3.7's...First amp died due to a couple of parts touching, something that Roger had modified in his latest version. He replaced the amp, instead of repairing it, to get me going, as it was only a week or so old. Great sound, makes the 3.7's really sing. Had a 200 w Gamut before and just not enough power. Don't think you will be disappointed. A great product at a reasonable price, and a great guy to deal with.
Carl