I have the Magnepan LRS and two REL T5i and can assure you this is a wonderful and relatively inexpensive solution to deeper bass. I would recommend monoblocks with this set up because it works well this way and what Magnepan designed with. Bryston 7BSST2 would be dynamite but maybe overkill. The mags do love power. Now I have the LRS in another location with Bryston 4BSST with no subs. The room is huge with an alcove behind the speakers and I must say the bass is acceptable in this room and with that amp. The key to the REL T5i is twofold, it downfires, and at 8" won't go too deep to make blending less likely.
magnapans.7i and subs
so i am looking to ad in a couple subs. my magnapan dealer likes paradigm subs and has suggested the defiance x10 specifically. upon reading about this sub it is ported. i have always assumed sealed subs are suited better for 2 channel listening. just wondering if anyone has this setup or has experience with this particular sub