REL HT/1003 MKIIBut Your Wallet or Your Room Says No Perhaps the most dramatic update in the entire HT range is delivered by the remarkable HT 1003 MKII. In theatre, nothing impresses like raw output, even if you dont use all of it. HT 1003 MKIIs increase in usable headroom confers an ease to the sound that lesser designs cant compete with. Here, we realize a full 10 dB higher output (thats twice as loud) over its forbear. As with its larger brothers, HT 1003 MKII