Gene Rubin also deals with the more expensive Little Loco whose internal linear power supply is able to put more meat-on-the-bone sonically as compared to the 48V outboard switched mode supply of the TZ Vibe.
As pointed out, lower impedance LOMC pickups work best and your signal cables, however terminated, should be balanced construction as opposed a to coax type - high inductance is disruptive to current flow.