foster_9 OPReasons are
Interesting George, the Parasound Halo or Hint huh? Strong bass, clairty, and smooth.
"strong bass" it has big current being BJT output, good damping factor, and big engine room (power supply)
"Clarity" Typical Low distortion, solid state design (by J. Curl)
"Smooth" High Class-A bias for that top end smoothness, it will run warm.
Cheers George