Puritan uses cheap brass outlets and inner outlet rings Thst is why it is a bit bright
on you tube they show the inner ring upgrade to Furutech copper gold ,3 x better conductor literally ,my friend did Thst upgrade and trashed the hospital Hubble type brass outlets for gold over copper for about $500 in total lA Substantial Audible improvement I called Puritan out on it and asked why not a SE upgrade on the 156
they said not necessary . Thsts why I would never own one ,AQ has Gold Berrylium Copper outlets ,quality does matter !!