Arny Krueger wrote:
SNIP

If weight is not a big issue, such as if
it were on an airplane or even a car, a heavy unit is
less expensive and longer lived-one can overspecify
transformers, put in bigger caps, use a heavier chassis.

That necessarily helps sound quality how?

Bigger xfmrs have lower flux density at a given power throughput and
heavier chassis means better shielding and mechanical stability. That's
the way to bet, anyway.

Light boxes CAN be good, but at higher expense. Consider the Narco
coffee grinder ADF beloved by BCB DX listeners-you couldn't build one
today like that.