Why don't higher end amplifiers come with a separate power chassis?

Many higher end preamplifiers come with separate power boxes, but I don't see amplifiers with separate boxes, any idea why this might be?

emergingsoul01-07-2023 12:44am

invalid Details Discussions Posts This discussion Message User 1,371 posts 01-07-2023 at 04:43am Copy Comment URL Report Comment Edit Delete Pass labs does it in their XS series.
jond Details Discussions Posts This discussion Message User 6,103 posts 01-07-2023 at 05:38am Copy Comment URL Report Comment Edit Delete It's very expensive and as stated above not as necessary as in a preamp with very low level signals.
antigrunge2 Details Discussions Posts This discussion Message User 1,561 posts 01-07-2023 at 11:16am Copy Comment URL Report Comment Edit Delete It comes down to the ratio of transformer noise to output signal: high on preamp, low on power amp.
charles1dad Details Discussions Posts This discussion Message User 10,250 posts 01-07-2023 at 01:13pm Copy Comment URL Report Comment Edit Delete In addition to the examples cited above, Border Patrol Audio uses separate chassis for signal path and power supply. Thomas Mayer (Germany) employs this approach with some of his amplifier models. I can see a strong case to be made for either this method and the more common/traditional mono block design. Charles
mitch2 Details Discussions Posts This discussion Message User 4,733 posts 01-07-2023 at 02:34pm Copy Comment URL Report Comment Edit Delete Steve McCormack at SMc Audio is offering DNA Power Block External Power Supplies for their upgraded (and I suspect new) amplifiers.