Here is some insight on home vs. proamplifier designs.
The typical home amplifier of high power will use 90v rails (180v) and will operate into very low impedance loads if designed
to do so.
Important -> The rail voltage is one variable in the power equation
and less rail voltage = greater chance of clipping the audio signal.
Lower powered amplifier will have less rail voltage, higher powered
amplifiers have higher.
The typical prosound amplifier of high power will use much higher
voltage rails, lets say 125v - 140v estimate. (250v - 280v)
But many are not designed for 1 ohm per channel stability. The heatsink
design is minimalist in nature to keep the design in an industry standard
chassis, that is why they have fans to dissipate the heat from the
smaller heatsinks. Also, less heatsinks = lower cost.
You can easily modify a prosound amplifier with alot more heatsinking
and you will be able to drive a lower impedance load if the output
stage is up to the task. It may not be depending on how much
output stage redundency is used and how much power the transformer
is rated for, but nonetheless, you can operate it at a lower impedance
even at reduced power depending on the loudspeaker connected to it.
Prosound amplifiers add much more signal processing to the equation
which goes against audiophile thinking that 'less is best'. The funny
part is that people are providing testimonials that their high powered
prosound amplifiers are doing great.
Oversized amplifiers =