In general budget pro audio amps will not have hi fidelity specifications as the purpose is to deliver power in DJ type environments where it is more about slam and bang than music quality.
Higher priced pro audio amps are used by some at home as well , more so in HT setups where the focus is towards higher dynamics.
The reason we probably don't see pro audio amps commonly in home audio setups is probably because there is no need for high power capability taking into consideration the room size, listening distances and also not needing to satisfy a bigger audience.
Most home audio speakers are built to have reasonably higher efficiency and can be driven by low powered amps.
Home audio amps are also normally easier to handle in terms of size, weight and the current they draw.
In a not a careful hand, a pro audio amp can end up frying the speakers.
The logic to this exercise is as follows:
Get a high powered well designed class AB pro amp. Suppose it is rated at say 500W at 8ohms. Objective is not to run it close to 500W. It would probably top out at 300W factoring in dynamic transients. Since we would be using about 50% of the power the distortion would be less as well.
Any speaker that is 89db and below benefits from extreme power. This is because you need a lot of headroom to allow the speaker to sound uncompressed. Most music is listened to at about 80-85db but the speaker benefits from having atleast another 20db of headroom to sound effortless.
However I am worried about the odd harmonics as when an amplifier or any component is asked to reproduce a particular frequency say 3khz it also reproduces accompanying harmonics like 5, 7, 9 etc. and also even ones. In SS based amps you tend to see stronger odd harmonics.
If these are not suppressed, you will find the amplifier brash or hard sounding. Please note that though each unwanted harmonic maybe 80db below the reproduced frequency they all add up. This is the primary reason why amps sound different. Some designers will flavour the amp this way. Decware had a video on this sometime ago.
Then there is the SMPS power supply switching noise that bleeds through and makes the amp sound hashy i.e. you do not get a black background.
Most PA class D amps use AD conversion to the input signal which allows for DSP processing which I am not keen on. Plus class D can have issues with its output filter flavoring the sound as well as speaker impedance matching issues (similar to the filters used in DACs where each type of filter has its own flavour). This is why class d amps do not sound as powerful or as consistent with different speakers as matching class AB amps, though I could be wrong here.
Hence in theory atleast if one has a well made amplifier that:
1. Suppresses unwanted harmonics by say 100db
2. Doesnt have much power supply noise
3. Is played at 50 to 70% of its power to avoid clipping and increase in distortion
One will have a lovely power amp at an affordable price. Hence was looking at a very well made PA amp that hopefully addressed these design issues. I could only narrow down to two models the Yamaha Tn series and the QSC DSA series. However I have noway of testing them and hence turned to the forum for advice etc.
