I would expect any amplifier to deliver full power across the entire human audible range.
While one might argue that full power at high frequencies isn’t always necessary, the area where full power is absolutely critical is at low frequencies. In this regard, there should be no room for compromise.
OK I get where you are coming from.
1) However playing 20Hz tones at 1400W versus 1000W is somewhat different than
2) Playing music with a peak value of 1400W, and an RMS power at whatever the crest factor ends up at.
The test says it will not do #1.
There does not seem to be a test showing that it is doing #2
And, at home, we do not usually do scenario #1…
That is my point.
That failure to do 1400W sustained is meaningless unless you have some open area and/or huge room.
In which case one is almost certainly using multiple amps and speaker boxes… often some of them being subwoofer boxes.
Maybe you are blessed with a very large room, and it is a real concern.
... In this regard, there should be no room for compromise.
There is not a lot of compromise here… it is good performing amp by most objective standards.
And if one is even using the full 1400W, then they just get consider using a beefier power supply.
Otherwise it seems like pissing-n-moaning about loss of a dB or less, and a legal challenge towards not meeting spec.