I just saw the following information on cqdx.ru and it’s worth reposting here:
ACOM1500 is developed on the base of the well known ACOM1000. The tube GU74B has been replaced by 4CX1000A and the power supply is beefed accordingly. The RF power is up to 1500 W. PEP output on 160 trough 6m Bands. Another improvement is the internal antenna switch with three antenna outputs. The LCD display has been replaced by VFD type. The size is unchanged, only few kgs has been added to the weight.
Apart from the higher power which is irrelevant in the UK, the main difference is the three antenna outputs. I run with my Array Solutions Power Master II meter connected all the time so I wouldn’t see any advantage anyway. I use an external Alpha Delta-4 antenna switch.
For those looking for a 1.5kW amplifier though, the Acom comes from a company with a good reputation and I’m sure it will be a popular addition to their product range.