Im going to say this as nicely as possible so that 1 day when you do understand where people that are 'in the know' are coming from , if it offends you then I apologise but to understand why those trying to help get frustrated you need to hear this.
3000 Watt 4 Channel Amplifier (CA-AM41200) | FUSION Electronics
Fusion IMO is rubbish , point proven to me is 1 in there marketing , look at th way this amp is advertised on their own site 3000watt , now that in itself is the biggest load of **** that IMO a reputable brand SHOULD NOT do , it will never in a million years even make half that power I dont care how much they try and argue , max ratings do not mean squat , they can do it for aslong as it takes to blink so wtf good is that to anyone.
RMS rating is the power it will make all day long without shutting off , a good indication of what it will make is the fuse ratings , they dont lie.
If it has 60 amp fuse rating its going to make around 500rms (very rough geusstimate).
This amp does not show the fuse rating and does not advertise it either.
The RRP on the amp suggests to me its full potential is about 450rms aswell , if you could buy massive power amps cheap then im pretty sure all the reputable brands would be doing that aswell ....
I can only assume you are refering to the amp in the link given it makes 150 x 4 rms BUT it does that @ 2ohm not 4ohm , they current draw would be double that of 4 ohm and the heat generated will shut off pretty much any amp after a decent ammount of time run at high volume.
I find it very hard to accept it would be capable of 110rms x 4 @4ohm aswell , almost gaurantee it wouldnt be clean sound either just based on personal experience fitting Fusion rubbish.
Take from this what you will but there is a very good reasons as to why cheap nasty products such as Fusion BOSS etc get a bad name when they cant even market their own products correctly.