Fuse size

Assuming a 12 volt charging system, your 1100 watt amp draws about 90 amps of current, while your 4 x 90 draws about 30 amps. Each should have their own fuse located in a distribution block, but your main fuse should big enough to cover both of them. Always round down. (i.e. if you draw 120 amps, but can only get a 100 or a 150 amp fuse, go with the 100) a circuit breaker is a good alternative for a main fuse, but only if you have a separate dist. block with propervalue fuses protecting each amp in the system.

I'm long winded. you need about 120 amps of fusing.

Hope that helps!

Don't put a bigger fuse on it. Find out the current draw and fuse accordingly.

Exactly. Mathmatically, 150 is right, but see if the owner's manual has a listing based on your system configuration, or a good multimeter can help you determine actual current draw. My previous post is based solely on the mathmatics for the equipment you posted, so it is just a reference, a guideline to help you know when you are close with your more accurate calculations.  Always err on the side of caution, however.

Teken is bang on with what he posted. In most cases you will not be drawing the rated value of the fuses in the amps, nor can most batteries / alternators give you this much current while maintaining operation of the vehicle and it's accessories as well. The purpose of this main breaker is to protect the vehicle from short circuits in the power line between the battery and the amplifiers / rear batteries / capacitors. Should your value be too small, then yes if you do play it at a loud volume level, the current draw may exceed the rating of the fuse. A 150 amp resettable breaker is a good bet.

There is usually no need to fuse amps at the rear of the vehicle anymore as most amps now have built in fuses to protect them. Fused distribution blocks were primarily designed for amps that had no fuses in them, like old Rockford, Linear Power, Orion, PPI, Alpine etc. If you have a cap or battery in the back of the vehicle then it is a good idea to have a breaker in the back of the vehicle as well, between the cap / battery in the back and the main breaker up front. Current flows in both directions, most people do not adequately protect their investment.