yes...yes it is
This is to prevent damage. You may have something not connected correctly or parts that are not compatible.
Yes, but it is not very useful in open loop mode. In open loop mode, unless you happen to be very lucky (as in extraordinarily lucky, meaning you won't be) the output will be pegged to one of the two rails. The op-amp will be operating in saturated mode instead of linear mode, and its response time will suffer. You could also damage the op-amp.
AMP stands for alarm monitoring protection.
nope most likely a ground check your ground and wires worst case check ground on body of amp with a screwdriver
It can cause a fire. The circuit is protected by the 5 amp fuse. This fuse is protecting the wiring in the circuit from overheating and catching fire. Install a 10 amp fuse and the protection is lost. Very dangerous to substitute a larger fuse.
Need to know which 20 Amp fuse is blowing.
something is wired up wrong or you overloaded the amp
you might have you subs hooked up wrong i the box idk check and make sure might blow um
The purpose of a fuse it to protect the wire that goes to the load. A 15 amp fuse protects a #14 gauge wire. A 20 amp fuse protects a #12 gauge wire. To answer your question if the wire size is #12 coming from the 15 amp fuse now then it can be upped to 20 amp fuse. If it isn't then you are taking the risk of overloading the #14 wire with a 20 amp fuse. This can lead to insulation failure of the #14 wire, overheating with the possible outcome of a fire breaking out somewhere in the circuit.
overheating or drawing too much power
You need to run at least 500 watts from a real amp to push the speakers to potential without overheating. I am running a 1x1000watt monoblock kicker amp at both of them and it is all I ever wanted and it will handicap anybody within 100ft of the car.
So long as you remain with the range of the device (power supply rails less a volt or two), the output of an op-amp will go to what ever value is required to maintain the input stages (bridge) to remain the same. So, the effect on input voltage on output of an op-amp is dependent on the feedback circuit.