a short or too much resistance thus heat
To get your Marantz amplifier out of protect mode, first check for any loose connections or short circuits in the speaker wires. Make sure the amp is adequately ventilated and not overheating. If the issue persists, there may be a malfunction that requires professional repair.
To get your amp out of protect mode, try disconnecting all of the speaker wires and power cycling the amp by turning it off and then back on after a few minutes. Check for any loose connections, shorts, or blown fuses. If the issue persists, consult the user manual or contact the manufacturer for further troubleshooting.
Easy way to check were the problem is take a 6" piece of wire. Unhook the remote wire from your amp. Then hookup your 6" piece of wire to amp remote terminal then take other end and connect to the 12+ terminal. If amp powers up the its in the headunit. If amp does not powerup or goes into protect mode the amp is problem.
No. If you use a larger fuse you are not protecting the device which has a rating of a lesser value.
Don't know too much about amps, but fuses generally blow to protect equipment. A large surge of power can cause this or if the wrong size is replaced. DO NOT go with a larger fuse. You could kill your equipment forever or start a fire. Call the company that makes your amp.
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.
The impedance is to low causing the amp to shut down
yes...yes it is
A T5AL is a tubular 5 amp 20mm x 5mm Slow Blow Anti Surge glass fuse.
No, it is not safe to use two 20 amp circuit breakers to protect a 40 amp circuit. Circuit breakers are designed to protect the wiring in a circuit from overheating, and using a higher amperage circuit breaker than the wiring is rated for can lead to overheating and potential fire hazards. It is important to use the correct size circuit breaker for the amperage rating of the circuit.
The maximum amperage rating for a circuit breaker that can safely protect a 20 amp circuit is 20 amps.
NO! Using a larger amp fuse defeats the purpose of the fuse to protect the wiring in the circuit. This can cause a fire. Always use the correct amp fuse for that circuit.