I have an spl 1440 watt model st2-1440 that goes into protect as soon as it turns on. I've checked all the wires and tried disconnect everything but the power wires. Other amps work fine on those connections. Any ideas whats wrong and/or how to fix it?

check you remote wire to test unplug your subs and turn on system if protection mood come one your audio output may have problem''if noting happen connect back your your subs if the protection comes back; you sub wiring have to be check or they are bad'

The PTO clutch is an electro magnet. There is probably a dead short within the clutch body. Replace the Clutch.

It could be 3 things. There could be a short somewhere, your ground isn't strong enough, or you accidently switched up the ground line and the power line on the amp. Since the fuses aren't blown I would say that your ground isn't strong enough.

The most likely culprit when an amp goes into protection mode is the power wiring. Check your ground wire, it should be solidly connected to the vehicle chassis in a paint-free location. Then check the live power wire and make sure it has a good connection. If that doesn't work, download the user manual from retrovo.com. That should help you to decode why the amp is in protect mode.

disconnect everything except the power, remote, and ground. turn off then on. if it goes into protect mode then there's a posibility that the amp if fried. check all the speaker inputs and outputs to make sure that there are no stray wires shorting out. if it stays on then you may have a short on a speaker wire or an auxilary input wire. plug each one in one at a time until it goes into protect mode, then that's the shorted wire or it could be a shorted speaker.

Generally a battery puts out 14.1 volts to the amplifier. The only way your amp would get really hot really fast is if the amp was configured to run at to low of an ohm load.

That amps spec is to run at 2 ohm stereo. But I do see an option to get 1400 watts with 2 ohm mono, but that would require 2 dual 2 ohm subs using only one voice coil bridged to the amp. If you run both subs with both voice coils in parallel you'll get a 1 ohm load and that will overheat your amp.

Reference: http://www.sweetwater.com/forums/archive/index.php/t-2193.html


Ohms are the units that impedance is measured with. You can kind of think of impedance as the measure of how hard the amp has to push to get current to flow. The lower the impedance, the more power will be output from your amp. Unfortunately, the amplifier circuit wants to push against something, so that if the impedance is too low, the amp can perform badly, and even overheat and burn out.

Hope this helps!

bad power supply or out put i hat to say it but spl is note a good company i would replace the amp

disconnect load (speakers), check if it still goes in to protection if so then your output stage might be faulty

turn down all the knobs all the way, if it still does it you probly have a bad ground connection. check all power wires.

Disconnect the speaker wires from the amplifier and see if it still goes into protection mode. If it still goes into protect with the speakers disconnected, there's a problem with the amp; if not, you may have a blown speaker or a shorted speaker wire.