How to Bridge a 4 Channel Amp
Generally there are only two such suitable inputs: A line-in computer input blue that is separate from the computer’s microphone input usually pink Failing that, a line-in input on a USB or Firewire interface. Connecting to line-in of the computer In general, you need to run an appropriate cable from an output on the external device for example a tape deck, or a phono amplifier or receiver connected to a turntable to the line-in port of the computer. Do not connect to the mic-in port of the computer.
A standalone turntable should not generally be connected directly to the computer unless you are making specialist recordings from pre s discs. The best option is usually to connect to the source device’s “aux out”, “tape out”, “line-out” or “record” output if so equipped.
Oct 13, · Just to cite an example, I have two 4-ohm subs wired in parallel, which presents a 2-ohm load to my amp (HiFonics). I have it bridged/mono, so the amp sees a 2-ohm mono .
Whether it’s an installation that might not have gone as planned, or a random problem that comes out of nowhere. Here is a list of your common car stereo problems, symptoms and solutions to help get your stereo up and running! Many Jeeps and Chevrolet systems have a data signal wire that carries a very low voltage signal that tells the OEM Head Unit when to turn on, however; it is not compatible with aftermarket units. If you have a voltage meter or a test light, test the ground black , constant 12v yellow , and accessory 12v red wires to make see if you have the correct voltage in the correct wires, as well as a good ground.
Constant will always be 12v, whether or not your car is on. Make sure to use your ground, as well as another ground like the frame or body of the car while testing your constant and accessory to test that you have a good ground. If you find that one of your power wires or ground wires are not correct, check your vehicle wire diagram and make sure you have the correct corresponding power and ground wires. After finding the location of the fuse, pull it and make sure that the leads are not corroded and that the fuse has not been broken or popped.
Most aftermarket amplifiers have a protection from low and high voltage. Vice versa, if your battery is low and the amplifier is not receiving a constant 12v, it will enter protection mode. Amplifiers will also enter protection mode if there is a short somewhere. If you have a signal RCA wire that is shorting out, this could be your problem so check to see if your RCAs are in-tact and not shorted.
Also, if one of the output channels are shorted out, or you have a blown speaker, many aftermarket amplifiers will enter protection mode.