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When you play an acoustic, electric guitar you have the best of both worlds, because you can gain the advantage of the increased range and volume an amplified guitar allows as well as the portability of an acoustic guitar and the ability to keep playing if you lose power or there is not a power supply near you.

Most modern guitar amplifiers are almost trouble free, but they do have parts that will eventually need replacing such as the rectifier and power tubes. In most cases, these are no more difficult to replace than changing a light bulb. But extreme caution needs to be taken when working on a power amplifier as they contain high voltages inside and should only be fixed or repaired by a qualified technician.

Your Amplifier won’t turn on

In most cases, there is a simple explanation of why your amplifier is not working, so if you’re having problems, these are some things to check and consider:

First, make sure that:

  • Your guitar amplifier is turned on and connected to a live power supply
  • Ensure that your amplifier it turned on correctly and not in standby mode
  • Check that the mute switch is off
  • Ensure that the guitar leads are plugged in correctly and firmly
  • Check that your acoustic electric guitar is switched on
  • Ensure the speaker wires are connected properly at both ends
  • Check the volume on both the guitar and the amplifier to ensure they are set correctly
  • For safety reasons, some amplifiers will not function properly without an adequate earth, so ensure your amp is earthed

Blown fuse

There is always a reason an amplifier blows a fuse, it could be because of a power surge or a short has developed. Normally, if you blow a fuse, turn off your amplifier and replace the fuse. If it blows a second time, then you will need to find out why, often it will be a weak or old power or rectifier tube, just like guitar strings, they eventually wear out and need replacing. The fuse blows to save the amps circuits from possible damage.

Lots of background noise

This can be due to a number of things from the electrical feed that you’re using to the lighting and other electrical components around you. Your body can also affect the amount of background noise. When you touch the strings, your guitar will be noticeably quieter as when you touch them you effectively ground out your body so reduce the amount of noise your guitars sensor pickup. All radio frequencies can cause static noise. You will find your setting perfect in one place and then without changing them, they produce noise issues in another area.

The best solution is to ensure your amplifier has a decent ground connection and all the grounding wires are intact.

Over Heating

This can be caused by incorrect setting and having speakers with a lower impedance value than the amp is designed to operate with. Check that the cooling fans are working properly

When using an acoustic electric guitar with a power amplifier it’s important to make sure they are well balanced and that all the leads and connectors are in good condition with the ground wires intact to reduce the possibility of background noise.