The style of guitar and the style of music you want to play are some of the most important factors when deciding which amp is right for you. Most amps at the minimum project the guitars natural sound and allow you to adjust the gain, treble, and bass. Many amps also feature sound effects that change the voice or sound of the guitar. These effects can change a bright classic sound to a heavy metal roar and everything in between. Playing with these effects can be a lot of fun and add even more dimensions to your guitar playing. Guitar pedals are also and option for changing the sound and voice of the guitar if you decide to get an amp without those features.
Prices for amps differ depending on the size, sound, and effects build into the amp. There are many great amp options around the $100 price point that are more than suitable for beginners.