A Guitarists tone comes down to 3 components, Guitar, Amp and Touch. Each part is equally important. Certain brands of amplifier lend a certain sound and we have many leading brands including, VOX, ROLAND, BLUGUITAR and FISHMAN.
Acoustic guitar amplifiers are specifically designed to produce a clean, transparent, acoustic sound. They will usually have a relatively flat frequency response so as not to "colour" the sound too much.
Guitars require a specially voiced amplifier and cabinet in order to sound good. That's why just putting an electric guitar through a PA doesn' work.
The cabinets can be different combinations of speakers and speaker sizes and most importantly will have a specific 'Ohm-age' that must be adhered to when connecting the amplifier head.
Guitar amps are specifically voiced to make a guitar sound good, and Amp heads come in different power ranges and sizes. Some are very plain, some have bells and whistles, but they all must be paired with the correct 'Ohm-age' of cabinet.
Sometimes justlifting your amp higher, or tilting your amp or combo backwards and projecting the sound upwards instead of straight out into the audience, can make all the difference to your sound. For this you need an amp stand...
When it comes to Amplifiers, it's all about the voicing. Guitar amps are voiced especially for Guitars, which is why an Electric guitar just DI'd into a PA doesn't sound so good.
Keyboards, need a specially voiced amplifier too,as they emit a much broader spectrum of frequencies. Here are the amplifiers specially designed to sound great when used with keyboards or synths.