I tested and reviewed Positive Grid's Spark EDGE, an all-in-one portable PA and guitar amp that's ideal for busking.

If having an always accessible amp that's ready to go whenever you are will encourage you to play music more often, then this will be money well spent. Buy at Spark for $229.

In many respects, the Revv G20 is the archetypal 21st-century guitar amplifier. It is a high-gain lunchbox head with two channels, a trio of 12AX7 valves in the preamp and two 6V6s in the power ...

The practice amp is changing, too. No longer just a simple transistorised setup with a 3-band EQ and digital reverb if you're lucky – now some kind of modelling tech is de rigueur. And it is getting ...

The AMPLIFi from Line 6 is a guitar amp and Bluetooth speaker in one. The system also comes with an iOS app that offers more functionality and control, and can even suggest matches for the tone of ...

Guitar amp models are just the beginning: With 24 guitar cabs, 98 stompbox and studio effects, 28 bass amps, 22 bass cabs and six vocal preamps – POD X3 comes complete with the all-around sonic ...

The basic electronics are ridiculously simple (given the sweet, sweet outcome). Just plug two op amp breakout boards together in series, stick a guitar at one end and a speaker at the other. Check out ...

VideoIt really was all about volume for Jim Marshall, the legendary guitar amplifier guru who passed away at the age of 88. The movie This is Spinal Tap poked fun at the guitarist's never -ending ...

The design is inspired by the guitar amps of the 1950s and 1960s so it’s not for audiophiles. The circuit is a pretty conventional single-ended one with a two stage double triode preamp and a ...