Under $300, the best value in guitar amps is overwhelmingly in the digital/modeling space. The Boss Katana 50 MKII dominates this price range for good reason — it sounds incredible, has built-in effects, and can go from bedroom volumes to small gig volumes.
If you want a tube amp at this price, look for the Bugera V5, Monoprice 15W, or the Fender Blues Junior III (if you are patient and find a deal). Small tube amps in the 5-15 watt range deliver authentic tone at volumes that will not destroy your hearing.
Solid-state and modeling amps at this price include the Fender Champion series, Orange Crush series, and Line 6 Spider. While purists may prefer tubes, modern modeling amps deliver 95% of the tone at a fraction of the cost and maintenance.
