The Line 6 Spider IV is a versatile modeling guitar amplifier series introduced around 2009–2010, designed to emulate various classic and modern amplifier tones. Key features include amp models, built-in "Smart FX" (chorus, delay, reverb, etc.), 3-band EQ, and artist/song-based presets. The 15-watt model is a popular, compact, and affordable home practice option.
eBay