Stephenson Amplification is a boutique builder of hand-wired tube guitar amplifiers and effects pedals based in Parksville, British Columbia, Canada. Founded by Mark Stephenson, who built the first amp bearing his name in 1997, the company has remained a small one-man operation producing custom-ordered amps with a multi-month backlog.

The lineup centers on a handful of point-to-point wired tube heads and combos, including the Standard (a clean-leaning amp that breaks up through power-tube saturation), the high-gain Deluxe (often described as Trainwreck-inspired), the Dual-Plexi (offering both 65 and 68 Plexi voicings), the Custom Reverb Combo, and the B-100 bass amp. Stephenson is also known for the Stage Hog, an unusually compact pedal-sized tube amp, alongside outboard pedals such as the Fix My Duck and the Stephenson Booster.

Stephenson amps incorporate power-scaling technology licensed from Kevin O'Connor of London Power, allowing players to drive the output stage hard at lower volumes. The brand has built a niche reputation among tone-focused players in the boutique tube-amp community, with notable customers including John Fogerty.

Stephenson has 2 products cataloged on Equipboard, including Guitar Amplifier Heads and Electric Basses. Their gear is featured by 1 artist, with the strongest followings in Rock. Notable users include Ian D'Sa.