Landgraff is a boutique effects pedal builder based in Pensacola, Florida, founded in 1999 by John Landgraff and his wife Roselyn "Rose" Landgraff. Operating out of their home as Landgraff Custom Amps & Pedals, the couple hand-wired each unit using point-to-point construction with socketed components, allowing them to voice and tune every pedal individually rather than producing in batches.

The brand's best-known circuit is the Dynamic Overdrive (often called the DOD), a three-knob overdrive built around the JRC4558 op-amp with a three-way clipping toggle offering symmetrical diode, asymmetrical, and LED clipping options. The lineage also includes the MO-D Distortion, the D.B. Distortion, a Distortion Box, clean boosters, and blues boxes, each following the same hand-built approach and typically finished with distinctive swirl-painted enclosures signed and numbered by the builder.

Landgraff is widely credited as one of the pedals that helped define the "boutique" category, with production numbers estimated in the low thousands over the life of the shop. After John Landgraff's death in May 2015, Rose continued building pedals using the same point-to-point methods, and original units — particularly signed examples — remain heavily sought after on the secondary market, frequently commanding prices well above their original retail.

Landgraff has 3 products cataloged on Equipboard, including Overdrive Effects Pedals and Distortion Effects Pedals. Their gear is featured by 3 artists, with the strongest followings in Rock, Blues, and Funk / Soul. Notable users include Guthrie Trapp, Tom-H@ck, and Shane Diiorio.