The Pignose 7-100 was designed by Richard Edlund and Wayne Kimbell, with Pignose Industries founded in 1972 and the amp officially launched at the 1973 Summer NAMM show — a 5-pound, battery-powered guitar amplifier built around a single 5-inch speaker. At a time when "portable amp" wasn't yet a category, the 7-100 invented it. The volume knob doubles as a power switch. The overdrive is built into the all-transistor circuit, not bolted on.

Its gritty character and natural compression caught the attention of Frank Zappa, who used a modified Pignose for the dirty guitar tones on Apostrophe(') and Over-Nite Sensation. Eric Clapton tracked his 1974 cover of "Motherless Children" entirely through one, and Joe Walsh recorded the rhythm parts of "Rocky Mountain Way" with a Pignose as well. Pushed hard, the small solid-state circuit produces a compressed, mid-forward breakup that larger amps simply cannot replicate. It became a studio staple for exactly that character.

This free IR was captured from that same 1×5″ speaker, close-miked with a Neumann U47 FET — a single mic, no EQ, no compression. Just the raw acoustic output of the most legendary portable amp of all time, ready to drop into your signal chain.