Founded on January 1, 2011 by Patrick Quilter, Quilter Labs is a guitar amplifier and effects company based in Irvine, California. Pat Quilter co-founded QSC Audio (originally Quilter Sound Company) in the late 1960s and spent over four decades designing high-power pro-audio amplifiers before turning his attention back to his original passion: guitar amps. Quilter Labs specializes in lightweight, high-power solid-state amplifiers engineered to deliver the dynamic feel and harmonic warmth typically associated with tube amps, using proprietary Class-D technology refined during Quilter's years at QSC.

The company's product range spans pedalboard-friendly amp heads like the SuperBlock US and SuperBlock UK, compact combo amps in the Aviator series (including the Aviator Cub and Aviator Mach 3), and rack-style heads such as the Tone Block 202 and OverDrive 202. Quilter Labs also offers the Travis Toy Signature Edition steel guitar amplifier and the budget-oriented 101 Reverb. In 2023, the company partnered with Neunaber Audio — whose founder Brian Neunaber also has roots at QSC — to develop digital effects products under the Quilter Labs umbrella, resulting in the Elevate effects platform and a line of DAW plugins.

Quilter Labs has built a strong following among working musicians and gigging guitarists who prioritize portability and reliability without sacrificing tone. The brand's amplifiers are known for packing significant wattage into remarkably small, lightweight enclosures, making them popular choices for players who need professional-grade volume and headroom in a travel-friendly format.

Quilter Labs has 66 products cataloged on Equipboard, including Combo Guitar Amplifiers, Guitar Amplifier Heads, and Guitar Amplifier Cabinets. Their gear is featured by 31 artists, with the strongest followings in Rock, Jazz, and Pop. Notable users include Kerry McCoy, Mike Sullivan, and Michael Sweet. Most Quilter Labs products fall in the mid-tier range — professional-grade without flagship pricing.