Quantec is a German professional audio manufacturer based in Munich, best known for inventing one of the first practical digital room simulators. The original Quantec Room Simulator (QRS), introduced at the 1982 AES Convention in Montreux, modeled the acoustic resonances of physical spaces rather than relying on the comb-filter and all-pass topologies common to other early digital reverbs. The unit became a fixture in major recording studios through the 1980s and is still sought after on the used market for its dense, grainy ambiences on drums, vocals, and guitars.

The company's current product line centers on the Yardstick 249x series — slim, 1U rackmount room simulators built around a modernized version of the QRS algorithm. Variants include the stereo 2492 (digital AES3 I/O), the analogue-I/O 2493, the stereo/surround 2496, and the multichannel 2498. Reverb times range from a fraction of a second to roughly 100 seconds, controlled through a relatively small set of parameters tied to room volume and absorption.

The QRS algorithm has continued to influence other developers: Apple licensed it for the QRS and YardStick reverb models in Logic Pro, and third parties such as Relab Development have released software emulations. The original hardware is associated with records from artists including Peter Gabriel, who has spoken publicly about using the QRS during his 1980s work.

Quantec has 3 products cataloged on Equipboard, including Effects Processors. Their gear is featured by 9 artists, with the strongest followings in Electronic, Rock, and Pop. Notable users include Jimmy Edgar, Aphex Twin, and Steve Albini.