The members of Concanentes perform on copies of instruments from 12th-16th centuries. Evidence collected from paintings, carvings and descriptions of the time is used by makers to try (as far as possible) to reproduce instruments in an authentic way.

Some of the instruments used by the group:

Vielles by Owen Morse-Brown based on various medieval carvings and paintings.

Medieval symphonye by Chris Allen and Sabina Kormylo - inspired by 13th century carvings, stained glass windows and paintings.

5-course medieval lute by Steven Barber is based on geometrical drawings by Arnold von Zwolle in his treatise (1440) which is in the Bibliotheque Nationale, Paris, Ms. Lat. 7295.

Gitterns by Steven Barber based on various medieval carvings and paintings.

Oud (maker unknown) was purchased in Cairo.
Saz (maker unknown) was purchased in Turkey.
Both the oud and saz are by makers from the present-day Arabic musical tradition. These instruments look identical to those depicted in one of the 13th-century sources of Alfonso el Sabio's Cantigas de Santa Maria, Escorial ms b.I.2. (so-called 'Códice de los Músicos'). Although as Western music developed these instruments ceased to be used in Europe, their use continued in the Arabic world and today they are still central to Arabic classical music.

Harp by Alice Margerum, has 19 strings and is based on 12th century English sources.

Recorders by Thomas Prescott after 17th century instruments in the Vienna Kunsthistorisches Museum.

Doucaine by Korber after a 16th century instrument described by Johannes Tinctoris (c1435-?1511).