The results of a process of designing, building, and "de-bugging" two replacement language laboratory hardware systems at Concordia University (Montreal) are described. Because commercially available systems did not meet specifications within budgetary constraints, the systems were built by the university technical department. The systems replaced were a multiple source, dial-access type, audio-active laboratory system and a cassette type student recording laboratory. The new audio-active system consists of 24 rack-mounted computer type cassette decks and a Umatic videodeck. The 19 student booths have video monitors, with controls provided for students and teacher. External telephone access is provided to one pre-chosen cassette deck. The cassette type recording laboratory has been rearranged so that all cassette decks are located behind the teacher's desk; the wing-chair type student booths are located in 2 blocks with 11 booths per block. The student booths in the recording laboratory are equipped so that the students may record from the master track the student is following, or from a main source deck. Student controls were kept as simple and rugged as possible. Teacher controls avoided micro-computer terminals. Both systems were within the budget and have been working satisfactorily. (AMH)