These are PA system style wall speaker cabinets of a type often used in schools and office buildings. Speaker drivers were often selected for the clarity of human voice reproduction but were also used for low-fi background music. Hi fidelity drivers were not typically used in these applications with the notable exception of the Altec 755 series of speaker drivers (which started life as the highly sought after Wetsren Electric 755 model).
The important thing is whether you find the sound quality appealing on these particular drivers.