In addition to instrumental testing, the samples produced in the laboratory are subsequently used for a series of tests, in co-operation with the customer, these tests range from installation testing to dimensional compatibility, as well as verifying the system's acoustic performance. Final adjustments of acoustic performance, which will be experienced and assessed directly by the end user, can still be made by fine tuning and implementing minor changes in this way the final characteristics of the manufactured product can be set.

Sound is evaluated by tests using instruments and through a series of listening sessions carried out by specially trained engineers. Carefully selected pieces of music are used in order to highlight specific features of the audio system's acoustic performance.

The listening tests are also compared with audio recordings that have been made in a reference environment, such as a specially equipped listening room.