The impact on overall "phase" in the sound system is especially important. A phase for a wave and given moment in its position in the cycle is a measure of the change of the signal waveform. Basically, there will be a phase in each equipment and transmission wire where the mismatch between devices would create the phenomenon known as "phase lapse". This is especially the case with analog signal transmissions, which are extremely vulnerable to interaction between the equipment, with the subject visual producing a ghost image. Hence, the overall sound will become cloudy, and greatly affect the level of clarity.

BTL makes great effort in research of this phenomenon and with the deployment of computer programs to carry out large number of precise calculations, this enables BTL products to adhere to structured specifications and strict quality controls in its production materials. This is to ensure the elimination of the phase lapse problem, letting the transmitted signal to complete the transfer, in turn unleashing the signal's true nature.