As a DSP speaker, there is an internal sampling rate. We have used 96 kHz which is already double what most of our competitors use (48 kHz). The sample rate limits the high frequency extension of the system to just below half the sample rate, i.e. <48 kHz. The measured high frequency roll-off is 41 kHz (-3 dB) / 45 kHz (-6 dB) for all five models.