What is the delay (latency) through the loudspeakers?
For a digital AES/EBU input, the delay is 3.75 – 4.5 ms (>400 Hz), depending on the sample rate (shorter delay for higher sample rate). For an analog input the delay is fixed and is about 4 ms. So the delay through the loudspeaker using digital or analog inputs is about the same, and short enough for musicians to do live tracking, as well as significantly shorter than half a video frame. Such loudspeaker latency should hence not be a problem for most practical applications. On a more academic note: These DSP loudspeakers (like all analog loudspeakers) have an increasing delay towards low frequencies. The loudspeaker delay increases below 400 Hz because the loudspeaker is a minimum-phase high-pass system and all such systems exhibit an increasing delay towards low frequencies. The limit of 400 Hz is there because the human auditory system is not very sensitive to the system throughput delay increases at low frequencies while in mid frequencies delay variation as well as absolute delay c