Speakers change timing? Or are you saying something else changes timing. Digital audio is accurate to a nanosecond, vinyl 10's of nanoseconds, phase in speakers uSeconds. Are you telling me that the pace and rhythm of the music is changed by speakers? You realize that is that logical?
Qiuet,Speakers certainly influence the way we hear timing.Especially multi ways where time alignment of the drivers is hard to get right.It sounds slightly out of time because it is.Some designers like Duntech went to a lot of trouble with stepped baffles and crossover design to ensure time alignment.Other speakers like Tannoy dual concentrics have the benefit of physical time alignment .Rise time and impulse response measurements reflect this time alignment.A great many speakers have quite poor time alignment because the acoustic centres of the drivers are out of alignment.Add to that other factors like phase response anomalies due to reverse phase leakage from ports.