Sounds good. Take this freezingly cold 40 F. Most high performance subwoofers use state-of-the-art micro processor controlled amplification these days. SoundGrail. For example, you've tuned the EQ and set levels and delay. The speed of sound calculator displays the speed of sound in water; it's 4672 ft/s. Video. Not everybody knows about the sound speed dependence on the temperature the higher the air temperature, the faster the sound can propagate. The speed of sound is (roughly) one foot per millisecond. Technical & Advanced Car Audio Discussion, /\ 2xUS Acoustics 2080>