The HPSM is a reference-grade sound pressure level meter built for car audio, reading the real pressure your subwoofers move inside the cabin and converting it to dB SPL. It uses an automotive-grade pressure sensor rather than a microphone, so nothing overloads or distorts at competition levels, and it is tuned for the roughly 30 to 60 Hz band where car audio SPL is won and lost.

With headroom from around 130 dB daily-demo levels through 180 dB and beyond, a remote sensor pod on a cable lets you sample cabin pressure exactly where you want it while keeping the meter where you can read it. The bright 1.75-inch AMOLED touchscreen shows live SPL, your peak, and the menus, and paired with a WVC base station your number streams to your bass knob, RTC, WDD-LITE, BassWatch, and phone.