TPT is a new variation on transmission-line loading, delivering deep bass without the ‘boom’ that can result from traditional reflex-port loading.
In many loudspeaker designs, room modes are easily excited by forward- or rear-firing reflex ports, which can cause audible resonance at certain bass frequencies. Whilst this can give the impression of a powerful bass response, the resultant ‘boom’ masks other low frequencies, making bass sound slow and poorly defined. Instead, the TPT system utilises the internal volume of the cabinet to extend bass response, delivering a smooth and even result that augments the main bass driver’s output perfectly.