This patent has been developed over many years of building and testing prototypes based on the closed box and bass reflex styles.
The key feature is the close proximity front baffle and the moving element acting as a piston to compress air in the cavity.
This layout is extremely effective in dampen the normal resonance of a closed box design.
In this sub bass design the driver has a ‘flat face’ which was proved to produce the most outstanding performance within its specific ‘frequency and power range’.
The effect is to flatten the response and extend it over a wider sub bass range, typically from 20HZ to 150HZ with greatly reduced harmonic colouration.
At a given power input level, the sound leaving the wave guide is at much higher pressure than that from the port of a bass reflex design. The resulting sub bass is clean, firm and remains audible at a surprisingly low power input level.
The enclosure vibrates less than the normal closed box because the air pressure between the front baffle and the ‘flat face’ driver dampens the length of travel, resulting in less energy being transferred to the main cavity.
This unique approach produces very deep bass at modest power levels and is particularly attractive for a noise restricted environment.