He also avoided high-order filters because he believed they often required drivers be wired electrically out-of-phase and, in his opinion, had inferior stereo imaging.

In this sense, VMPS speakers did not follow a conventional design philosophy which strived for a "flat" frequency response within a set tolerance, e.g. ±2.5 dB.

Thus, he felt that flat frequency response was both unnecessary and practically impossible to achieve, unlike the vast majority of other speaker designers throughout audio history.

The VMPS bass management system used one or more high-compliance down-firing passive radiators that was tunable by adding or removing putty from the diaphragm.

Brian Cheney would frequently visit a customer's home, often at his own expense, to optimize the sound of the speaker system in the listening environment.

[5] This design was licensed to Level 9 and manufactured in Canada and later China and sold as Monsoon computer speakers[6] with a subwoofer.

[7] Brian Cheney invented and patented[8] a Constant Directivity Wave Guide (CDWG) to increase the horizontal dispersion of the planar mid-range and tweeter.

To achieve optimal sound quality, the set-up process required the listener change the mass of the PR by adding or removing Mortite putty from the cone.

The low moving mass reduced the gravity sag of the PR cone and allowed it to be mounted on the bottom of the speaker cabinet and fire downward in a loaded slot.