FredericStevenson Moving Air 1St Automotive Loudspeaker Designed & Engineered In Singapore

Small Woofer No Bass! Think Again.

FredericStevenson innovative design created the small box, high power subwoofer category for automobile and modern home where space is limited. Physics tells us that in order to have high-impact, low frequency bass, a large cabinet was required. However, With the Extreme Excursion e² Subwoofer, music and film enthusiasts could have real bass in a car or bedroom that could never support a large, bulky, old-school subwoofer.

Introducing Extreme Excursion e² Technology

Needless to say, the e² Subwoofer Clarity series is our flagship model. Incorporating twin drivers concept, it produces huge bass from a box a fraction of the size of its competitors. When you first see it, you won't believe it's capable of delivering significant bass. And when you first hear it, you'll search the room to see if someone has sneaked in two of them. Both drivers in the FredericStevenson e² Subwoofer are driven by a common electric motor and magnetic structure. One driver is driven by a voice coil, the other by a defined mass. Both drivers move inward and outward together. The two forces are exactly equal and opposite. The twin drivers contribute equally to the output sound pressure in its chosen operating band.

To be continued: Progressively, I'll explain the issues of Bass Reflex, Closed Box & Bandpass loudspeaker design concepts...what are the common design limitations inherited, etc.

Probably the 1st passive radiator subwoofer system in the car music scene. FredericStevenson brings you loads of fine technology found only in high end audiophile systems. e² technology equates to Extreme Excursion of the cone diaphragm secured in place by high quality wide moulded latex surround material. Powered by high magnetic density magnets. Simply, the cone is able to transverse more axial distance than conventional drivers. Extremely efficient in moving more air!

Innovative Technology – from a tiny cabinet they are able to put out as much bass as an extremely large woofer in a very large cabinet. The secret behind is the custom large excursion drivers. Its in and out movement is approximately five times greater than a conventional woofer. Since it can move back and forth 2inches, it can move lots of air.

Extreme Excursion Vs Classical 15” Drivers

In order to get lots of air displacement we need a very large stroke (long throw) woofer, that is why all FredericStevenson’s subwoofer designs come with "Extreme Excursion“ trademark. π(4)² (area of piston) x 2.5" (Extreme excursion of woofer) x 2 (two drivers in a box) = 201 cubic inches. 201 cubic inches of air displacement is about the same as three or four (depending on their excursion) "Classic" 15" drivers operating in a cabinet the size of a small refrigerator. In practice, it's somewhat less because the excursion damper is set to prevent bottoming.

FredericStevenson e² Technology complements the passive radiator configuration to give you numerous advantages.

Highly recommended to be used with the Clarity 2 way system for best experience.

ACCURATE BASS RESPONSE

+ e² subwoofer drivers minimize unwanted oscillations.

+ Tight controlled bass extension

+ Response is congruent to closed box designs but wins over with superior SPL performance

HIGHEST SPL WITH LOW DISTORTION

+ Highest SPL against other configurations with same input power. + Largest volumetric air movement for best staging experience

+ Low distortion in acoustic transduction when driven hard

SMALLEST BOX DESIGN

+ Requires the least box design volume

+ Occupies minimal space in car boot