The E-Subs’ subwoofer drivers offer impressive, low-distortion excursion envelopes capable of handling the most demanding program material, or the most delicate. To accomplish this, JL Audio’s exclusive DMA technology is applied to shape, control and stabilise the drivers’ motor strength, ensuring linear behavior over a very long excursion range. Unlike typical steady-state modeling systems, our approach takes into account the dynamic shifts created by current flow and back EMF under real power conditions, with real program material. The payoff offered by DMA optimisation is a driver that more faithfully tracks its input signal at all listening levels, leading to superior bass definition and dynamics.

The extreme mounting depth of the E-Sub driver is very deliberate. It permits wide gaps to exist between the three suspension elements (the rubber surround and the dual spiders), imparting exceptional mechanical stability over the driver’s full excursion range. This further improves linearity, reduces distortion and enhances long-term reliability. In a stroke of engineering elegance, the steel front mounting flange of the E-Sub driver also forms the entire front baffle of the finished product, while the back-plate of the driver is threaded and bolted to the rear wall of its enclosure for support.

To power these drivers, JL Audio engineered a completely new switching amplifier with a regulated, switching power supply. This approach helps make the amplifier more compact, lightweight and efficient, while still delivering ample, clean power to fully exercise the E-Sub driver’s performance envelope.

The amplifier module also incorporates a studio-grade signal-processing section, which is controlled from a panel on the top of the subwoofer cabinet making adjustments on an E-Sub a much more enjoyable experience than adjusting the rear-mounted controls found on most powered subwoofers. An attractive cover is also included to hide and protect the controls during normal use.