The location of the crossover network on the top panel permits easy access to the network switch and input terminals, subsequent to speaker mounting. Six internal .T. nuts allow quick attachment of Omnimount or other mounting hardware without opening the cabinet. Enclosure finish is satin black vinyl, with a dark grey grille.

The Model 8330 offers many of the same design features found in JBL.s prestigious line of studio monitors. The crossover network has bypass capacitors wired in parallel with the larger active capacitor values in the circuit to reduce hysteresis effects on the signal. This provides improved resolution of complex transient waveforms. The woofer and midrange cones utilize a laminated high polymer composite which provides a combination of optimum stiffness, mass, and internal damping to ensure that the cone behaves more like a true piston. The tweeter dome is laminated with vapor deposited titanium in order to obtain both the structural integrity of a hard dome and the damping characteristics of a traditional soft dome. A unique acoustic contact lens is an integral part of the tweeter design, and provides flatter high-frequency response by shadowing the center section of the dome. Built to traditional JBL standards of quality and precision, the loudspeakers are subjected to stringent tests to ensure that the materials and adhesives will stand up to long-term use under adverse conditions.