Premium-performance 2-ohm subwoofer.
The JBL® MS-12SD2 is a high-performance, high power-handling, dual voice-coil subwoofer designed to create smooth, powerful bass in your car. The subwoofer’s dual 2-ohm voice-coil design, with 1,800 watts peak power handling, allows for a wide variety of connection options. You can use this sub with any amplifier that can deliver appropriate power, such as the JBL MS-A5001 digital signal-processing amplifier. The sub features advanced components that include rigid polypropylene cones, stitched tri-laminate surrounds, vented magnet assemblies and non-magnetic, cast-aluminum frames.
JBL engineers designed the MS-12SD2 premium subwoofer to produce exacting, forceful bass from an amplifier capable of delivering up to 1800 watts of power. The MS-A5001 digital signal-processing amplifier, part of the JBL MS Series, is an ideal power partner for the MS-12SD2.
The MS-12SD2 subwoofer features a rigid polypropylene cone that is lightweight but stiff enough to move air effectively without flexing. The result is a low-frequency diaphragm that reduces unwanted mechanical distortion under movements up to its linear-excursion (Xmax) limits.
The stitched tri-laminate surround on the MS-12SD2 subwoofer features dual stitch lines for a robust connection to the cone. The material is uniquely able to control the cone’s movement and dampen any vibrations that originate in the frame and mounting surface from reaching the cone. The result is precise control and excellent bass at low or high volumes.
The cast-aluminum frame on the MS-12SD2 subwoofer ensures a rigid chassis for the sub’s moving parts. Since cast aluminum is nonmagnetic, the sub’s magnetism is focused on the voice coils to control the cone’s rapid, piston-like movement and reproduce even the most complex bass sounds faithfully. Cast aluminum also dissipates heat efficiently and hence provides reliable power handling.
All MS-12SD2 subwoofers include a vented magnet assembly to let the voice coils breathe. This feature reduces the probability of power compression in systems playing loudly over a long period. It means an efficient use of amplifier power so that all the power delivered to the subwoofer is directed to the voice coil and not wasted as residual heat.
Dual voice coils on MS-12SD2 subwoofers offer the best range of wiring and system configuration options to optimize the amplifier’s output load. When you’re using multiple subwoofers, the dual voice-coil configurations allow dual, triple and even quad MS-12SD2 subwoofer designs to optimize the amplifier load for maximum power output.
MS Series subwoofers provide amazing bass from modest enclosure volumes. For the 12-inch (300-millimeter) MS-12SD2 sub, we recommend a respectable 0.95 cubic feet (about 27,100 cubic centimeters) sealed enclosure or 1.7 cubic feet (about 48,100 cubic centimeters) vented enclosure. Since vented enclosures provide greater output than sealed enclosures given the same power, the vented-enclosure option will work with smaller amplifiers.
The MS-12SD2 subwoofer features spring-loaded connection terminals for both voice coils, ensuring ease of connection for a variety of wire-gauge sizes. The subwoofer’s push terminal also makes easy work of connecting series or parallel voice coils, or wiring to other subwoofers.
The JBL MS-A5001 digital signal processing mono amplifier is an ideal companion to one or more MS-12SD2 subwoofers. Add an MS-8 digital integration processor to the sound system, and listen to the speakers come alive, blend seamlessly with the sub and provide an in-vehicle sound experience that’ll rival great home audio experiences. JBL engineering has once again delivered excellence in an MS Series product.
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