The DD Audio Power Tuned Z318 ESP is a high-quality 18-inch subwoofer that redefines the limits of car audio with its innovative features. Since its initial launch in 2005, the Z-series has continuously evolved to consistently meet the demands for outstanding sound quality. With impressive technical features such as a powerful neodymium motor and a specially developed free-flow cooling system, the Z318 ESP delivers excellent audio performance. It also offers a custom design highlighted by black oxide layers and red anodized accents. The DD Audio Power Tuned Z318 ESP is more than just a subwoofer – it is a statement of unmatched sound and top-tier quality.

Features

• 46cm (18 inch) subwoofer including DD Audio merchandise package!
• Power handling (RMS): 4000 watts
• Peak power handling: 8000 watts
• Voice coil diameter 3.35 inch (8.50mm)
• Impedance options:
• Dual 1 ohm
• Dual 2 ohm
• Dual 0.5 ohm
• Dual 1.5 ohm
• Patented neodymium magnet system
• Lossless linear suspension
• Ribbed foam surround
• Magnet protection cap including grille in front of the pole vent
• Aluminum die-cast basket

In early 2005, the first generation of the Z motor was launched. It forever changed the way people thought about a high-performance subwoofer and pushed the boundaries of car audio to new extremes. Over the years, many versions of the Z motor have been produced, and this spirit of experimentation has driven DD to constant improvement and innovation.

The Z3 series uses an impressive open neodymium motor with 13 lenses of grade N48, just like their bigger brothers in the Z4 series. The steel motor parts from the USA are machined in DD Audio's hometown OKC, and all moving parts are made in the USA from the best available materials and manufacturing methods.

The current Z models feature several structural improvements over earlier versions. DD was able to overcome structural saturation values and increase peak and total flux levels by allowing more energy to flow through our magnet lens architecture via more efficient flux paths, tighter lens alignment, and converging flux lines.

The free-flow cooling system was improved by installing longitudinal pole vents to increase airflow to the voice coil former. Then DD increased the thermal mass and applied heat-absorbing coatings in target areas to support long-term heat dissipation.

Additionally, DD made geometric changes that allow for increased maximum excursion and a wider range of system configurations.

The striking appearance of the Z is characterized by a black oxide layer combined with red anodized accents. The motors are also adorned with custom CNC-engraved designs, and each motor is engraved with its production number, making every part unique.

You will notice that the standard Thiele/Small parameters for the Z series are missing. This omission is intentional, as each Z is custom-built, allowing for zillions of possible parameter sets, making a static set of specifications very prone to inaccuracies.

The Z-series subwoofers are also equipped with the Evolution Subwoofer Package (ESP). Drivers equipped with ESP feature larger diameter suspensions and deeper frames than standard subwoofers, as well as exclusive surround and cone designs. ESP subwoofers are truly built to maximize performance in their respective size class.

The Z series comes standard with an oversized dust cap made of black composite in dry construction, a red logo, and a treated paper cone, but can optionally be equipped with a custom suspension configuration, alternative composite dust caps, composite cones, powder-coated frames, and a variety of logo options to give your subwoofer a custom look and/or additional performance for a specific application.

• Carbon Fiber Blend Cone (CFB) - The CFB composition uses a powerful carbon fiber-based cocktail to provide you with the highest strength-to-weight ratio in the industry.
• Vario-Density Extended Range of Motion Surround (V-ROM) - Offers ultimate linear control at high excursion while enabling dynamically sounding bass reproduction. The control ribs are compressed to a lower density than the main surround body to allow a seamless control system. The harder you control it, the more control you get.
• Tuned Spider System (TSS) - Each suspension is tuned to specific performance characteristics, e.g., high definition, power handling, X-stiff control.
• Super-Frame (SFrame) - Maximizes spider diameter, cone diameter, suspension excursion, and thus acts as a secondary shorting ring and provides additional heat dissipation for better heat flow from the coil.