The Power Tuned Z315 ESP is a 15-inch subwoofer from DD Audio. This subwoofer comes from the remarkable Z-Series, which continuously pushes the boundaries of car hi-fi. With its open neodymium motor, high-quality components made in the USA, and innovative improvements such as increased excursion and optimized heat dissipation, the Z315 ESP takes the listening experience to a new level. Every detail, from the black oxide finish and red anodized accents to the unique production number, ensures a distinctive design. The Z315 ESP also comes with the Evolution Subwoofer Package (ESP), designed for maximum performance in its size class. Let yourself be inspired by the possibilities of this subwoofer.

Features

• 38cm (15 inch) subwoofer including DD Audio merchandise package!
• Power handling (RMS): 4000 watts
• Peak power handling: 8000 watts
• Voice coil diameter 3.35 inches (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 hi-fi 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 N48 grade, just like its big 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 models. 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 greater variety of system configurations.

The striking look of the Z is characterized by a black oxide finish 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 each 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 also come 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.

ESP Subwoofer Features:

• Carbon Fiber Blend Cone (CFB) - The CFB composition uses an effective 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 for specific performance characteristics, e.g., high definition, power handling, X-stiff control.
• Super-Frame (SFrame) - Maximizes the 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.