The Power Tuned 9915b ESP is a 15-inch subwoofer from DD Audio. This subwoofer offers a unique combination of Carbon Fiber Blend Cone (CFB), Vario-Density Extended Range of Motion Surround (V-ROM), and Tuned Spider System (TSS). All these features provide incredible bass performance and dynamic sound reproduction. With an RMS power handling of 2500 watts and a peak power of 10000 watts, this device delivers the ultimate sound experience. Additionally, the subwoofer can be supercharged to produce an even tighter and cleaner bass across the entire power range.

• 38cm (15 inch) Subwoofer
• Power Handling (RMS): 2500 Watts
• Peak Power Handling: 10000 Watts
• Impedance Options: Dual 1 Ohm or Dual 2 Ohm
• Patented Ferrite Magnet System
• Lossless Linear Suspension
• Ribbed Foam Surround
• Magnet Protection Cap including grille over the pole vent
• Aluminum Die-Cast Basket

Specifications

• Frequency Response
• 10Hz - 500Hz
• DC Resistance (Re) 0.9 Ohm
• Resonant Frequency (Fs) 34.32 Hz
• Mechanical Q (Qms) 6.55
• Electrical Q (Qes) 0.42
• Total Q (Qts) 0.40
• Equivalent Volume (Vas) 54.38 L
• Xmax ±22mm
• Magnet Weight 1500 Oz
• Voice Coil Diameter 4 inch (101.6mm)

The SuperCharge Option

• With the Supercharge option, you hear an even tighter and cleaner bass across the entire power range.
• What exactly happens during SuperCharging? By adding a specially shaped neodymium shorting ring on a flush-cut pole piece, with opposite polarity facing down, you redirect otherwise lost magnetic energy into the voice coil gap. This increases the usable motor strength by 20-25%, so smaller, lighter motors have the same drive energy as larger motors.
• You cannot run a SuperCharged subwoofer at higher power and the SPL does not increase, but you hear a cleaner output at higher levels. SuperCharged subwoofers use the power you give them more efficiently, but you still have the same heat dissipation and the same voice coil area. This means the power handling is the same as the standard model.
• Note: Supercharge subwoofers are made to order. Delivery time is 4-6 weeks in addition to the stated delivery time.

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 a 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 the spider diameter, cone diameter, and suspension excursion, acting as a secondary shorting ring and providing additional heat dissipation for better heat flow from the coil.
• SuperCharge Option available