Shipping from $8 and capped at $22 to Most Areas (Express Includes Transit Insurance)

P.Audio SD18-1700N 1700 Watt 18 Inch High Output Low Frequency Neodymium Woofer



The SD18-1700N is an very high output low frequency transducer. The 18 inch (457mm) diameter piston will produce extremely high sound pressure levels at very low frequencies and is ideal for high level deep bass and sub woofer response in both live sound and recorded music venues. The operating range is 30Hz to 200Hz. The transducer uses high energy neodymium magnetics to achieve a very high acoustic output to weight ratio.

The SD18-1700N employs a large 4.5 inch(114.3mm) diameter voice coil that provides an AES rated 1700 watts of continuous power handling and a full 6800 watts of peak rated power handling when sufficient amplifier headroom is available. It is recommended that the transducer be loaded into a properly designed vented enclosure and suitable active high pass filtering be employed if extremely high power levels are expected at low frequencies.

The SD18-1700N utilizes P. Audios Auto Balanced Cooling (ABC) technology to not only improve transducer power handling and reliability but to also increase power compression performance by carefully balancing and directing airflow to critical areas. The voice coil design is an inside/outside geometry with P. Audios square wire technology to improve conversion efficiency and provide a very large cross-sectional area for superior cooling. System linearity is achieved by employing magnetic flux demodulation devices in the structure to increase fidelity and sonic accuracy. The system suspension has been designed specifically for high linear displacement and extended low frequency response. The double spider design insures very high displacement and linear response while maintaining excellent control. The cone has been treated with a conformal coating designed to provide additional mechanical damping and moisture resistance. The transducer chassis is a die cast aluminum design that insures a very high degree of structural integrity.

See Downloads tab above for a great single 18 inch horn loaded sub cabinet plan that suits this woofer. We had a good customer of ours build it (see third picture) and he got a fantastic result. He is happy for anyone to call him if they would like to discuss it with him. He'll even build them for you......

  • 4.5” Very Large Format Voice Coil
  • 6800 Watts Peak Power Handling
  • Active Balanced Cooling
  • Neodymium Magnetics
  • Square Wire Inside/Outside Coil Design
  • Double Spider Suspension
  • Integrated Demodulation Rings
  • Die Cast Aluminum Chassis

Warranty: 12 Months

We charge just a $15 per order (capped at $22) flat rate for express shipping*. This covers one delivery attempt so please provide an address where someone is available to sign for courier delivery between 9am and 5pm weekdays. You can instruct us to ask the courier to leave your parcel unattended in a safe place, although please be aware that if anything happens to the parcel, neither us nor the courier company can be held responsible. Work addresses are a great delivery option. If using a work address please include the business' name.

* for some larger items does not apply to Australian remote island locations, some mainland remote locations (outside Darwin NT and Perth WA metro areas) or outside Australia. If unsure if you are entitled to capped shipping it is best to contact us prior to placing order.

** $8 standard shipping available at checkout for orders under $50