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NEP Audio

4,000W MAX NEP Authority v2 LFS Subwoofer (Serious Lows)

Regular price $389.99 USD
Regular price $649.99 USD Sale price $389.99 USD
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Our new designs have shifted the emphasis to natural system acoustical gains over driver efficiency in free air. The "Unusual" looking T/S specifications shows where the shift in design philosophy has taken us. We are able to extract system efficiency along the frequency range that you want a subwoofer to operate in. This is true for all of our subwoofers. Each of our subwoofer lines has a different reason for being. Some focus on lows, some on more musical bass...

Take the Team Series 18" as an example. This chart shows the natural frequency response of an NEP Audio Team Series 18" subwoofer in a simple 7 cu ft. ported box tuned to 24Hz in half space without any filtering. There is a huge gain over the entire frequency responce that our sub is going to operate in. When put into a vehicle, the cabin gain will be on top of the gain we have already given the sub, and it ends up having a rather flat response when the two gains combine. Traditional designs are leaving a massive amount of acoustic power off the table.

10'' / D1

Subwoofer Specifications

Fs: 31.4Hz
Qes: 1.06
Qms: 4.77
Qts: 0.87
Vas: 2.78 L
Mms: 220.0g
Bl: 9.06T-m
Sd: 241.9cm²
Re: 1.99Ω
Xmax: (One Way) 26.4mm
Power (RMS): 1500W
Power (MAX): 3000W

10'' / D1

Enclosure Recommendations

Sealed Box Sealed Box
1.0 ft³
Ported Box Ported Box:
2.0 ft³
30.0 Hz
Assembled NEP Subwoofer Unit Weight:
40.0 lb
Unit Displacement:
0.108 ft³
NEP Subwoofer Depth Cutout Diameter:
9.25 Inches
Mounting Depth:
8.25 Inches

10'' / D1

Subwoofer Details

NEP Dust Cap Large Diameter Molded NEP Dust Cap
NEP Cone and Surround Type non-pressed pulp cone with half roll surround
NEP Spider 8.5 Inch, 3 Layer custom nep nomex spider with triple leads, progressive
NEP Audio Voice Coil Type 3 Inch Black Flatwound Aluminum Wire on Aluminum Former.
Subwoofer Basket Ti Basket
Top Plate Thickness Top Plate Thickness:
18.0 mm
NEP Magnet 2x 7.0 Inch Y35 magnets

The All New NEP LFS Subwoofer is built at our facility in Connecticut.


LFS means Low Frequency Series. It's almost like a subwoofer for your subwoofer. Would that be a sub-subwoofer? It is a subwoofer for those who like the lows. We mean, really really low frequencies. It shares the same motor as the NEP Authority v2, but that is where the similarities come to an end. The LFS includes a larger basket, 10 inch suspension, and added moving mass for better low frequency performance.

If you are looking for the windy-est ride in town, as an example, put the 15" in a 6 cubic foot box and tune it to 18Hz. Give it full power at 18Hz. This is what these have been designed for.

WinISD Plot of NEP LFS 15D2

For building boxes and looking at frequency responses, we recommend WinISD. It's quick and easy once you learn how to use it, and best of all, it's free! 

1,500W RMS is a conservative power rating. 


  • Contact Us for Assistance with Boxes
  • Final T/S Parameters will be Published Shortly
  • Contact Us to Customize this Subwoofer
  • Recones are Available in our Store 
  • Build time will be 1 to 2 Weeks in standard configuration, and our automated email system will keep you updated for shipping.
These subwoofers are built to order, and we put a lot of care into each one. We guarantee you will be happy with your NEP purchase.
  • Shipping

    We offer discounted shipping rates which can be calculated during checkout

  • Returns (Not Due To Warranty Issues)

    You may return an item in new condition with no questions asked for 13 days after confirmed delivery. Please contact us first!

    We encourage you to get in touch with us if something does not seem right, or if you are not getting the results that you expected. Many times we may have a solution for you that can be given over the phone.

  • Warranty

    NEP Audio offers a 2-Year limited warranty on subwoofers. This covers the workmanship of the product. Accidental damage to any part of the speaker, or burned out coils are not covered under this warranty, but these things can be repaired at the customer's discretion. Please contact us at if you have an issue.