Ascendant Audio SMD 15″ Subwoofer

Code: AA-SMD-15

Designed to be the ultimate subwoofer available, the 2015 SMD Series of subwoofers are the finest high power subwoofer ever made.


In Stock

Ohms *


There is a 14-28 working day delivery on this product.


This item cannot be shipped to UK, Germany or the Netherlands.


Designed to be the ultimate subwoofer available, the 2015 SMD Series of subwoofers are the finest high power subwoofer ever made. Steve Meade is the biggest force in the automotive audio industry and Ascendant Audio has worked with him for many years on his various systems and subwoofer needs. As a joint project, the new SMD Series is a progression from the last version increasing overall capability.


Starting with the insane Super-Gauss motor we have revised the geometry to get even more motor force than ever before. Simply put, with dual flux path loops we can increase the motor strength through the secondary loop where a standard design can not. This technology results in smoother flux flow, decreased saturation, and overall increased linear performance. With the rigid foundation of the 6 spoke aluminum frame to hold it together, we have added our venturi cooling and central flux plate cooling channels to keep the coil functioning under high power conditions. With higher power handling and linearity, the 2015 SMD series is the new reference for both sound quality and brutality.

  • The Ultimate Subwoofer
  • 15″ and 18″ Dual 1 and Dual 2 Ohm models
  • FEA derived Super-Gauss motor
  • Unique dual flux path design
  • 4″ 4 layer monster aluminum coil
  • FOAD Lead Wire System
  • Triple layer reinforced collar
  • Four extreme compliance 10” spiders
  • Ultra rigid reinforced cone body
  • Hybrid foam surround
  • 6 spoke cast Aluminum basket
  • Wrap round rubber gasket
  • Carbon Fiber Dust Cap
  • 5000W RMS

Thiele-Small Parameters

SMD 15 SMD 18
Coils Dual 1 Ω / Dual 2 Ω Dual 1 Ω / Dual 2 Ω
Re 0.7 Ω / 1.4 Ω 0.7 Ω / 1.4 Ω
Fs 35.5 Hz / 34.1 Hz 33.7 Hz / 34.2 Hz
Qms 5.92 / 5.87 6.89 / 6.82
Qes 0.28 / 0.28 0.33 / 0.33
Qts 0.27 / 0.27 0.32 / 0.31
Mms 645 g / 634 g 743 g / 724 g
Sd 810 cm^2 1210 cm^2
Vas 31.47 l 61.32 l
SPL 88.2 / 88.3 1W/1m 90.2 / 90.4 1W/1m
Bl 26.01 / 36.79 Tesla Meters 26.01 / 36.79 Tesla Meters
Xmax 35mm (one-way) 35mm (one-way)
RMS 5000w 5000w

Technical Specifications

SMD 15 SMD 18
Mounting Depth 14.250″ 15.000″
Cutout Diameter 14.125″ 16.750″
Overall Diameter 15.625″ 18.500″
Driver Displacement 0.24 cuft 0.26 cuft
Driver Weight 125 lbs 138 lbs

Recommended Enclosures



SMD 15 SMD 18
3 – 5 cuft @ 33HZ
5 – 8 cuft @ 33HZ
For ported enclosures use 12-16 square inches of port area per 1 cubic foot of volume.


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Additional information

Weight 57 kg
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UK Delivery

All items ordered before 14.00pm are shipped the same day unless otherwise stated at the time of ordering. Orders placed after 14.00pm on a Friday will be shipped the following Monday (excluding bank holidays, in which case it will be the next working day). If the item is out of stock for whatever reason you will be emailed within 24hrs to inform you of this. Our site manages stock inventory so if it says ‘IN STOCK’ that means goods are available for immediate dispatch.

  • Shipping will be calculated at the checkout.
  • Free shipping available for customers in the UK mainland ONLY when orders are over £50.
  • We use Interlink Express for all UK next day deliveries (aswell as for orders over £50 if the weight exceeds 2kg) and Royal Mail Recorded Post for orders under 2kg.

Make sure you supply us with a mobile number when you order, then we can give you full tracking information & updates on your order throughout the process.

Clicking on the above image, will also allow you to track your order online. If you have any questions or queries, contact our helpful office team on

Free Delivery

Free delivery is available to UK mainland addresses ONLY and excludes addresses in the Scottish Highlands & Islands and Northern Ireland. Free delivery is applicable to orders over £50.00 (inc vat) ONLY. This offer doesn’t necessarily mean your goods will be sent on a courier next day service. However assuming the weight exceeds 2kg your goods are usually sent via courier (Interlink Express).

Guranteed 24 Hour

  • Next Day Delivery – Over £50 Inc. VAT – Any weight – Free!
  • Next Day Delivery – 2-5KG – £8.00
  • Next Day Delivery – 5-20KG – £9.99
  • Next Day Delivery – 20-30KG – £11.99
  • Next Day Delivery – 30-40KG – £15.00
  • Next Day Delivery – 45KG+ – £50.00


  • Royal Mail 1st Class Recorded 1-3 working days – Upto 1KG – £4.45
  • Royal Mail 1st Class Recorded 1-3 working days – Upto 1-2KG – £6.90
  • Royal Mail 2nd Class Recorded 2-5 working days – 0-2KG – £3.95


  • Royal Mail Special Delivery Saturday – Upto 2KG – £14.00
  • Courier Saturday – Upto 5KG – £15.95
  • Courier Saturday – 5-20KG – £19.95
  • Courier Saturday – 20-25KG – £22.95

Orders MUST be made before 2pm Friday

Back Order

Items that are listed with ‘Back order’ usually means there is around a 5-10 working day delay for the item to be back in stock. Some items are listed in this way as they are a low volume product and are considered special order with our suppliers.

European & International Delivery

Blade ICE ships internationally to many countries in Europe. Based on the weight of your order shipping will be calculated at the checkout.

Blade ICE reserves the right to charge the full shipping fee applicable to resend if the item is returned to us as the customer was unable to take delivery of the parcel for any reason. Courier returned items will be added back into our stock and your account credited with the order total, minus the fee the courier charges us to deliver the item back to us. You will have to re-place the order to have the item reshipped. If a customer inputs any incorrect details on their order, which causes the parcel to be delivered incorrectly, we will not hold any responsibility for this parcel.

Finally we advise you to check the contents of the order with the inventory sent with the goods. In the rare instance that goods are missing, please contact us within 24 hours and we will happily send out the missing goods at no extra cost to you. If goods are damaged or faulty please inform us within 3 working days of receiving your order.

Please refer to our Terms and Conditions for more information.