Out of stock

SSD Series

$335.00 $259.00

Handmade in USA
Due to COVID-19 all orders can have upto 45 business days lead time


The new SSD Series of subwoofers is our all around daily sub.

SKU: SSD Categories:

The new SSD Series of subwoofers is our all around daily sub. Utilizing our new water jet we are cutting the top plates and back plates in house as well as final machining.  This new design uses a 3 stack of high grade ceramic ferrite magnets for more force and increased reward clearance over the previous model.  Now with the option for our Heli-cool system using our billet machined solid pole, the cooling capability has been massively increased. Along with triple progressive spiders, a multilayer foam surround attached to a fiber impregnated kraft pulp cone helps keep things under control in high power applications. The standard 3″ 4 layer copper voice coil has increased to 22mm of Xmax.  With this new geometry we will also offer a high Xmax coil that has over 30mm of Xmax.  Light weight and versatile, the SSD works in a variety of applications from incredibly detailed sound quality systems, to ground pounding multi sub monsters. The SSD is versatility redefined.

  • Dual 1 and Dual 2 Ohm

  • Cast basket

  • Wrap around gasket

  • Kraft pulp fiber reinforced cone

  • Multi-layer wide foam surround

  • Push terminals

  • FEA optimized motor design

  • Carbon cap standard

  • Extra heavy lead wire

  • Water jet and machined in house from US steel

  • Standard copper 3” diameter 4 layer coil

  • Triple high grade magnet

  • Progressive spiders (standard 7″ or optional 8″ with integrated lead)

  • Optional Heli-cool system
  • Flatwind and high Xmax coil options
Weight 40 lbs
Dimensions 20 × 20 × 13 in

Thiele-Small Parameters – Standard Copper coils

  SSD 10 SSD 12 SSD 15 SSD 18
Coils DUAL 1 | DUAL 2 DUAL 1 | DUAL 2 DUAL 1 | DUAL 2 DUAL 1 | DUAL 2
FS Fs: 39.5 Hz | 39.5 Hz Fs: 39.8 Hz | 39.8 Hz Fs: 38.3 Hz | 38.3 Hz Fs: 27.6 Hz | 27.6 Hz
RE 0.75| 1.5 0.75| 1.5 0.75| 1.5 0.75| 1.5
QMS 5.13 | 5.13 5.49 | 5.49 6.05 | 6.05 7.14 | 7.14
QES 0.36 | 0.36 0.4 | 0.4 0.42 | 0.42 0.48 | 0.48
QTS 0.34 | 0.34 0.37 | 0.37 0.4 | 0.4 0.45 | 0.45
MMS 279g | 285g 311g | 314g 344g | 351g 393g | 399g
CMS 0. | 0. 0. | 0. 0.| 0. 0. | 0.
SD 310cm^2 | 310cm^2 480cm^2 | 480cm^2 810cm^2 | 810cm^2 1210cm^2 | 1210cm^2
VAS 7.71 l | 7.71 l 16.5 l | 16.5 l 47.08 l | 43.08 l 91.4 l | 91.4 l
SPL 83.1dB | 83.1dB 86.1dB | 86.1dB 89.6dB | 89.6dB 91.4dB | 91.4dB
BL 17.11 N/A | 24.3 N/A 17.11 N/A | 24.3 N/A 17.11 N/A | 24.3 N/A 17.11 N/A | 24.3 N/A
XMAX 22mm (One Way) 22mm (One Way) 22mm (One Way) 22mm (One Way)
RMS 1500W 1500W 1500W 1500W

Technical Specifications

  SSD 10 SSD 12 SSD 15 SSD 18
Overall Diameter 11.000” 12.500” 15.625” 18.500”
Cutout Diameter 9.250” 11.125” 14.125” 16.750”
Mounting Depth 6.000” 6.500” 8.000” 9.500”
DriverDisplacement 0.12cuft 0.14cuft 0.17cuft 0.22cuft
Sealed Box 0.2-0.4 cuft 0.7-1.2 cuft 1.5-2.5 cuft 3.5-5 cuft
Ported Box 0.6-1.2 cuft @ 33Hz 1.8-2.5 cuft @ 33Hz 3-4 cuft @ 33Hz 6-10 cuft @ 33Hz

This is a complete list of options; not all options are available on all models.
See drop down selections for options available with each speaker model.

Cooling Stage: The new cooling stages are aluminum rings or plugs that aid in cooling and reducing the inductance of a coil (as well as linearizing it to further reduce distortion).  The first stage is a machined aluminum sleeve over the pole.  This has better thermal conductivity than steel alone does and reduces the effect of the coils inductance increase being an iron core inductor.  The second stage includes the first pole sleeve and adds an aluminum pole cap that increases compression and cooling.  The third is the first two stages along with the large visible heatsink that surrounds the outside of the coil and transfers heat to the ambient environment as well as greatly reducing the inward inductance of the coil.  The overall effect increases cooling/thermal capacity as well as linearizing in vs outward inductance shift reducing distortion ad increasing bandwidth

Cooling: Self explanatory, the cooling channels are machined into the inside of the sub to help cool the coil FAR better. This option is available for subs that do not have staged cooling.  While it is not a visible option, it makes a huge difference in long term thermal capacity.  

High QTS: This option is for users who intend on using the subwoofer in only a sealed enclosure.

Low QTS: This option is for users who intend on using the subwoofer in only ported enclosures.

Extra Spider: This option adds an additional spider to the spider pack to help with mechanical power handling and keeping the moving assembly under control.  It can have small detrimental effects on the sound quality of the sub if the sub is made too stiff (reducing excursion ability and low frequency bandwidth).  But in some applications the losses are offset by the ability to use extra power.  An extra spider is not a bandaid for improper subsonic filter settings on your amp/DS with respect to the box tuning (should be 2-3 Hz lower than box tuning to avoid mechanical issues when the port unloads).

Internal Lead: This option is for 8 lead per coil, increasing the current flow from coil to terminals.  It is sandwiched between the spiders to keep it linear and from flopping around under extreme excursion.

Plus Coil Pack: This option adds an extra spider and the larger/higher power handling Omega/TeamV3 coil.  This well bump thermal capacity from 3500W to 4500W or more depending on other options and application.  The extra spider helps keep the additional moving mass and power under control while the coil has much higher current carrying capacity over the standard 4″ coils.


Speaker Terminals

We have two terminal options on selected subwoofers.

Our Standard Push terminal using 144 strand count sewn tinsel leads Or our new Hybrid+ lead system with ring terminal attachment for high power systems.



We have 4 Dustcap options on selected subwoofers.

Our regular Dry Carbon composite dustcap and new Gloss Carbon. Both variants are available in 6″ and ‘Big’ 7″ diameters to further your customized experience with Fi.



We have a wide array of color options to choose from, with over 10 colors to choose from we’re sure you’ll find something to enhance the look of your Fi subwoofer.


Subwoofers & Recones are dispatched via FedEx Ground. Small goods such as sticker packs, various apparel items are shipped via USPS. Upon dispatch of your goods, order status will be updated from “test/pack” to “shipped” which is accompanied with tracking details.

General Information

All orders are custom made to your selected options.  Each order is machined from raw steel and hand made after it is ordered.  This normally takes 10-15 business days, but due to unforseen issues it can take longer. We will note much of this directly on the individual product pages and try to update this weekly.  There are a couple of times a year that we simply can not keep up with sales and these “normal” time lines will not be in effect.  These times normally include Black FiDay and tax season.  During these times we will run batch orders per series and not individual orders.  This increases our overall efficiency, but can put your order into a later build date.  Fi will maintain reasonable communication should an item take longer than our normal 15 business days to make during our normal build seasons.  Often we will post through Facebook and Instagram our batch sequences to give all customers a better time line.  We also note for each item the current lead times (which can be longer than our normal 10-15 business days. Should an item take longer than normal, all refund policies still are in effect.

Delivery Location

Items offered on our website are only available for delivery to the verified billing addresses in the US and Canada. We also accept orders from international customers who are shipping to addresses on an individual basis.  All items will ship direct from our Las Vegas, Nevada location.

Delivery Time

An estimated delivery time will be provided to you once your order is placed. Delivery times are estimates and commence from the date of shipping, rather than the date of order. Delivery times are to be used as a guide only and are subject to the acceptance and approval of your order.  Deliveries will be made through FedEx Ground unless otherwise noted.  Delivery times in the US generally take from 1 to 5 business days depending on how far you are from our facility in Las Vegas, Nevada

Unless there are exceptional circumstances, we make every effort to fulfill your order within [15] business days of the date of your order. Business day mean Monday to Friday, except holidays.

Date of delivery may vary due to carrier shipping practices, delivery location, method of delivery, and the items ordered. Products may also be delivered in separate shipments.

Delivery Instructions

We will only ship to the customers billing address.  No exceptions.  All orders are shipped with direct signature required.  We will not ship orders without direct signature, sorry if this causes any inconvenience.  Fedex will send an email to your customer supplied email address once the order has shipped.  This normally happens after 6PM PST on the day it is picked up.

Shipping Costs

Shipping costs are based on the weight of your order and the delivery method. To find out how much your order will cost, simple add the items you would like to purchase to your cart, and proceed to the checkout page. Once at the checkout screen, shipping charges will be displayed.

Additional shipping charges may apply to remote areas or for large or heavy items. You will be advised of any charges on the checkout page.  

All shipping rates are pulled directly from our FedEx rate chart.  We do not charge extra over our actual cost from FedEx.  Fi also pays from its own pocket for DSR (Direct Signature Required) and Insurance for any order over $500.

Damaged Items in Transport

If there is any damage to the packaging on delivery, contact us immediately.  A claim will need to be filed with Fedex.  In contacting us please have your order number (it has been emailed to you and is on the shipping label) and your tracking number (emailed to you and on the shipping label) ready to expedite the claims policy.


If you have any questions about the delivery and shipment or your order, please contact us.


    This subwoofer is a huge improvement over the Infinity Kappa 1200w that this 12″ SSD replaced. In this price range I don’t think you can find a better built speaker. It’s exactly what I expected it to be. Ordered mine with cooling, integrated leads, and stiff high Xmax options. Current setup is with 2 XS Power D3400 batteries with 1/0 OFC cable to an XTR 1500.1Dz, it’s a match made in heaven! Despite the prefab ATrend slammer enclosure it sounds amazing. I’m in the process of building a proper C.A.F. blueprint enclosure for it. Fi customer for life! I can definitely see myself upgrading to the ferrite Q in the future.


    I got the 18 with SQ suspension, xmax coil, extra spider, cooling, and integrated leads, and I believe its the best sub I could’ve bought for what I wanted for the price.

    I upgraded from 2 Alpine R-Series 12s in a custom ported box I built myself as I am a very experienced box builder. Those didn’t give me the punch I was hoping for nor did they have the output. Just disappointing subs honestly. I also used to have a Fi Alpha v2 15 when they made those and that was my favorite sounding sub until I went back to Fi to get this 18.

    The box I built for this is 6 cubic feet tuned to 36 Hz because I wanted it to peak around 40 Hz while maintaining a clean punchy sound. This was ran on a Crescendo S1 which is 1500w+ RMS. I listen to mostly metal and I don’t give a toot about anything under 35 Hz or so. I also run 8 awg speaker wire for this and it barely fits in the terminals which is fine because I don’t think anyone would need bigger than that. This sub sounds EXACTLY like I wanted it to. Great sound quality with all types of music, smashes lows if I wanted it too, and its louder than the Alpine 12s.

    I also built a box for a customer for a SSD 15 for a trunk build, and it was 3.8 cubes tuned to 33 Hz. That was very impressive with the lows and he ran it on a Taramps 3k @ 1 ohm.

    I would highly recommend this sub to anyone as you can customize it for what you would use it for. For the price, I believe this is the best sub I could’ve got. I will continue to come back to Fi for great, custom, hand built subs.

Add a review

Post your comment

Related products