Fi Car Audio HT-1 18

Code: FI-HT1-18

Home Theater series of drivers, the HT1.


In Stock

Ohm *

Dustcaps *

Dust Cap Logo Colour *

Disclaimer *

There are special terms & conditions related to this product.


Introducing the first sub in our new Home Theater series of drivers, the HT1.

Utilizing our 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 along with a solid pole and helical cooling channels for 1000W of power handling. A high excursion 8″ spider, stitched leads, a multilayer foam surround attached to a fiber impregnated kraft pulp cone helps keep things under control in both ported or sealed applications. The 3″ coil is available in single 2 Ohm or single 4 Ohm with 27mm of Xmax.

HT-1 18
FS 20.7 Hz | 20.9 Hz
RE 1.35 | 2.85
QMS 6.89 | 5.75
QES 0.59 | 0.57
QTS 0.53 | 0.51
MMS 525 g | 518 g
CMS 1.083 mm/N | 1.083 mm/N
SD 1210cm^2 | 1210cm^2
VAS 222.1 L| 222.1 L
SPL 87.5 1W/1m | 87.6 1W/1m
BL 12.89 | 18.77
XMAX 27mm (One Way)
RMS 1000W

Overall Diameter 18.500”
Cutout Diameter 16.750”
Mounting Depth 6.500”
DriverDisplacement 0.18cuft
Sealed Box 2-4 cuft
Ported Box 5-10 cuft @ 23Hz

Single 2 and 4 Ohm Coils
Cast basket
Wrap around gasket
Kraft pulp fiber reinforced cone
Multi layer wide foam surround
Push terminals
FEA optimized motor
3” diameter 4 layer coil
Single High grade magnet
Carbon Dustcap
Machined in house at Fi

Custom Options Explained


“Fi Terms & Conditions”



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Additional information

Weight 19.00 kg


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.