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Description
HELIX IK W8 - 8" Subwoofer - 1 x 2 OhmHELIX IK W8 Stunning bass performance out of compact dimensions With the new KW chassis, were expanding our IMPACT subwoofer lineup, offering powerful drivers for use in very compact enclosures. Especially when it comes to the most efficient usage of available space in the vehicle regarding an individual enclosure design, these woofers create completely new installation possibilities without ever compromising the acoustic performance. Clever down to
HELIX IK W8
Stunning bass performance out of compact dimensions
With the new KW chassis, we’re expanding our IMPACT subwoofer lineup, offering powerful drivers for use in very compact enclosures. Especially when it comes to the most efficient usage of available space in the vehicle regarding an individual enclosure design, these woofers create completely new installation possibilities without ever compromising the acoustic performance.
Clever down to the last detail
The extremely stiff cone made of hand-scooped paper fibers in connection with the heavy-duty driver system not only converts amplifier power easily and without compression effects into loads of sound pressure, but also scores sonically with subtle beats.
Flexible connection – 2 x 2 or 1 x 2 Ohms
The chassis are available as 1 x 2 Ohms (SVC2) or 2 x 2 Ohms (DVC2) version. Thus, these subwoofers always offers the right solution for every amplifier configuration to get the maximum performance out of it – whether mono, 2-channel or even multi-channel amplifier.
"All inclusive" for self-made enthusiasts
In addition, the solid protective grille and gasket are also included. For optimal bass performance in DIY installations you can find recommendations for sealed and vented enclosures with all parameters such as net volume, port tuning frequency as well as DSP settings in our technical data sheet.
Features
- 1 x 2 Ohms single voice coil
- Extremely stiff, hand-scooped paper cone for outstanding impulse response
- Double ventilated voice coil for minimum compression effects and high power handling
- Long-excursion rubber surround for highest mechanical rating
- Solid push terminals
- Powerful magnet system for compact enclosures
- Rugged magnet cover with HELIX lettering for perfect magnet protection
- Grille and gasket included in delivery
Technical data
| IK W8-SVC2 – 1 x 2 Ohms | ||
| Power handling RMS / max. | P | 300 / 600 Watts |
| Impedance | Z | 1 x 2 Ω |
| DC resistance | Re | 1 x 2.0 Ω |
| Resonance frequency | Fs | 37 Hz |
| Mechanical Q factor | Qms | 4.01 |
| Electrical Q factor | Qes | 0.49 |
| Total Q factor | Qts | 0.44 |
| Compliance | Cms | 190 μm/N |
| Equivalent air volume | Vas | 13.4 L |
| Force factor | B*I | 10.2 Tm |
| Sensitivity | SPL |
91.0 dB @ 2.83V / 1m |
| Cone area | Sd | 219 cm² |
| Moving mass | Mms | 86 g |
| Cone material | Hand-scooped paper cone | |
| Mechanical resistance | Rms | 6.1 kg/s |
| Voice coil diameter | ø | 50.8 mm |
| Voice coil winding height | 24 mm | |
| Max. linear excursion | Xmax | +/- 8.0 mm |
| Outer diameter | ø | 213.5 mm / 8.40" |
| Installation diameter | ø | 182 mm / 7.17" |
| Installation depth | 101 mm / 3.98" | |
| Recommended enclosure volumes | ||
| Sealed box | ||
| Net volume | 10 L | |
| Lower limiting frequency (-3dB) | 45 Hz | |
| Recommended DSP settings | Recommended "self-define" highpass filter with 46 Hz cut-off frequency and Q = 1.5, additional EQ filter 90 Hz / Q = 1.0 / -2.5 dB |
|
| Vented box | ||
| Net volume | 9 L | |
| Port diameter | ø | 60 mm / 2.36" |
| Port area | 28 cm² | |
| Port length | 46 cm / 18.1" (angled port) | |
| Port tuning frequency | Fb | 38 Hz |
| Lower limiting frequency (-3dB) | 41 Hz | |
| Recommended DSP settings | Recommended "self-define" highpass filter with 40 Hz cut-off frequency and Q = 1.2, additional EQ filter 90 Hz / Q = 0.9 / -2 dB |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 27 reviews
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Product Reviews
★★★★★ 5
Great Sheets!
Size: Twin, Color: Oatmeal
Super soft, wash up beautifully, seem well made — very happy! It’s very hard to find 100% cotton t-shirt type sheets and these are really lovely.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 1, 2026
★★★★★ 3
Weirdly textured
Size: King, Color: Dark Gray
I have bought and loved jersey sheets in the past, that have all been as soft as a well worn cotton t-shirt. These arent soft. They have the stretch of jersey, but not the soft smooth texture that they should have. Even after washing a few times these are one of my least favorite sheets I've ever bought on Amazon.
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Reviewed in the United States on May 30, 2026
★★★★★ 5
Soft, Breathable Sheets That Feel Great to Sleep On
Size: Twin, Color: White
This Amazon Basics jersey sheet set was a really good purchase. The cotton material is soft, stretchy, and breathable — it feels like sleeping in a comfortable T‑shirt. The fitted sheet has a nice snug fit that stays in place, and the flat sheet is lightweight without feeling flimsy.
The fabric washes well, doesn’t pill, and stays soft after multiple loads. It’s a great everyday sheet set for anyone who likes that cozy, relaxed jersey feel. Overall, comfortable, easy to care for, and great value for the price.
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Reviewed in the United States on May 18, 2026
★★★★★ 5
The Perfect Sheets To Lie On While Writing Amazon Reviews
Size: Full, Color: Light Gray
As I write this, I am laying on an adjustable full sized bed by Hofish and a 10.5" comfort foam mattress by Classic Brands. I know I sound like I am an Amazon plant, but I swear I am not. I'm not even a stockholder anymore.
This is the most awesome bed stylings combination I have had in many, many years. In fact, it is the best I have ever owned and it is beat only by some ritzy resort I stayed at on vacation like 20 years ago, though I admit I was pretty drunk the entire time so my memory might not be the most accurate.
But getting back to today... these sheets are great. I washed them twice - I'm not a neat freak, I am just amazingly disorganized and easily distracted while doing laundry, so tonight they went though two wash cycles and one dry. And then I put them on the bed. While these sheets are not deep pocket sheets, they don't need to be with this mattress. There is enough room and border for them to tuck and wrap with the elastic to give a strong grip under the mattress, which is important as the adjustable frame continually put the sheets and mattress though its repeated adjustable calesthenics-type positioning. The other two sheet sets I have used since I got this bed have struggled poorly with this. In the day or so and at least a dozen position changes, these sheets stay in place with no popped corners to exposing the bowl as the head and feet rise. Of course, till will tell if it lasts, but so far they are the best of the batch of sheets in my closet.
As for texture, they are awesome. I'm a dude. I don't really know what thread count or knit or whatever really means. But these sheets feel like a well-washed favorite, quality rock & roll concert t-shirt. And not one of these glitter puff stupid new groups, like a real rock band from the 80s that now charges $250 for a concert ticket and $60 for a t-shirt...but that group you saw back then, paid $10 for the shirt and you STILL have it and love to wear it because it is perfectly molded to your body, soft and reliable. The kind of shirt you will wear under your suit at work and just grin not just for mental middle finger to corporate dress codes, but because the t-shirt is just that great of a feeling.
Well, that is what these sheets feel like. And now you get to sleep in it. It is that awesome.
In LA right now we are having a nasty heat wave, but these sheets don't seem to bake me even with my stuttering AC. The flannel sheets I love seem to trigger the butt sweats as soon as I lay down in this heat, but no such problem with these.
So really, I'm absolutely happy with these things. I am going to order more in other colors as soon as Amazon gets them back in stock. Great price, great quality, great comfort, great fit, great deal. It is that simple.
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Reviewed in the United States on September 3, 2017
★★★★★ 5
Soft smooth and wrinkle free!
Size: King, Color: White
The most comfortable sheets I’ve had in years! Soft and don’t wrinkle up in the bed. Some reviews said they are thin but I think they’re perfect! I don’t want super thick sheets as we are hot sleepers. These are the perfect feel. They also stretch very well to fit on my mattress all the way around and I have a thick mattress! My precious sheets were a struggle to get over the corners but these fit perfectly. Would buy 10 times over! Such a good value as well!
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Reviewed in the United States on April 14, 2026
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