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Description
HK Audio LINEAR SUB 4000 2400-Watt Passive Subwoofer - 2x18"Description L SUB 4000 A LOW END BOOST FOR THE LINEAR SERIES L SUB 4000 is a powerful 18 double vented bandpass subwoofer. Compatible with all LINEAR 5 fullrange speakers and mid high units, its powerful low end ranging from 30 to 100 Hertz is totally and powerfully impressive. L SUB 4000 A can also serve as a sub low add on to LINEAR SUB 2000 to beef up the bottom end when required (optional frequency separation). Filter presets are available for
Description
L SUB 4000 – A LOW-END BOOST FOR THE LINEAR SERIES
L SUB 4000 is a powerful 18” double vented bandpass subwoofer. Compatible with all LINEAR 5 fullrange speakers and mid/high units, its powerful low end – ranging from 30 to 100 Hertz – is totally and powerfully impressive. L SUB 4000 A can also serve as a sub-low add-on to LINEAR SUB 2000 to beef up the bottom end when required (optional frequency separation). Filter presets are available for Lab.gruppen IPD and PLM 12K44 controllers.
- Powerful and versatile 18” subwoofer
- Rugged wooden enclosure of birch multiplex: 15/18 mm, 9/13 ply
- Power handling program: 2400 W
- 31Hz – X-Over
- 137 dB half space
- 1 x 18” speaker with 4” voice coil
- Compatible with all LINEAR 5 fullrange speakers and mid/high units
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
4.6 ★★★★★
Based on 13 reviews
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Product Reviews
★★★★★ 5
It definitely is fiber
Flavor Name: Original Coarse Sugar, Size: 1.86 Pound (Pack of 1)
It is nice to take a break from the orange flavoring they have with the original one, and the sugar does help it go down easier, but please for your sanity DO NOT DRINK THIS WITH JUST PLAIN WATER. I like to mix it up in flavored water with those sugar free drops that let me control what flavor the water is without suffering from raw dogging the unflavored powder because that will taste like drinking a glass of sand. Next time I'll try out the clear blend without any sugar to see if there's a difference, but this bottle will last a while. Also be gradual with introducing it into your diet and work up to a few teaspoons throughout your day to not overload your body.
All that aside, it works well and my body feels more comfortable with the extra fiber in my life. I highly recommend some form of this because it's really tough to get enough fiber in many diets.
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Reviewed in the United States on March 30, 2026
★★★★★ 5
Unflavored but sweetened Metamucil
Flavor Name: Original Coarse Sugar, Size: 1.86 Pound (Pack of 1)
If the orange flavored Metamucil is too acidic for you but you want a sweetened unflavored variation, this is just right. It is sometimes hard to find and is often sold out at the drug store or grocery store. I was glad to find it on Amazon.
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Reviewed in the United States on April 15, 2026
★★★★★ 5
Metamucil, Psyllium Husk
Flavor Name: Original Coarse Sugar, Size: 1.86 Pound (Pack of 1)
Healthy, works well for the stomach issues plus it's loaded with nutrients.
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Reviewed in the United States on May 28, 2026
★★★★★ 5
Unflavored original texture with sugar is the best!
Flavor Name: Original Coarse Sugar, Size: 1.86 Pound (Pack of 1)
I don't why the fake orange flavor is so popular. Unflavored is neutral and agreeable. Even with the sugar this product is very low glycemic index because the tiny amount of sugar is offset by the fiber.
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Reviewed in the United States on December 12, 2025
★★★★★ 4
Works but VERY thick
Flavor Name: Original Coarse Sugar, Size: 1.86 Pound (Pack of 1)
Thought I was ordering the orange flavor, which I can drink, successfully. The unflavored, sugar free is what I actually ordered. My fault, not the seller, but the difference, for me is huge! I can't choke it down. Flavor is completely neutral, it isn't that. But, seems so much thicker than the orange. ? Maybe it isn't, could be that the thickness of the orange is same but I can trick myself into thinking its orange pulp. Who knows. But, in any event, the unflavored definitely seems like I'm drinking mud. I can't do it. Too bad, too, because the product is VERY effective. I have colitis/IBS and the Metamucil brand works so much better than anything I've tried, in helping with GI issues, in general. Increased regularity, more comfortable passing, and over time, a GI cleansing that you can actually feel. I highly recommend the product, but you might want to pay extra for the orange flavor. Might make the difference in you being able to drink it with the consistency required for best results.
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Reviewed in the United States on July 29, 2020
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