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- USA
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Ships within 48 hours · Estimated delivery Jul 5 - Jul 10
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Description
HK Audio LINEAR SUB 1800 A Active Bass Reflex Subwoofer, 1200W Power - 18"L SUB 1800 A A LOW END BOOST FOR THE LINEAR SERIESLINEAR SUB 1800 A an 18" bass reflex subwoofer is packed full of low end. Unrivaled power, SPL of up to 132 dB and thumping bass (all the way to 38 Hz) make this powered sub the ideal add on to mid high units from the LINEAR 3 family when you need just a little more loudness and low end. LINEAR SUB 1800 A can also be used in combination with mid high units from the LINEAR 5 family, or as a bass
L SUB 1800 A - A LOW-END BOOST FOR THE LINEAR SERIESLINEAR SUB 1800 A - an 18" bass reflex subwoofer - is packed full of low end. Unrivaled power, SPL of up to 132 dB and thumping bass (all the way to 38 Hz) make this powered sub the ideal add-on to mid/high units from the LINEAR 3 family when you need just a little more loudness and low end. LINEAR SUB 1800 A can also be used in combination with mid/high units from the LINEAR 5 family, or as a bass extension to the ELEMENTS BIG BASE system.
Features
• Compact powerful subwoofer
• 1200 watts
• 1x 18″ Speaker
• 132 dB Max SPL Peak @ 10% THD (halfspace)
• Ideal add-on to mid/high units from the LINEAR 3 family
• Can also be used in combination with LINEAR 5 mid/high units, or as a bass extension to the ELEMENTS BIG BASE system
• Rugged wood enclosure
• Adjustable X-over frequency
• Integrated HK Audio MultiGrips
Details
• Max SPL: 130dB half space (@ 10% THD)
• Max SPL peak: 132 dB half space (@ 10% THD)
• Max SPL calculated: 133 dB half space
• Frequency response: +/- 3 dB: 42 Hz X-Over
• Frequency response -10dB: 38 Hz X-Over
• Power Rating: 1200 W
• Amplifier: Class D
• Active protection circuits: Under-voltage, thermal, short circuit, and over-current protection, Subsonic 24 dB/oct. peak limiter
• LF Speaker: 1x 18"
• Cut-off Frequency active: 100/120 Hz variable with 24 dB/oct.
• Connections: 2x XLR Combo In bal., 2 x XLR Thru bal., 2x XLR-Mid/High Out
• Input Sensitivity: +4 dBu @ Gain center-notched
• Pole mount: 1x M20 (K&M)
• Handles: 4x HK Audio MultiGrip
• Enclosure: MDF 16 mm
• Grille: 2 mm metal grille backed with black acoustic foam
• Finish: Acrylic enamel, black
• Optional accessories: Protective cover, Stereo Pole Add-On M20, tilt unit, 100 mm casters
• Dimensions (WxHxD): 51.0 x 67.0 x 72 cm
• Weight: 42 kg / 92.6 lbs.
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
4.1 ★★★★★
Based on 1146 reviews
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Product Reviews
★★★★★ 5
Great product for rv
This is an excellent product. The front of our camper was very faded from the sun even though we keep it under a cover. After four coats, it looks like a different RV. We are going to do the entire camper. The difference is amazing. You will be so happy with the results. We would give it a 10 if possible.
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Reviewed in the United States on October 19, 2025
★★★★★ 5
Amazing fiberglass restoration.
So easy to use and fabulous results. A few years back I had tried Maguires products to restore the shine on a 5th wheel. That was so labor intensive and the results were struggled to achieve faded quickly. I hesitated to Poli Glow due to the cost and our prior attempts lackluster results. I was able to get the restoration kit at a discount on Black Friday through the stores website and tackled the camper with the temps between 60-90 as instructed. I bought 2 of those kits just to find out that due to the climate and UV exposure the number of coats I would need for the Poli Glow was going to exceed the amount I had on hand through the 2 restoration kits. So I had to scramble to buy another bottle of Poli Glow. Applying this product is just time consuming and not difficult. Make sure to properly prepare the surface before using poliglow. The whole system turn a badly oxidized camper into a shiny finish. I am truly shocked. Hopeful the results will last a while.
5th wheel camper 40 foot long.
I have used 3 poliglow bottles (12 coats), 1 bottle poli ox, 1.5 bottles of Poli wash (of course, not in that order). I potentially need 1 more bottle of Poli Glow to finish nose cone/basement area (basement area is still in good condition so may not do this area if I can get the nose cone with the remainder of the Poli glow I have.)
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Reviewed in the United States on January 19, 2026
★★★★★ 4
Worth the time and effort.
After proper surface prep and 6 applications, my badly sun damaged RV shined like new, with many compliments. However, after a few months under the cover, the fiberglass surfaces that were in contact with the occasionally wet cover in the Florida sun discolored badly, and will have to be wet sanded and the coating re-applied. Also, the polish does not hold up well where boat fenders rub against the coating, and it wears away in cockpit areas that are heavy hand traffic, like hatchways and around handrails.
Overall a decent product, I will probably re-apply in a couple seasons.
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Reviewed in the United States on September 23, 2025
★★★★★ 5
Brings old paint back to life.
Best product for fiberglass oxidation. Tried many different wax’s and compounds. Poly Glow did what the wax could not do.
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Reviewed in the United States on April 29, 2026
★★★★★ 5
The beautiful shine!!!!
Wow so amazing!!!!! I have a 35 ft trailer you will need 2 bottles for two coats. Well worth the price.
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Reviewed in the United States on May 25, 2026