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HK Audio LINEAR 9 118 Sub BA 1100W 2 x 18" Active Subwoofer
Looking to shake the ground with your sound system? The HK Audio LINEAR 9 118 Sub BA 1100W 2 x 18" Active Subwoofer brings powerful, deep bass that fills large spaces with energy. Whether you’re running a concert, event, or just want your live setup to hit harder, this subwoofer packs the punch. It’s easy to set up, fits right into pro audio systems, and is built to last through show after show.
HK Audio LINEAR 9 118 Sub BA 1100W 2 x 18" Active Subwoofer Review
The HK Audio LINEAR 9 118 Sub BA isn’t just loud—it’s smart. With a built-in 1100W Class D amplifier and a heavy-duty 18-inch driver, it delivers clear, booming bass all the way down to 31 Hz. The onboard DSP gives you full control over EQ, delay, and limiting, so you can shape your sound exactly how you want it. Need to control bass direction on stage? The cardioid presets handle that with the push of a button. Plus, the rugged birch housing means this sub is ready for the road.
HK Audio LINEAR 9 118 Sub BA 1100W 2 x 18" Active Subwoofer Features
Brings deep, punchy bass to live shows, clubs, and events
Easy-to-use sound presets for quick setup and tuning
Built to last with a strong wood cabinet and protective finish
Multiple handles make it simple to carry and move
Works great with other speakers in the LINEAR 9 series
Can be fine-tuned using special control software
HK Audio LINEAR 9 118 Sub BA 1100W 2 x 18" Active Subwoofer Specs
1100W RMS Class D amplifier with one 18-inch driver and 4-inch voice coil
Frequency range from 31 Hz to the crossover point
Maximum SPL Peak at 136 dB in half-space
Two XLR combo inputs, two XLR thru outputs, and one DSP-Out
96 kHz sample rate with less than 2.6 ms system latency
PowerCON In/Thru connectors, 100–240V range, 1.9 A power draw
Sturdy birch multiplex cabinet with PU coating
Weighs 139.9 lbs and measures 43.28 x 22.05 x 27.17 inches
At USD3,999, this HK Audio LINEAR 9 118 Sub BA asking price feels ambitious for the used market. These pro-grade bandpass beasts with dual 18-inch drivers and 1100W Class D punch typically list new around USD4,500-USD5,000, but clean used examples in the US go for USD2,800-USD3,500 depending on hours and condition—bargain territory would dip under USD3,000.
Before biting, verify the amp's health with a power-on test and low-end sweep for distortion-free output down to 38Hz, as Class D modules can overheat and fail under heavy touring. Confirm network EtherCon ports function for DSP Control software, and check for the original PowerCon cables plus any grille—missing accessories often hide hard use.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Energy Speakers emerged from Canada in 1973, rooted in a commitment to scientific loudspeaker engineering. Born from participation in the National Research Council of Canada's extensive study from 1977 to 1986, the brand quickly established its heritage with the iconic Energy Pro 22, a design that set benchmarks for accuracy and became a staple, evolving into the Connoisseur and Reference Connoisseur 22 lines. This foundation of research-driven innovation has defined Energy's unwavering pursuit of audiophile-quality sound reproduction.
The brand focuses squarely on loudspeakers, delivering categories from high-end Reference Connoisseur series to value-packed C-Series and RC-Mini wood-cabinet models. It has expanded into powered solutions with the Energy Power Series, including the pioneering Power Bar soundbar, which integrates seamlessly into modern systems without a receiver. While not delving into amplifiers, turntables, DACs, headphones, or cables, Energy prioritizes speakers renowned for sonic precision and spatial drama.
Positioned as a mid-tier contender with premium aspirations, Energy holds strong appeal among discerning buyers seeking powerful, accurate performance at accessible prices. Acquired by Klipsch Group in 2005 alongside Mirage, it maintains a reputation for reliability and value, backed by decades of critical acclaim in the competitive hi-fi market.
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