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ENERGY ESW-M6 800W Powered Subwoofer | Black• delivers deep, accurate effects and music, with up to 800 watts of room-filling power, from an 8-inch cube that's the smallest we make.• Finish • System Type: Single active, dual passive• Frequency Response: 42Hz-200Hz +/- 3dB• Variable Low Pass Filter: 50Hz-200Hz, bypass• Variable Phase Control: 0 Degree - 360 Degree• Power Mode Switch: Off / Auto / On• Inputs: L + R Line in/Sub in• Max Driver Excursion: 104dB @ 42Hz, ground plane, 1M• Amplifier Power Output: 800 Watts• Dimensions 8 x 8 x 8"• Weight 10.1 lbs
Verdict: Fair asking price, possibly slightly high. The ESW-M6 is a compact, capable cube sub with genuine appeal—200W RMS (800W peak) amplifier, 42–200Hz response, and dual passive radiators make it genuinely useful for smaller rooms or as a mid-bass supplement. Used examples typically move in the USD$300–450 range depending on condition and included cables. At USD$475, you're at the upper end but not unreasonable if the unit is clean and fully functional. This model has held its value reasonably well since its introduction, though it's not a steal.
Before buying, verify the amplifier powers on reliably and listen for any cone rattle or distortion at moderate volumes—the passive radiators can develop issues if the sub's been moved roughly or stored poorly. Confirm all inputs (RCA and XLR) work, that the variable phase control and low-pass filter sweep smoothly, and that you're getting the original power cable. If the seller can't demonstrate clean operation across the frequency range, negotiate down or pass; repair costs aren't worth it on a sub this size.
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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