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The KA-1000-THX Subwoofer Amplifier from Klipsch is a full-featured Class D amplifier. It has a massive toroidal power supply that is capable of delivering 500W continuous into 8 ohms or 1000W continuous into 4 ohms. It can support two high-performance subwoofers and has a left and right RCA pass-through.Some valuable features include a front panel main power switch, a selectable signal-sensing auto-on/off circuit, and LED status indicators for crossover and level-control operation. Matching the look of Aragon home-theater components, finished in black with a machined aluminum front panel and knobs, the KA1000THX uses professional style NL2 Speakon outputs for the high current transfer of power to the subwoofer.Includes a selectable signal-sensing auto-on/off circuitMatching the look of Aragon home-theater components, the KA-1000-THX has a black anodized, grained-aluminum front panel with aluminum control knobsIncludes a front-panel main power switch and LED status indicators for crossover and level control operationPremium electronic components are used throughout for sonic purity and reliability500W continuous into 8 ohms or 1000W continuous into 4 ohmsCrossover bypass switchSelectable signal-sensing auto-on/off circuitCrossover bypass switchNL2 SpeakOn amplifier output jacks
Klipsch’s KA-1000 is a well-known companion amp for serious powered-sub setups, and at US$1,599 this asking price looks ambitious versus the recent used market. With a median of US$800 and a 75th percentile of US$1,199, this is sitting well above the usual range, so it needs a very strong justification to make sense.
That said, it’s the kind of piece buyers chase when they want the right match for a Klipsch sub and don’t want to compromise on drive or integration. If it’s truly clean, fully tested, and comes with the right accessories or provenance, the value is in convenience and certainty more than bargain pricing; otherwise, I’d wait for a more sensibly priced example.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Founded in 1946 in Hope, Arkansas, Klipsch traces its roots to Paul W. Klipsch, a visionary audio engineer and maverick who handcrafted his first speakers in a tin shed behind a dry cleaner. Patented in 1945, the revolutionary Klipschorn corner horn loudspeaker embodied his quest for live-like sound reproduction, drawing from Bell Labs principles to deliver wide frequency range and expansive soundstaging. This American pioneer shook hi-fi foundations, blending acoustic innovation with unyielding craftsmanship, and registered Klipsch & Associates to bring that tin-shed magic to the world.
Klipsch excels in loudspeakers, from flagship horn-loaded models like the enduring Klipschorn to high-fidelity enclosures, drivers, and complete systems for home audio, public address, and even personal computers. While deeply rooted in speakers, the brand has expanded into headphones and music systems, maintaining a focus on efficient, dynamic designs that prioritize clarity and power without excess amplification needs.
Renowned for its heritage-driven efficiency and bold, live-performance sonics, Klipsch holds a commanding mid-to-high-end position in the market, appealing to discerning buyers who value American-made authenticity over mass-market compromise. Neither purely vintage collector bait nor niche boutique, it bridges classic horn technology with modern reliability, earning cult status among audiophiles chasing that bigger, clearer sound Paul Klipsch first chased in 1946.
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