Klipsch KA-1000-THX
The KA-1000-THX is the subwoofer amplifier Klipsch built to drive its THX Ultra2 home theater system. It was designed exclusively for the company's KW-120-THX subwoofers. It's a THX Ultra2-certified monoblock, and retailers consistently called it "the powerful driving force" behind the Ultra2 setup.
It's a full-featured Class D design with a massive toroidal power supply. The front panel carries controls you'd expect on a serious sub amp: a defeatable low-pass crossover, level control, a boundary-gain compensation switch, and a completely variable phase control, plus THX on/off switching. It was rated to deliver 500 watts continuous into 8 ohms, or 1,000 watts continuous into a 4-ohm load, with frequency response specified at 20Hz–1kHz +0/−3dB. Retailer copy promised it could drive one or two subwoofers and deliver "deep, impactful bass" for both music and film.
Beyond that, the record is thin. No production years, original price or dimensions are documented in any source we could find. The manual exists as a 28-page document and a shorter 6-page variant, but the text isn't publicly accessible, so no further design or setup details can be confirmed here. There are no substantive owner reviews in the archive, and no information on common failures or parts availability.
Known specifications
- Type: THX Ultra2-certified monoblock subwoofer amplifier (Class D)
- Power output: 500W continuous into 8 ohms; 1,000W continuous into 4 ohms
- Frequency response: 20Hz–1kHz +0/−3dB
- Controls: defeatable low-pass crossover, level control, boundary-gain compensation, variable phase, THX on/off
- Designed for use with Klipsch KW-120-THX subwoofers
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