Klipsch KA-1000-THX

Klipsch KA-1000-THX Amplifier to Pair with Klipsch KW-120-THX Subwoofer

The Klipsch KA-1000-THX amplifier has been specially developed to power up to two passive subwoofers under the most demanding conditions. With a power output of 500 W at 8 Ω and up to 3000 W peak, this ultra-powerful amplifier is designed to deliver large amounts of current in the very low frequencies. Its massive toroidal power supply and high-efficiency Class D amplification allow it to provide 1000 W under a 4-ohm load, while maintaining total harmonic distortion below 1.5% between 20 Hz and 1 kHz.

Recommended for the Klipsch KW-120-THX subwoofer, the KA-1000-THX can produce an impressive sound pressure level of 130 dB at 30 Hz when paired with it. This guarantees highly engaging home theater sessions, with deep and punchy bass that immerses you in the heart of the action. The extended frequency response from 20 Hz to 1 kHz (+0/-3 dB) ensures faithful and detailed reproduction of low frequencies, for an immersive and realistic sound experience.

Versatile Connectivity for Easy Integration

The Klipsch KA-1000-THX offers great connection flexibility to easily integrate into your home theater or hi-fi setup. It features two line inputs on gold-plated RCA jacks, allowing it to connect to the subwoofer output of a home theater amplifier or the preamp output of a stereo hi-fi system. Two unfiltered line outputs on RCA are also available to send the signal to other equipment if needed.

To connect your subwoofers, the amplifier is equipped with two professional Speakon NL2 speaker outputs. These lockable connectors ensure optimal power transfer to the transducers while facilitating connection. Whether you use one or two Klipsch KW-120-THX subwoofers, the KA-1000-THX will power them with authority for dynamic and controlled bass reproduction.

Total Control Over the Bass

For precise adjustment of the bass response, the Klipsch KA-1000-THX incorporates many practical features. A continuously variable low-pass filter from 40 to 120 Hz with a 24 dB/octave slope allows you to adjust the cutoff frequency according to the characteristics of your main speakers. The phase control, continuously adjustable from 0 to 180 degrees, optimizes the integration of the subwoofer in the listening room.

The amplifier also features a level control and a Boundary Gain Compensation switch to adapt the response to the acoustic constraints of the listening area. A THX mode, activated by a simple switch, bypasses these settings for plug-and-play use with THX-certified electronics. The automatic power-on function, with a 2-second delay at startup and a 15-minute delay at shutdown, makes everyday use easier.

Robust and Functional Design

With its compact (445 x 121 x 311 mm) yet robust chassis, the Klipsch KA-1000-THX will easily find its place in your setup. Its black brushed aluminum front panel gives it an elegant and discreet aesthetic. The build quality is evident, with a substantial weight of 12.3 kg that reflects oversized internal components.

The rear panel groups all the connections in a rational layout, with clearly identified terminals and switches. Four rubber feet ensure effective vibration isolation, while generous ventilation slots maintain optimal cooling for the amplification circuits. Every detail has been designed to offer optimal performance over the long term.

A Concentration of Technology for Sound

The KA-1000-THX benefits from all of Klipsch’s expertise in amplification. Its oversized power supply utilizes a massive toroidal transformer capable of delivering high current without constraint. The amplification stages employ an advanced Class D topology, combining power, speed, and energy efficiency.

Handpicked components, such as very low impedance filtering capacitors or matched power transistors, contribute to the amplifier’s very low harmonic distortion. Special attention has been paid to circuit design to maintain an optimal signal-to-noise ratio and great dynamics, even at high volume. With the KA-1000-THX, the bass is both ample, tight, and perfectly defined.

Technical Specifications

Amplification

• High-efficiency Class D amplifier
• FTC nominal power:
  • 500 W at 8 Ω
  • 1000 W at 4 Ω
  • 20 Hz - 1 kHz at < 1.5% THD
• Dynamic power:
  • 2050 W at 8 Ω
  • 3025 W at 4 Ω at 5% THD

Audio Performance

• Frequency response: bandwidth 20 Hz - 1 kHz ± 3 dB
• Low-pass filter:
  • Continuously adjustable from 40 Hz to 120 Hz
  • 24 dB/octave slope above 120 Hz (non-THX mode)

Features

• Powers two high-performance subwoofers
• Black machined aluminum front panel and knobs
• Filter bypass switch
• Automatic on/off circuit with signal detection (selectable)
• THX function can be enabled/disabled
• Positioning gain compensation can be enabled/disabled

Connectivity

• Inputs: 2 gold-plated RCA jacks
• Outputs:
  • 2 gold-plated RCA jacks (unfiltered)
  • 2 Speakon NL2 jacks

Physical Characteristics

• Power supply voltage: 110/120 V AC 60 Hz, 230 V AC 50/60 Hz (export version)
• Power-on delay: 2 seconds
• Standby delay: 15 minutes
• Dimensions (H × W × D): 12.1 × 44.5 × 31.1 cm
• Weight: 5.4 kg