Description
KLM POWER™ LPS-42B2 Audiophile Amplifier
Amplification Redefined. Audio Re-imagined™ — Ultra-linear, high-precision power for professional loudspeaker systems.
- Ultra-linear topology: Audiophile-grade precision with industry-defining low distortion.
- High power density: Up to 330 W per cubic inch in a compact vertical chassis.
- Professional utility: Designed for premium installed audio and live sound reinforcement.
Product Overview
The KLM LPS / Linear Power Switch is a family of ultra-linear, high-precision audio power amplifiers engineered to deliver audiophile performance in demanding professional environments. It impresses precise control upon any connected loudspeaker system, ensuring intelligibility, dynamics, and reliability in installed and live sound applications.
The LPS-42B2DS model combines compact form factor with exceptional power density, allowing multiple units to be stacked vertically for distributed amplification solutions without sacrificing performance or control.
Core Technology
At the heart of the LPS-42B2DS is KLM’s proprietary Linear Power Switch topology, redefining professional amplification with ultra-low distortion, high damping, and wideband frequency response.
- Linear Power Switch topology: “The LPS redefines professional amplification with our proprietary Linear Power Switch topology, exhibiting industry defining parameters ranging from T.H.D. [<0.0006%] / Damping / Frequency response (6Hz–42KHz)…”
- LLC power converter: A groundbreaking LLC power converter powers the LPS over a wide input voltage, load, and temperature range, delivering uncompromised lows and crisp highs across all audio content.
- High-speed limiters: On-board high-speed limiters ensure clip defeat at all times for an indelible audio experience.
- Integrated filters: Two independent channels with graduated gain controls and selectable 24 dB/octave low-pass / high-pass filters simplify system design by eliminating external crossovers and complex limiters.
Application Areas
The LPS-42B2DS is optimized for a wide range of professional audio scenarios where clarity, control, and reliability are critical.
- Premium installed audio: Corporate AV, hospitality, houses of worship, auditoriums, and themed venues.
- Live sound reinforcement: Light to medium live stage sound, small to mid-size events, and touring rigs.
- Distributed amplification: Column-stacked deployments for multi-zone systems and scalable installations.
- High-performance playback: Reference listening rooms and critical monitoring environments.
Key Advantages
- Ultra-low distortion: Total harmonic distortion of 0.0006% at full power, all channels driven at 4 Ω.
- Exceptional damping: Damping factor of 1860 at 4 Ω for precise voice coil motor control.
- Wide frequency response: 6 Hz–42 kHz (−3 dB roll-off) for full-range, high-fidelity reproduction.
- High channel separation: >120 dB crosstalk performance for clean stereo imaging.
- Compact vertical chassis: 215 mm (H) × 60 mm (W) × 186 mm (D), stackable for space-efficient racks.
- Robust power management: Operates from 150–290 V AC @ 50 Hz with maximum input current of 5.1 A.
- Intuitive controls: Geared gain potentiometers per channel, selectable HPF/LPF, and clear status indicators.
Technical Specifications
Audio Power Output (All Channels Driven)
| 660 W @ 2 Ω × 2 CH | 24% duty cycle |
|---|---|
| 440 W @ 4 Ω × 2 CH | 24% duty cycle |
| 222 W @ 8 Ω × 2 CH | 24% duty cycle |
Performance
| Frequency response | 6 Hz – 42 kHz (−3 dB roll-off) |
|---|---|
| Total harmonic distortion | 0.0006% at full power, all channels driven @ 4 Ω |
| Channel separation / crosstalk | >120 dB |
| Damping factor | 1860 @ 4 Ω for 60 Hz sinusoidal waveform |
Input & Control
| Input sensitivity | +1.5 dBu for maximum power output |
|---|---|
| Input impedance | 33 kΩ balanced |
| Gain controls | 2 geared potentiometers (1 per channel) |
| Active filters | 4 selectable HPF/LPF (24 dB/octave, per channel) |
Indicators & Status
| Signal / limiter | 2 indicators (1 per channel) |
|---|---|
| Power indicator | 1 red (constant) |
| System status | 1 green (pulsed) |
Power Management
| Input voltage | 150–290 V AC @ 50 Hz |
|---|---|
| Maximum input current | 5.1 A |
Mechanical
| Chassis format | Rack-mountable, vertical orientation |
|---|---|
| Dimensions (H × W × D) | 215 mm × 60 mm × 186 mm |
| Stacking | Designed to be stacked in columns for distributed amplification |
Q&A
Q: What makes the LPS-42B2DS “audiophile-grade” in a professional environment?
A: Its proprietary Linear Power Switch topology delivers ultra-low distortion (0.0006% THD), high damping, and wideband response, ensuring precise control and clarity even under demanding loads.
Q: Can I use the LPS-42B2DS for both installed and live sound?
A: Yes. It is specifically intended for premium installed audio and light to medium live stage sound reinforcement where intelligibility and performance are prime.
Q: Do I still need external crossovers and limiters?
A: In many cases, no. The onboard selectable HPF/LPF filters and high-speed limiters simplify system design by reducing the need for external processing.
Q: How does the amplifier handle power fluctuations?
A: The LLC power converter is designed to operate reliably across a wide input voltage range (150–290 V AC), maintaining consistent performance and protecting the system.
Bring Hyper Amplification to Your Next Project
Integrate the KLM POWER™ LPS-42B2DS into your installed or live sound system for uncompromised clarity, control, and reliability.
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