The D-Drive 1.2k4h-AE is LEM Commercial's new compact, half-rack amplifier, designed to deliver high performance, advanced management, and maximum reliability in modern fixed installations. It is part of the new generation of power amplifiers with integrated DSP, sharing a web-based control platform that allows configuration and monitoring from any browser, without dedicated software.
The heart of the D-Drive 1.2k4h-AE is a high-performance DSP based on the ADI Sharc platform, capable of managing a complete 4 × 4 matrix and a set of extremely advanced processing functions. The processing includes high-resolution FIR filters, parametric and dynamic equalization, compressors, expanders, and delays per channel, with the option of using presets dedicated to both the device and the speakers.
The power section uses proprietary Class-D technology with independent converters, designed to offer low noise, a linear frequency response, and a rated power of 4 × 150 W into low-impedance loads. The compact half-rack format allows for easy integration into installations where space is limited, maintaining the same philosophy of efficiency and reliability as the higher-end model.
Control is via Webcon, an integrated web interface that offers simultaneous multi-user access, compatibility with any browser on PC, tablet, and smartphone, and a unified workflow for managing multiple devices. The platform allows for real-time monitoring, level management, mute, device identification, GPIO configuration, IP wall panels, and the use of open APIs for integration with third-party systems.
In terms of connectivity, the D-Drive 1.2k4h-AE features analog and AES/EBU and AES67 digital inputs, ensuring high flexibility for integration into network audio systems. Outputs are available on Euroblock and/or speakON connectors, while the front panel features a modern interface optimised for 1/2 rack format, designed for compact installations and multi-zone systems. A special blank panel allows the amplifier to be mounted in a standard 19" rack space, or two D-Drive 1.2k4h-AE units can be mounted within the same width using two side fins and a metal top mounting plate.
The cooling system uses a configurable thermally controlled fan, ensuring consistent performance even under harsh conditions. The universal voltage power supply ensures full compatibility with international power grids, while system protection is provided by a comprehensive set of intelligent functions: automatic inhibition of HF signals, protection against overvoltage, short circuit, overtemperature, and other critical conditions.
From a construction standpoint, the D-Drive 1.2k4h-AE uses audiophile-grade components, including operational amplifiers, high-quality resistors and capacitors, and selected driver chips, to ensure clean and natural audio reproduction.
The D-Drive 1.2k4h-AE is therefore a next-generation compact amplifier, powerful, efficient, and designed to integrate seamlessly into modern systems. Professional audio ecosystems. The combination of advanced DSP, high-efficiency amplification, native web control, and networking options makes it an ideal choice for installations requiring quality, reliability, and centralized management in limited spaces.
User benefits
Powerful DSP for sound processing
Comprehensive 4 × 4 matrix
AES67 inputs, allowing integration into audio-over-IP networks
Webcon control platform (no dedicated control software required)
Simultaneous multi-user access: allows simultaneous, real-time control from multiple devices
Supports 70/100 V voltage output when used in bridge mode
Constructed with audiophile-grade electronics
Intelligent protection systems
Compact half-rack format, ideal for installations with limited space
Areas of use
PA
Corporate
Commercial environments
Hospitality (hotels, restaurants)
Conference rooms and multi-zone sound systems
Technical characteristics
- 4 amp channels
- Class-D amplifier technology
- 4 × 150 W @ 8 ohm
- 4 × 250 W @ 4 ohm
- BTW: 2 × 450 W @ 8 ohm
- Min. load impedance: 4 ohm per channel, 8 ohm in bridge mode
- Load parameter configurable within a range of 8 to 125 ohm with a precision of 0.1 ohm
- Fixed voltage output: 70 V (in bridged mode)
- DSP: ADI Sharc platform
- ADC: CS5361
- DAC: PCM4104
- OPA: NE5532
- Sampling rate: 24 bit 96 kHz
- Max input level: 19 dBu (6.904 V)
- Input sensitivity: 26 – 44 dB
- Frequency response: 20 Hz – 20 kHz (±0.5 dB) @ 1 W, 8 ohm
- THD+N: < 1% @ 1 W to full power
- SNR: 91 dB @ 32 dB gain
- Channel separation: < -83 dB @ 1 kHz, 0 dBu
- Input interface: 4 × Phoenix terminal
- Inputs: analog, AES67, AES3, pink noise, white noise, sine wave
- Outputs: 4 × Phoenix terminal outputs
- Control interfaces: Ethernet (TCP/IP), USB, RS485
- Network standard: 100BASE‑T, RJ45
- Display: 320 × 240 pixel, IPS color LCD
- Cooling: intelligent temperature‑controlled fan
- DSP matrix: 4 × 4
- Input EQ: 15‑band parametric EQ
- Output EQ: 10‑band parametric EQ
- Crossover: Butterworth / Bessel 6 – 48 dB, Linkwitz‑Riley 12 – 48 dB
- Input delay: 4 × 2000 ms
- Output delay: 4 × 2000 ms
- FIR filtering: 4 CH × 2048 taps
- DSP presets: 80 slots
- Configurable GPIO: 4 IO
- Wide voltage technology: 100 – 240 VAC 50/60 Hz
- Operating temperature: -20 to 60 °C
- Protections: limiter, over‑temperature, DC, HF, short‑circuit, BEMF, peak current, inrush current, power‑on delay, breaker, over/under voltage
- Dimensions: 22 × 4.45 × 30.5 cm (compact 1/2 rack)
- Weight: 2.5 kg
