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Product information "SMPS400A400"

The SMPS1200 represents a high-efficiency Safety Class 2 switch mode power supply meticulously engineered for compatibility with our UcD™, NCORE® and NCOREx® amplifier modules. Highlighted features encompass superior efficiency across the entire load spectrum, an exceptionally compact form factor, lightweight construction, and minimal radiated and conducted electromagnetic interference (EMI).

Additionally, the SMPS1200 boasts an advanced overcurrent protection mechanism that, during a temporary overload, restricts the output current. Only when the overload persists for an extended duration does the supply transition into hiccup mode, maintaining this state until the overload condition resolves. This attribute, in conjunction with substantial primary electrolytic buffer capacitors, enables the supply to deliver robust dynamic headroom power to the connected amplifier.

Furthermore, the SMPS1200 includes a symmetrical auxiliary output and a control circuit seamlessly interfacing with our UcD™, NCORE® and NCOREx® amplifier modules. Activation for routine operation or deactivation during a critical fault is managed through built-in actuators, ensuring a reliable safeguard. From the initial design phase to the final implementation, the SMPS1200 is optimized to achieve the lowest possible EMI signature, meeting the stringent demands of the most sophisticated audio applications.

The SMPS1200 is designed with a selectable input voltage range, allowing it to accommodate various power input specifications. This flexibility enhances its adaptability to different regions and power grid configurations, making it a versatile choice for international applications.

The SMPS1200 complies with relevant industry standards and certifications, ensuring that it meets the highest benchmarks for quality, safety, and performance. This commitment to standards reinforces its reliability in professional audio applications. Relevant standards: The SMPS1200A100, SMPS1200A180, SMPS1200A400 and SMPS1200A700 revision 1001 and higher fulfil the requirements of: IEC60065:2014 + A11:2017, IEC62368-1:2014 + A11:2017, UL62368-1:2014 Ed.2 and CSA C22.2#62368-1:2014 Ed.2. The SMPS1200 is an ETL listed component for the USA (UL62368-1:2014 Ed. 2) and Canada (CSA C22.2#62368-1:2014 Ed.2).


  • • High efficiency
  • • Small form factor
  • • Low EMI


  • • Selectable input voltage range
  • • Remote controlled operation
  • • 4 variants available:
    A100 / A180 / A400 / A700


  • • Advanced Overcurrent protection
  • • Over temperature protection
  • • DC detection input


  • • Active Loudspeakers, for home and professional use
  • • Power Amplifiers, for home and professional use
  • • Line Array and Immersive Systems
  • • Home Theatre Systems
  • • Multichannel Power Amplifiers
Family: SMPS Family
Automatic input voltage selection: No, Selectable with jumper
Mains voltage input: 230V / 115V
Max Output Power: 600W
Max Output Power @20Hz: 400W
SMPS Voltage +/-: 2 x 62Vdc

Recommended additional parts

UcD400HG with HxR
The UcD400HG amplifier module is a self-contained high-performance class D amplifier intended for a wide range of audio applications, ranging from Public Address systems to ultrahigh-fidelity replay systems for studio and home use. Chief distinguishing features are flat frequency response irrespective of load impedance, nearly frequency-independent distortion behaviour and very low radiated and conducted EMI. Control is based on a phase-shift controlled self-oscillating loop taking feedback only at the speaker output. FEATURES: • Pop-free start and stop control • Differential audio input • Clip indicator • Overcurrent and over voltage protection • No compromise components • LM4562 buffer OpAmp • HxR12 mounted • Ultra-low noice • Improved on-board buffer supply POSSIBLE APPLICATIONS: • Audiophile power amplifiers for home and professional use CONTENTS OF PACKAGING: • UcD400HG with HxR amplifier module • Mounting set UcD • Manual • Manual HxR