DPX-300S
1-Channel Digital Power Amplifier
Product Description
The Inter-M DPX-300S is a reliable and energy-efficient single-channel 300W Class-D digital power amplifier, designed for seamless integration into professional public address and emergency paging systems.
Housed in a compact 1U rack-mount enclosure, the DPX-300S delivers clean, stable 300W output on 70V or 100V line systems. Its advanced Class-D amplifier design, paired with a high-efficiency SMPS power supply, ensures reduced heat generation and lower power consumption.
The unit features AC mains and DC 24V backup input, allowing it to remain operational during mains failure using an emergency broadcast battery. A dedicated PRIORITY input automatically overrides all other inputs in the event of an emergency, ensuring crucial alerts are heard without delay.
It offers extensive protection circuitry to defend against faults including overheat, output short, DC offset, reverse voltage, and ground faults. The front panel LED indicators provide clear, at-a-glance monitoring for input levels, clipping, protection status, and power mode.
Compact, durable, and built with system integration in mind, the DPX-300S is ideal for installers and specifiers working on dependable public safety and background audio systems.
- Single-channel 300W (70V/100V line) Class-D amplifier
- Compact 1U rack-mountable enclosure
- AC mains and DC 24V dual power operation
- Emergency PRIORITY input for alert override
- Full fault protection: overheat, short, reverse voltage, DC output
- Signal, clip, protection, and fault LED indicators
- Remote contact power switching
- Audio link connector
- Internal buzzer with on/off setting
- Efficient high-output SMPS power supply
| Description | DPX-300S |
|---|---|
| Rated Output Power | 300W × 1CH |
| Output Voltage / Impedance | 100V / 33.3Ω, 70V / 16.3Ω |
| Frequency Response | 50Hz ~ 20kHz (±3dB) |
| THD (Rated Power) | Less than 1% |
| Signal-to-Noise Ratio | More than 95dB (A-weighted) |
| Input Sensitivity / Impedance | 0 dBV / 20kΩ |
| Operating Power | |
| Power Consumption (1/8 Power) | 150W |
| Dimensions | 482(W) × 44(H) × 420(D) mm |
| Weight (Net) | 7.30kg |
| Weight (Gross) | 8.30kg |
