Description
Digital Amplifier
The DA 428 Digital Amplifier is a fully multi-channel power amplifier with extensive audio DSP functionality and four Class D power amplifiers of the latest generation. Practical operating gestures make the handling of even complex functions very easy, such as the preset settings on the device.
Amplification
In-house amplifier systems which ensure the optimum sound result with our speaker systems. Diverse DSP functionalities and intuitive operation also open the doors for driving loudspeakers beyond the K.M.E. world. For passionate sound results with enormous performance.
Application:
- controller power amplifier in fixed installations
- system operation with passive PA components (in actively separated PA systems)
- monitor applications
Optional features:
- optional TCP/IP remote module and Dante module available
- PresetEditor V2 software for creating and editing system presets
Specifications:
| max. Output power @ 4 / 8 ohms | 4x 700 / 400 W |
|---|---|
| Amplifier | four fully digital high efficiency power amplifiers ≥ 90% |
| Frequency range | 20 Hz – 20 kHz |
| S/N ratio (A-weighted /unweighted) | 100 / 95 dB |
| Input sensity at maximum level | analog 0 dB (775 mV) / digital -12 dBFS / without filters in output channel |
| Crosstalk @ 1 kHz | > 90 dB |
| Damping factor @ 1 kHz | > 500 |
| THD @ 1 kHz | < 0,5 % |
| Voltage gain @ 4 / 8 Ohm | 36,7 dB |
| Slew rate (internal) | > 70 V/µs |
| Slew time (internal) | < 1,5 µs/V |
| Features (elektronic) | per channel: gain, digital crossovers, subsonic filter, parametric EQs, dynamic processor, polarity, delay, matrix router |
| Protective circuits | for individual channels: short circuit, DC voltage at output, low impedance; for entire device: under/overvoltage, overtemperature, overload |
| max. Power consumption | 2600 W |
| Power requirements | 90 – 250 V / 50 – 60 Hz, PowerCon input |
| Operation modes | stereo, mono, 4-channel (free routing) |
| Control panel | ground-free switch, navigation pad, 4x encoders with push function, 4x RGB LEDs, LCD graphic display, SD card slot |
| Connectors | Line-In 4x XLR, Link-Out 4x XLR electronically balanced (max. 4x analog oder 2x digital & 2x analog); speaker output 4x Speakon NL4; RSNC module |
| DSP | 24 bit, 48 MHz clocked |
| Unit delay | < 1,5 ms |
| Sampling | 24 bit |
| Digital input & -link | inputs: AES/EBU & S/PDIF with format converter and sample rate converter (up to 192 kHz), link output: same as input format / 24 Bit, 48 kHz, AES/EBU |
| Preset memory | internal: 12 presets, more presets on SD card |
| Dimensions (W x H x D) | 483 x 88 x 375 mm (2 RU) |
| Weight | 8,5 kg |