Digital Power Amplifier, 2x 250 W @ 4 Ohm (2x 170 W @ 8 Ohm), 1x 500 W Bridged @ 8 Ohm (1U)
Premier Commercial Audio & Security
TOA : DA-250D
Description
The DA-250D from Toa Electronics is a high-quality 1RU digital amplifier designed for installed applications. It offers two channels of input and output, with removable terminal block inputs and a screw terminal strip for outputs. If desired, the first input channel signal can be routed to both outputs, perfect for multi-zone paging.
The front of the unit provides large control knobs for input level control, as well as LEDs to show input, output, power, peak, and protect status. The built-in protection circuitry protects against damages from short circuits, overloads, and overheating. Class-D circuitry provides excellent audio quality and allows the DA-250D to operate at 85 percent efficiency, so it consumes almost 1/3 less power than analog amplifiers.
Available Configurations Include:
| DA-250DH CU | Digital Power Amplifier, 2x 250 W @ 70V, 1x 500 W Bridged @ 140V (1U) |
| DA-250F CU | Digital Power Amplifier, 4x 250 W @ 4 ohms (4x 170 W @ 8 ohms), 2x 500 W Bridged @ 8 ohms (1U) |
| DA-250FH CU | Digital Power Amplifier, 4x 250 W @ 70V, 2x 500 W @ 140V (1U) |
Features
DA-250D features include:
- Sleek, 1RU unit fits into any standard audio rack
- Two channels of I/O, perfect for multiple zones
- Terminal block inputs and a screw terminal strip for outputs make it easy to connect equipment
- The channel 1 input may be routed to all outputs, perfect for paging
- Class-D circuitry for great audio quality and efficiency
- Independent power supply for each channel
- Simple interface with front-panel level control knobs
- Protection circuitry for short circuits, overheating, and overloads
- Status LEDs for power, input, output, peak, and protect
- Removable dust filters for easy cleaning
Specifications
| Output Power | 2x 250W (4 Ohms) 2 x 170W (8 Ohms) 1 x 500W (8 ohms) bridged 1 x 340W (16 Ohms) bridged |
| Frequency Response | 20Hz - 20kHz (±1dB) |
| Total Harmonic Distortion (THD) | 0.15% (1kHz) 0.3% (20Hz - 20kHz) |
| Input Sensitivity | +4dB (1.23V) or -10dB (0.24V) (Selectable with Inner Jumper) |
| Input Impedance | 10 kOhms, Electronically Balanced |
| Signal to Noise Ratio | 100dB |
| Connectors | 1 x AC Power Input 2 x 3-Pin Removable Terminal Block Input Connectors 1 x Screw Terminal Strip Output (2 Channels) |
| Controls | 1 x Power Switch 2 x Input Volume Control Knobs 2 x Bridge On/Off Buttons 1 x Ch1 Mode On/Off Button |
| Indicators | 1 x Blue Power LED 2 x Green Input LEDs 2 x Yellow Output LEDs 2 x Red Peak LEDs 2 x Red Protect LEDs |
| Power Requirements | 120VAC, 50/60Hz |
| Power Consumption | 420W, 5.9A |
| Dimensions (WxHxD) | 19 x 1.7 x 15.7" (482 x 44 x 401mm) |
| Weight | 11.02 lbs (5kg) |
Resources & Documents
| da-250d.pdf | Datasheet |