TOADA550F - TOA DA550F Quad Digital Power Amp 4x550W @ 4ohm 2U Image 1

The new DA Series digital multi-channel amplifiers are the latest addition to the TOA line of industry-standard audio products for installed sound. The DA Series is ideal for multi-zone distributed speaker systems and professional sound applications.

Engineered with Class D technology, the new DA Series amplifiers operate at 85 percent efficiency and consume almost one-third less power than conventional analog amplifiers. The compact and lightweight (14.6 lbs.) single rack-space design and ultra-low heat dissipation allow designers to rack-mount up to five units without open space between units.

Product Features

4x 350W (8 ohms) / 4x 550W (8 ohms) /4x 700W (16 ohms) 2x 1100W bridged mode (8 ohms)
Limiter
Class D design – 85% efficient!
30% lower power consumption than conventional amplifiers
Compact, 2U rack-space design
Stack up to 5 units without open spaces between units
Lightweight (9kg)
Independent power supply for each channel
Low heat dissipation
Recessed stepped attenuators
Comprehensive protection circuitry
Removable dust filters for easy maintenance
Optional isolation transformer, model MT-251h (DA-550FH only)

Product Specifications

General

Power Source: 220 - 240 V AC
Amplification System: Class D
Power Consumption:
- 480 W (based on EN standards)
- 2750 W (rated output 4 Ω × 4)
- 1550 W (rated output 8 Ω × 4)
Input:
- 4 circuits
- 10 kΩ
- XLR-3-31 type connector
- CH 1 mode ON/OFF switch (ON: CH 1 to All ch
Rated Output:
- 4 channels: 550 W × 4 (4 Ω)
- 2 channels (BRIDGE): 1100 W × 2 (8 Ω)
- M4 screw terminal
Frequency Response: 20 Hz - 20 kHz (-2 dB
Total Harmonic Distortion:
- 0.1 % (1 kHz)
- 0.15 % (20 Hz - 20 kHz)
Protection Circuit: Protection against excessive current flow due to overload unusual DC voltage output temperature rise at power amp. heat sink (100 ℃ (212 ゜F) or more) temperature rise at power supply heat sink (80 ℃ (176 ゜F) or more)
S/N Ratio: 100 dB (A-weighted)
Crosstalk: 70 dB (A-weighted)
Control/Monitor:
- Control input: Power ON/OFF status of the individual channels photocoupler input
- Monitor output: Power ON/OFF status of the individual channels
- Protection status of the individual channels
- Fan operation status photocoupler open collector output control current: 12 mA or less
- Connector: RJ-45 connector × 2
- Connection cable: Shielded Category 5 twisted pair cable for LAN (CAT5-STP)
- Maximum cable distance: 600 m (656.17 yd)
LED Indicator: Power (blue) × 1
Protect (red) × 4
Cooling: Forced air cooling
Operating Temperature: -10 ℃ to +40 ℃ (14 ゜F to 104 ゜F)
Operating Humidity: 90 %RH or less (no condensation)
Finish:
- Panel: Aluminum
- Case: Plated steel sheet