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TOA DA-550F CU 4-Channel Class-D Rack Power Amplifier

TOA DA-550F CU 4-Channel Class-D Rack Power Amplifier

SoundPro Item: 207562 | Part Number: DA-550F CU

$3,294.00
$4,075.00 $3,294.00
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MSRP: $4,075.00 | MAP: $3,294.00

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  • Independent Power Supply Per Channel Eliminates Cross-Channel Interference
  • Per-Channel RJ-45 Control And Monitor Terminals Enable Remote System Integration
  • Recessed Front-Panel Attenuators With Security Covers Prevent Post-Commission Changes
  • Removable Front Dust Filters Allow In-Rack Maintenance Without Removing The Unit
  • Selectable Bridge Mode Per Channel Pair Adapts Output To Different Loudspeaker Loads
  • Two-Second Turn-On Relay Delay Protects Loudspeakers From Power-Cycle Transients
  • Comprehensive Protection Monitors Overload, Short Circuit, DC Offset, And Heat Sink Temps
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The TOA DA-550F CU is engineered for demanding installed sound and production environments where multi-channel power distribution, remote monitoring, and reliable long-term operation are non-negotiable. Its Class-D topology and switching power supply make it practical for racks where thermal management and weight are real constraints — integrators gain high output density without sacrificing control flexibility.

Each of the four channels operates from an independent power section, meaning a fault or bridged configuration on one pair has no effect on the remaining pair. The RJ-45 control/monitor terminals allow facility automation systems or custom control panels to switch individual channels on or off and report protection and fan status over runs up to 600 meters — a capability that distinguishes this amplifier in distributed system designs where the amp rack is not co-located with the operator position.

Front-panel recessed attenuators with optional security covers prevent accidental level changes after commissioning, and removable dust filters service without pulling the unit from the rack. A 2-second turn-on relay delay suppresses noise at the loudspeaker outputs during power cycling, which matters in permanently installed systems running sensitive transducers. Stack up to five units in a single rack without thermal spacing, and select per-pair bridging independently — giving system designers the configuration flexibility to match different loudspeaker loads across zones without additional hardware.

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Specifications

Audio
Rated Output (4-Channel, 4Ω)
550 W x 4
Rated Output (4-Channel, 8Ω)
350 W x 4
Rated Output (Bridged, 8Ω)
1100 W x 2
Frequency Response
20 - 20,000 Hz (-2 dB, +1 dB)
Total Harmonic Distortion (1 kHz)
0.1%
Total Harmonic Distortion (20-20,000 Hz)
0.15%
Signal To Noise Ratio
100 dB (A-weighted)
Crosstalk
70 dB (A-weighted)
Electrical
Power Source
120 V AC, 50/60 Hz
Amplification System
Class D
Power Consumption (Idle, UL/CSA)
480 W
Power Consumption (Rated Output, 4Ω)
2800 W
Power Consumption (Rated Output, 8Ω)
1650 W
Connectivity
Input Connectors
Removable terminal block (3-pin), XLR-3-31 type
Input Impedance
10 kΩ, electronically balanced
Input Sensitivity
+4 dBu (1.23 V) at maximum input level
Input Mode Switch
CH 1 to All channels or individual channel mode
Output Connectors
M4 screw terminal, barrier spacing 8.8 mm (0.35")
Control/Monitor Connectors
RJ-45 x 2 (CAT5-UTP)
Control/Monitor Max Cable Distance
600 m (656.17 yd)
Control Input
Photocoupler input, 9-14 V DC (12 V typical)
Monitor Output
Photocoupler open collector, 30 V DC max, under 12 mA
Construction
Panel Finish
Aluminum, black anodized
Case Finish
Plated steel sheet
Rack Size
2U (EIA standard)
Environmental
Operating Temperature
-10 °C to +40 °C (14 °F to 104 °F)
Operating Humidity
90% RH or less (no condensation)
Cooling
Forced air, front intake / rear exhaust
Protection Circuit
Overload, short circuit, DC offset, power amp heat sink >100°C, power supply heat sink >80°C
Indicators
LED Indicators
Power (blue) x1, Input (green) x4, Output (yellow) x4, Peak (red) x4, Protect (red) x4
Dimensions
Product Width
18.98"
Product Height
3.48"
Product Depth
15.91"
Dimensions (mm)
482 (W) x 88.4 (H) x 404.2 (D) mm
Weight
Product Weight
19.4 lbs (8.8 kg)
Package Weight
25.79 lbs
Shipping
Package Width
23.62"
Package Length
22.83"
Package Height
5.91"
Included Items
Included Accessories
Removable terminal plug (3-pin) x4, Tamper-proof cap x4
Identifiers
MPN
DA-550F CU

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