The Cloud CA Series is a range of versatile multi-channel audio power amplifiers of advanced design, able to drive low impedance loudspeakers, or high impedance (100 V-line or 70 V-line) loudspeaker distribution systems directly. They are ideal for sound reinforcement applications in the retail, leisure, hospitality, commercial or industrial sectors.

Model CA2250 can deliver a maximum of 500 W of audio power, which may be similarly shared between its two channels.

Particular design attention has been paid to the amplifiers’ energy efficiency. The Class D output stages dispense with line output transformers, and consequently offer great savings in weight and size over earlier designs. An automatic, two-stage power-down feature (APD) resulting in power consumption of less than 2.5 W. The amplifiers also include a remote standby/wake up function, enabling them to be placed into standby mode - and subsequently powered up again - by a simple external contact closure. The APD feature can be disabled by a rear panel DIP switch.

Safety features of the design include output DC detection, overcurrent protection, and thermal monitoring. A switch on delay provides loudspeaker protection at power-up. All models use variable–speed forced-air cooling.

Product Features

• Output stage can drive 70 V/100 V-line systems directly (transformerless), or low impedance loudspeakers (≥4 ohms)
• Output mode selectable per-channel
• Balanced line level inputs
• Per-channel output level controls
• Per-channel rear panel input switches for input routing, high or low impedance operation, 70 V/100V -line selection and high-pass filter
• Automatic Power Down: <2.5 W power consumption with all channels quiescent
• Remote Power control input
• Global disable of APD function
• Variable speed forced-air cooling
• Thermal protection, overcurrent limiting and DC offset protection
• Switch-on delay for speaker protection during power-up
• Universal PSU – operates from 100 to 240 VAC

Product Specifications

Performance

• Output Power:
  • CA2250: total output power 500 W, both channels
  • CA2500/CA4250/CA6160/CA8125: total output power 1 kW, all channels
• Outputs:
  • Low-impedance: 4 ohms or 8 ohms (selectable)
  • High-impedance: 70 V or 100 V (rms)
• Frequency Response: 20 Hz to 20 kHz, +0 dB/-1 dB
• High Pass Filter: -3 dB @ 65 Hz via rear panel switches
• Distortion: 0.019%THD+N @1 kHz, 1 dB below rated output
• Noise: -94 dBr, 22 Hz to 22 kHz, relative to full power
• Crosstalk:
  • Ch1 to Ch2: < -98 dB @1 kHz, -79 dB @10 kHz
  • Other channel combinations: -107 dB @1 kHz, -98 dB @10 kHz (typical)

Inputs

• Connectors: 3-pole 3.5 mm-pitch plug-in screw-terminal connectors
• Sensitivity: 0 dBu (0.775 Vrms)
• Input Impedance: 10 kohms (balanced); 5 kohms (unbalanced)

General

• Output connectors: 2-pole 5 mm-pitch plug-in screw-terminal connectors
• Power input: 85 to 265 V AC, 50 to 60 Hz
• Mains protection:
  • Internal fuses:
    • CA2250: 1 x 250 V fuse, 20 x 5 mm, rating T4AH
    • CA2500, CA4250, CA6160, CA8125: 2 x 250 V fuses, 20 x 5 mm, rating T4AH
• Normal operating temperature 0 °C to 35 °C (Note performance and specifications cannot be guaranteed outside this range)
• Power Consumption
  • Standby & APD: 0.795 W (12.43 VA)
  • Mute: 11.24 W (21.09 VA)
  • Idle: 17.07 W (28.13 VA)
  • 1/8th power: 88.33 W (105.8 VA)
  • 1/3rd power: 200.9 W (213.5 VA)
• Heat loss
  • Standby & APD: 2.9 kJ/hr (2.7 BTU/hr)
  • Mute: 40.5 KJ/hr (38.4 BTU/hr)
  • Idle: 61.5 kJ/hr (58.3 BTU/hr)
  • 1/8th power: 91.7 kJ/hr (87.0 BTU/hr)
  • 1/3rd power: 122.5 kJ/hr (116.1 BTU/hr)
• Amplifier Protection
  • Overcurrent
  • DC
  • Thermal monitoring
  • Switch-on delay
• Status Indicators: Power applied, Protection active, Signal peak, and Signal present
• Cooling: Variable speed fan

Physical

• Dimensions (W x H x D):
  • Net
    • CA2250: 482.6 mm x 88 mm x 231.3 mm (19 in x 3.46 in x 9.11 in)
    • CA2500, CA4250, CA6160, CA8125: 482.6 mm x 88 mm x 381.8 mm (19 in x 3.46 in x 15.03 in)
  • Shipping
    • CA2250: tbc
    • CA2500, CA4250, CA6160, CA8125: 606 mm x 164 mm x 558 mm (23.9 in x 6.5 in x 22 in)
• Weight
  • Net
    • CA2250: 4.50 kg (10.1 lb)
    • CA2500: 6.75 kg (15.1 lb)
    • CA4250: 7.10 kg (15.9 lb)
    • CA6160: 7.55 kg (16.9lb)
    • CA8125: 7.95 kg (17.8 lb)
  • Shipping
    • CA2250: tbc
    • CA2500: 8.75 kg (15.1 lb)
    • CA4250: 9.10 kg (15.9 lb)
    • CA6160: 9.55 kg (16.9lb)
    • CA8125: 9.95 kg (17.8 lb)