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)
