The Cloud Electronics CA4250 four-channel audio power amplifier is rated at 4 x 250 watts and offers the ability to drive low impedance loudspeakers or high impedance (100 V-line or 70 V-line) loudspeaker distribution systems directly. Ideal for sound reinforcement applications in the retail, leisure, hospitality, commercial or industrial sectors.

Models CA4250, CA6160 and CA8125 are all capable of delivering 1 kW of audio power. In high impedance (70/100V-line) mode, this maximum power rating can be shared between channel pairs (odd & even) in an intelligent manner, allowing the amplifiers to drive different types or numbers of loudspeakers in various areas of a building or venue with maximum economy. This means that the CA4250 is able to share 500watts in any ratio between Channels 1&3 and another 500 watts between Channels 2&4.

The energy efficient 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) results in power consumption of less than 2.5 W. A remote standby/wake up function, enables the amplifier to be powered up or placed in to standby mode 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, thermal monitoring, switch on delay to protect loudspeakers at power-up & variable–speed forced-air cooling.

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
• Dante compatible with the optional Dante card - CDI-CA4.