The Ci Series is the next generation family of elevated efficiency amplification from Crest Audio. Ci amplifiers are designed to drive low-impedance or 70-volt speaker loads without bridging between channels. Bridged operations are supported for additional power into 8-ohm loads or 140-volt operation.
As with all Crest Audio products, sonic performance is of primary importance. In addition, high-efficiency, comprehensive load protection and compact packaging have been achieved in the Ci design.
The Ci Series amplifiers incorporate Crest Audio’s tried-andtrue modular approach to intelligent amplifier configuration. Through the provision of a single module bay, these amplifiers comes with a module that facilitates load monitoring, digital audio delivery and Crest Audio’s NexSys networking.
A full complement of features and options makes this series very versatile, whether powering airport systems, restaurant audio or a myriad of other applications. The Ci Series amplifiers bring a new generation of amplification to Crest Audio.
Features
- Four and eight-channel versions available (100-volts isolated outputs with optional accessories).
- Individual channels may be selected as low impedance or 70 volt
- Tour Class® protection
- Front and rear panel indicators for amplifier status
- Variable-speed fan
- Sequential turn-on standard
- Euro-style input connectors
- Barrier strip output connectors
- One controlled-voltage input per channel standard
- One fault relay per channel standard
- Module bay provided to input Nx module bay accessories for full amplifier control and monitoring via NexSys® 4 software or MediaMatrix® product and digital audio distribution
- 100- and 50-volt operation supported with external accessories
- EN60849 and ANSI60849 compliant with optional accessories
Specifications
- Frequency response 1W @ 8 ohms: 5 Hz to 20 kHz, +/-1 dB
- Power bw rated power @ 4 ohms, 1% THD+N: 20 Hz to 20 kHz, +/-1 dB
- THD + N: <0.02% @ rated power (@ 70 volt, 1kHz)
- Damping factor: 200:1 @ 8 ohms (20 Hz to 100 Hz)
- Input cMRR: >60 dB @ 1kHz
- Gain / input sensitivity @ 70 volts: 1.14 volts for full rated output power (70 volt switch selected)
- Gain / input sensitivity @ 8Ω: 1.0 volts for full rated output power (Low Z switch selected)
- Inputimpedance: >20 kohms balanced, >10 kohms unbalanced
- Hum and noise: > -97 dB, A-weighted below rated power @ 8 ohms
- Crosstalk: > -60 dB below max rated power (1 kHz)
- Power supply: Linear with toroid transformer
- Circuit breaker rating (120V/230V): 12A / 6A
- Current draw (120VAC) 1/8 power, 70 volts: 4.0A
- 1/3 power, 70 volts: 8.0A
- At idle: <2.0A
- Thermal emissions 1/3 Power, 70 volts btu / hr: 947
- Cooling: Front to side via variable speed fan
- Input connectors: balanced three-pin Euro-style (rear panel)
- Output connectors: barrier strips (rear panel)
- Power sequence connectors: 2 X three-pin Euro-style (rear panel)
- Fault connectors: three-pin Euro-style (rear panel)
- Control voltage connectors two-pin Euro-style (rear panel)
- Controls: front panel: three-position On / Off / Remote power switch rear panel: stepped attenuators, 70V/Low Z switch, dual/bridged switch, circuit breaker
- LED indicators: front and rear panels: Signal, ACL/IGM, Protect, Active, Power Present
- Construction: 16-gauge steel chassis, double thickness in rack ear areas
- Dimensions (h x w x d): 3.5" x 19" (front panel) 17" (chassis) x 17.3" (18.55" to rack ears)