Crest Audio CKi 400s Professional Installation Amplifier

With their proven track record, CKi amplifiers are designed for the most demanding contractor applications. With the ability to deliver audio, via CobraNet, and control on one CAT5 cable, the CKi series enables contractors and system designers to perform functions that other amplifier manufacturers simply cannot. By using Ethernet technology directly to the amplifier, the CKi series becomes an ultra scaleable system capable of economically powering anything from the smallest building to the largest theme park or stadium. FeaturesLegendary overbuilt power supply Rear-mounted attenuators with removable knobsEuro-style connection block, input and outputFront panel labeling areaSignal present, active, protect and ACL. LEDs (on front and rear of amplifier)PowerSave and sequential turn off (hardwired STO standard on all models)Fault I/O for connection to other monitoring systemsOptional input isolation transformers availableFive-year warrantyPowerSaveAll CKi amplifiers come standard with PowerSave circuitry.This effectively reduces currentdraw and thermal emissions to a minimum when the amplifier is at idle. PowerSave operates by cutting off the bias current to the output stage after absence of signal is sensed at the input.When signal presents itself, PowerSave instantly restores the bias current after the first positive-going waveform. Current draw specifications while PowerSave is active are included in specifications under "Idle Current Draw."

Specifications

Rated power bridge mode 4 Ohms: N/A

Rated power bridge mode 8 Ohms: 400 Watts @ 1 kHz at <0.1% T.H.D.

Rated power (2 x 2 Ohms): N/A

Rated power (2 x 4 Ohms): 300 Watts per channel @ 1 kHz at <0.05% T.H.D. both channels driven Rated power (2 x 8 Ohms): 200 Watts per channel @ 1 kHz at <0.025% T.H.D. both channels driven Minimum load impedance: 4 Ohms Maximum RMS voltage swing: 45 Volts Frequency response: 10 Hz - 20 kHz;+0,-2 dB at 1 Watt Power bandwidth: 10 Hz - 20 kHz; +0, -2 dB at rated 200 Watts 8 Ohm power T.H.D. (2 x 4 Ohms): <0.01% @ 300 Watts per channel from 20 Hz to 20 kHz Input CMRR: >-60 dB @ 1 kHz Crosstalk: >-60 dB @ 1 kHz at rated power @ 8 Ohms Hum and noise: >-105 dB,"A" weighted referenced to rated power @ 8 Ohms Damping factor (8 Ohms): >300:1 @ 20 Hz - 1 kHz Input sensitivity: (x 40) 1.0 Volts Ã?±3% for 4 Ohm rated powerInput sensitivity: (x 20) 2.0 Volts Ã?±3% for 4 Ohm rated powerInput impedance: 20 k Ohms balanced, 10 k Ohms unbalanced Current Draw @ 1/8 power: 5.8 Amps Current Draw @ 1/3 power: 8.6 AmpsClass: ABCountry of manufacture: United StatesCooling: Variable speed, front panel mounted, front-to-side airflow

Controls: On/Off/Remote switch (front panel), two attenuators,

AC mains circuit breaker, mode, gain, ground lift switches (rear panel

)Indicators: Signal, ACL (one per ch.), Protect,

Active Protection: ACL (active clip limiting), IGM (instantaneous gain modulation), thermal, load, DC voltage Connectors: 3-pin euro style for input, fault I/O, sequential turn on/off, barrier strip for output

Construction: Steel chassis, 16 guage. Double thickness in rack ear areas.

Dimensions: 89 mm x 483 mm x 435 mm (3.5" x 19" x 17.3)