Crest CKD-1204, CKD-1208, CKD-604, CKD-608 Data Sheet

Decades of proven performance, reliability and intelligence converge in the Crest Audio CKd design made famous by the Crest Audio Pro 200

™

Series, combining the legendary overbuilt power supply

™

with NexSys® networking

functionality and an ultra-lightweight class D topology. The design centers

around an ultra-high efﬁ ciency ampliﬁ er output circuit which reduces weight while increasing output power, reliability and thermal efﬁ ciency.

The CKd Series offers four multi-channel models to meet the needs of demanding audio installations. The CKd 1208 and CKd 1204 provide 1,250 watts per channel in eight and four channels, respectively, while the CKd 608 and CKd 604 provide 625 watts per channel in eight and four channels

respectively. Each ampliﬁ er channel will operate to rated power in direct 70volt, 100-volt, 8-ohm or 4-ohm modes, conﬁ gurable per channel.

CKd ampliﬁ ers are networkable through the new Crest Audio Nx Dante-8

NexSys control module to the Crest Audio NexSys 5 and Peavey MediaMatrix

NWare™ software programs for advanced control and audio

™

routing. The Nx Dante-8 module ﬁ ts into the rear bay of CKd Series power

amps and supports all NexSys functions, DSP functions and Dante digital audio I/O via 1 Gigabit Ethernet connection.

A Control Voltage input is included on each channel to allow external gain control, while the Fault output on each channel allows the CKd power amps to be wired to other monitoring systems. In addition, users can conserve energy by disabling channels that are not in use.

The CKd Series includes Crest Audio’s exclusive ACL

™

(Active Clip Limiting),

which automatically reduces gain at the onset of clipping to prevent ampliﬁ er

and load damage, and IGM

™

(Instantaneous Gain Modulation), which

monitors load current to protect against overloading.

• Four multi-channel models: CKd-604, CKd-608, CKd-1204 and CKd-1208

• Ultra-lightweight class D topology

• CKd-1208 and CKd-1204 provide 1,250 watts per channel in eight and four channels respectively

• CKd-608 and CKd-604 provide 625 watts per channel in eight and four channels respectively

• Each ampliﬁ er channel will operate to rated power in direct 70-volt, 100- volt, 8-ohm or 4-ohm modes, conﬁ gurable per channel

• Networkable through Crest Audio to the Crest Audio NexSys 5 and Peavey MediaMatrix

Nx Dante-8™ NexSys control module

NWare™ software

programs for advanced control and audio routing

• Control Voltage input is included on each channel to allow external gain control

• Fault output on each channel allows CKd power amps to be wired to

other monitoring system

• CKd amplifers have the option to conserve energy by disabling

channels that are not in use

• Crest Audio’s exclusive ACL

™

(Instantaneous Gain Modulation) to protect against overloading

• IGM

™

(Active Clip Limiting)

CKd™ 1208 CKd™ 608 Ckd™ 1204 CKd™ 604

Rated Power @ 4 ohms (1kHz single channel driven) 1,400 watts per channel at <0.15% 750 watts per channel at <0.15% 1,400 watts per channel at <0.15% 750 watts per channel at <0.15% Rated Power @ 8 ohms (1kHz single channel driven) 1,300 watts per channel at <0.1% 750 watts per channel at <0.1% 1,300 watts per channel at <0.1% 750 watts per channel at <0.1% Rated Power @ 70.7 volts (1kHz single channel driven) 1,250 watts per channel at <0.15% 625 watts per channel at <0.15% 1,250 watts per channel at <0.15% 625 watts per channel at <0.15% Rated Power @ 100 volts (1kHz single channel driven) 1,250 watts per channel at <0.1% 625 watts per channel at <0.1% 1,250 watts per channel at <0.1% 625 watts per channel at <0.1%

Rated Power @ 4 ohms (all ch driven 50% duty cycle*) 1,250 watts per channel at 1kHz 650 watts per channel at 1kHz 1,250 watts per channel at 1kHz 650 watts per channel at 1kHz Rated Power @ 8 ohms (all ch driven 50% duty cycle*) 1,250 watts per channel at 1kHz 650 watts per channel at 1kHz 1,250 watts per channel at 1kHz 650 watts per channel at 1kHz Rated Power @ 70.7 volts (all ch driven 50% duty cycle*) 1,250 watts per channel at 1kHz 625 watts per channel at 1kHz 1,250 watts per channel at 1kHz 625 watts per channel at 1kHz Rated Power @ 100 volts (all ch driven 50% duty cycle*) 1,250 watts per channel at 1kHz 625 watts per channel at 1kHz 1,250 watts per channel at 1kHz 625 watts per channel at 1kHz

Minimum Load Impedance 4 ohms 4 ohms 4 ohms 4 ohms

Frequency Response (-.5 dB @ 1 watt (8 ohm load) 10 Hz - 20 kHz 10 Hz - 20 kHz 10 Hz - 20 kHz 10 Hz - 20 kHz

Damping Factor (8 ohms) >200:1 @ 20 Hz - 1 kHz >150:1 @ 20 Hz - 1 kHz >200:1 @ 20 Hz - 1 kHz >150:1 @ 20 Hz - 1 kHz

Input CMRR < -75 dB at 1kHz < -75 dB at 1kHz < -75 dB at 1kHz < -75 dB at 1kHz

Voltage Gain (Low Z) x 40 (32.0 dB) x 40 (32.0 dB) x 40 (32.0 dB) x 40 (32.0 dB) Voltage Gain (70v/100v) x 50 (34.0 dB) x 50 (34.0 dB) x 50 (34.0 dB) x 50 (34.0 dB)

High Pass Filter 70 Hz, 3rd order HPF 70 Hz, 3rd order HPF 70 Hz, 3rd order HPF 70 Hz, 3rd order HPF

Input Sensitivity (Low Z) 1.9V for 1 kHz 4-ohm rated power 1.27V for 1 kHz 4-ohm rated power 1.9V for 1 kHz 4-ohm rated power 1.27V for 1 kHz 4-ohm rated power

2.55V for 1 kHz 8-ohm rated power 1.8V for 1 kHz 8-ohm rated power 2.55V for 1 kHz 8-ohm rated power 1.8V for 1 kHz 8-ohm rated power

Input Sensitivity (70v/100v) 1.4V for 1 kHz (70V) 4-ohm rated power 1.4V for 1 kHz (70V) 4-ohm rated power 1.4V for 1 kHz (70V) 4-ohm rated power 1.4V for 1 kHz (70V) 4-ohm rated power

2.5V for 1 kHz (100V) 8-ohm rated power 2.5V for 1 kHz (100V) 8-ohm rated power 2.5V for 1 kHz (100V) 8-ohm rated power 2.5V for 1 kHz (100V) 8-ohm rated power

Input Impedance 20K Ohms balanced, 10K Ohms unbalanced 20K Ohms balanced, 10K Ohms unbalanced 20K Ohms balanced, 10K Ohms unbalanced 20K Ohms balanced, 10K Ohms unbalanced

Noise and Hum > - 95dB, “A” weighted reference > - 95dB, “A” weighted reference > - 95dB, “A” weighted reference > - 95dB, “A” weighted reference

to rated power @ 8 ohms to rated power @ 8 ohms to rated power @ 8 ohms to rated power @ 8 ohms

CURRENT CONSUMPTION ALL CHANNELS

Idle: 200 watts, 400VA 120 watts, 240VA 120 watts, 240VA 85 watts, 170VA

1/8 Power 8 ohms / 4 ohms: 1.6kW, 2.45kVA / 1.72kW, 2.7kVA .96kW, 1.47kVA / 1kW, 1.62kVA .96kW, 1.47kVA / 1kW, 1.62kVA .67kW, 1kVA / 700W, 1.14kVA 1/3 Power: 4kW, 6kVA / 4.4kW, 6.6kVA 2.4kW, 3.6kVA / 2.64kW, 4kVA 2.4kW, 3.6kVA / 2.64kW, 4kVA 1.7kW, 2.5kVA / 1.85kW, 2.8kVA

THERMAL EMISSION ALL CHANNELS (btu/hour)

Idle: 677 btu/hr 406 btu/hr 406 btu/hr 285 btu/hr

1/8 Power 8 ohms / 4 ohms: 1060 / 1170 636 / 700 636 / 700 445 / 490 1/3 Power 8 ohms / 4 ohms: 2115 / 2330 1270 / 1400 1270 / 1400 890 / 980

Cooling Temperature dependent variable speed 80mm DC fan

CONTROLS

Front: On/Standby/Remote AC Switch, 120V: two independent 21A circuit breakers, 230V: two independent 12A circuit breakers (per 4 channels) Rear: 8 channel input signal attenuators, 8 channel 100V/70V/LowZ selection switches, two 4 channel input signal attenuators, 4 channel 100V/70V/LowZ selection switches,

3-position connectors for STO In and STO Out, 8 Fault Relay outputs (NO/NC), 8 Control two 3-position connectors for STO In and STO Out, 4 Fault Relay outputs (NO/NC), 4 Control Voltage inputs, NexSys module bay Voltage inputs, NexSys module bay

INDICATOR LEDS

Front panel: 8 Mute, 8 Fault, 8 ACL/IGM, 8 Signal, 8 Active, 1 Power 4 Mute, 4 Fault, 4 ACL/IGM, 4 Signal, 4 Active, 1 Power Rear panel: 8 Mute, 8 Fault, 8 ACL/IGM, 8 Signal, 8 Active, 1 Power 4 Mute, 4 Fault, 4 ACL/IGM, 4 Signal, 4 Active, 1 Power

Protection (per channel) Over-temperature, DC, subsonic, incorrect loads, short-circuit, over-current

Unit Protection Over/Under AC Voltage, Fan operation

CONNECTORS Input: Eight 3-position Euro-style detachable terminal blocks Four 3-position Euro-style detachable terminal blocks Output: Four 4-position barrier strip terminal blocks with screws Two 4-position barrier strip terminal blocks with screws

Construction 14-gauge aluminum reinforced chassis with 12-gauge steel rack ears

DIMENSIONS Height: 3.48” (8.84 cm), 2 EIA rack spaces 3.48” (8.84 cm), 2 EIA rack spaces 3.48” (8.84 cm), 2 EIA rack spaces 3.48” (8.84 cm), 2 EIA rack spaces Width (front): 19.00” (48.26 cm) 19.00” (48.26 cm) 19.00” (48.26 cm) 19.00” (48.26 cm) Width (rear): 17.25” (43.82 cm) 17.25” (43.82 cm) 17.25” (43.82 cm) 17.25” (43.82 cm)

Overall depth: 20.30” (51.56 cm) 20.30” (51.56 cm) 20.30” (51.56 cm) 20.30” (51.56 cm)

Mounting depth: 19.70” (50.04 cm) behind front rack ears 19.70” (50.04 cm) behind front rack ears 19.70” (50.04 cm) behind front rack ears 19.70” (50.04 cm) behind front rack ears

Gross Weight 29.6 lbs (13.43 kg) 29.6 lbs (13.43 kg) 22 lbs (9.98 kg) 22 lbs (9.98 kg) Net Weight 34.6 lbs (15.7 kg) 34.6 lbs (15.7 kg) 25 lbs (11.4 kg) 25 lbs (11.4 kg)

Power Requirements 120 VAC 60 Hz or 230 VAC 50 Hz

* repetitive 1kHz cycles 50ms onset of clip and 50ms at 1/8 power

Crest Audio CKd 1208, 1204, 608 and 604 Power Ampliﬁ ers

The multi-channel power ampliﬁ ers shall be available in hardware conﬁ gurations of eight and four analog input channels and powered output channels. Each channel output shall be individually selectable as 8-ohm or 4-ohm low-impedance, or 70-volt or 100-volt constant voltage outputs. Input signals shall be connected via eight 3-position Euro-style detachable terminal blocks, and may be conﬁ gured as balanced or unbalanced inputs. Ampliﬁ ed outputs shall be connected via four 4-position barrier strip terminal blocks with screw terminals.

Each model conﬁ guration shall be capable of accepting and hosting either of two networked modules to support connection of CobraNet or Dante networked audio transport streams of four or eight channels. Audio, control and monitoring signals shall be conducted to and from the power ampliﬁ er via Ethernet connections.

The power ampliﬁ er sections shall be of a highly efﬁ cient and lightweight Class D ampliﬁ er design yielding 1,250 watts per channel or 650 watts per channel at 1kHZ with all channels driven at 50% duty cycle into 4-ohms or 8-ohms or 70.7 volts or 100 volts. Frequency response at 1 watt under an 8-ohm load shall be 10 Hz to 20 kHz.

Control voltage inputs shall be provided for each channel to allow for external gain control. Fault outputs on each channel shall be provided to allow monitoring of the operation of individual channels. Instantaneous Gain Modulation shall provide overload protection for each channel.

The multi-channel power ampliﬁ ers shall be the Crest Audio CKd-1208, CKd-1204, CKd-608 and CKd-604 power ampliﬁ ers.