Crest CLH-2500, CLH-5000 User Manual

The Crest Audio CLh™ Series power ampliﬁ ers set a new standard for

performance and efﬁ ciency for the contracting and installation market. CLh ampliﬁ ers feature an ultra-high efﬁ ciency ampliﬁ er output circuit that reduces weight while, increasing output power, reliability and thermal efﬁ ciency.

The Crest Audio CLh 5000 and CLh 2500 are ultra-high efﬁ ciency, servocontrolled, class-D power ampliﬁ ers that deliver high power through two channels to balanced outputs for the ultimate in common-mode noise cancellation

The Crest Audio CLh 6000C and 3000C provide the same high efﬁ cency high power but with Power Factor Corrections for world markets where PFC is required.The CLh 6000C and 3000C models operate on 230V/50 Hz power to drive 100V constant voltage systems.

The CLh 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; over-current protection; DC voltage; channel active and temperature warning. Additional features include a lightweight switch-mode power-supply, remote turn-on, sequential turn-on, and a switchable, built-in lowcut ﬁ lter.

• Ultra-high efﬁ ciency, servo-controlled, class-D power ampliﬁ ers that deliver high power through two channels

• CLh 5000 produces 2,500 watts per channel continuous at 70.7 volts

• CLh 2500 produces 1,250 watts per channel continuous at 70.7 volts

• CLh 6000C produces 3,745 watts per channel at 100 volts

• CLh 3000C produces 1,250 watts per channel at 100 volts

• Crest Audio’s exclusive ACL

™

(Active Clip Limiting)

• Over-current protection

• DC voltage

• Channel Active and temperature warning

• Light-weight switch-mode power supply

• Remote turn-on

• Sequential turn-on

• Switchable, built-in low-cut ﬁ lter

CLh™ 2500 CLh™ 5000 CLh™ 3000C CLh™ 6000C

Rated wat ts 2 c h x 4 ohms 1985 watts / 81 volts with 20ms repetitive burst 1985 watts / 89 volts with 20ms repet itive burst 2100 watts / 92 volts with 20ms repeti tive burst 3745 watt s / 100 volts with 20m s repet itive burst,310 0 watt s / 1470 watts / 77 volts at 0.15% THD, 1470 watts / 77 volts at 0.15% THD, 1500 watts / 77 volts at 0.25% THD, 7 9 vol ts a t 1% THD both channel driven @ 1kHz* (@2.67 ohms) both channe ls drive at 1kHz. both channe ls drive at 1kHz. both channe ls drive at 1kHz. both channe ls drive at 1kHz.

Rated wat ts 2 c h x 8 ohms 1175 watts / 97 volts with 20ms repeti tive burst 1175 watts / 97 volts with 20ms repetitive burst 1500 watts / 97 volts with 20ms repetitive burst 1250 wat ts / 100 volts with 20ms repetit ive burst 880 watts / 84 volts at 0.15% THD, 880 watts / 84 volts at 0.15% THD, 850 watts / 82 volts at 0.25% THD, 1150 watts / 96 volts at 0.25% THD, both channe ls drive at 1kHz. both channe ls drive at 1kHz. both channe ls drive at 1kHz. both channe ls drive at 1kHz.

Minim um Load Impe dance 4 ohms 2 ohms 4 ohms 2.67 ohms

Maxmium RMS Voltag e Swing 105 volts 105 volts 114 volts 114 volts

Frequency Response 20Hz - 22kHz; +/-0.5dB at 1 watt 20Hz - 22kHz; +/-0.5dB at 1 watt 20Hz - 25kHz; +/-0 dB, -3dB 20Hz - 25kHz; +/-0 dB, -3dB

20Hz - 20kHz 2ch x 4 ohms <0.15% @ 1400 watts 20Hz to 10kHz, <0.15% @ 1400 watts 20Hz to 10kHz, <0.2% @ 1400 watts 20Hz to 20kHz, <0.15% @ 18 00 watts 20Hz to 20kHz,

decrea sing to 1350 watts @ 20kHz, de creasing to 1350 watts @ 20kHz, both channel s d riven both channe ls driven both channe ls driven both channe ls driven

20Hz - 20kHz 2ch x 8 ohms <0.15% @ 860 watts 20Hz to 4kHz, < 0.15% @ 860watts 20Hz to 4kHz, < 0.15% @ 800 watts 20Hz to 4kHz, <0.15% @ 1000 watts 20Hz to 4kHz, increa sing to 1000 watts @ 20kHz, inc reasing to 1000 watts @ 20kHz, both channe ls driven both channe ls driven both channe ls driven both channe ls driven

Input CMR R > -75 dB at 1kHz > -75 dB at 1kHz > -75 dB at 1kHz > -75 dB at 1kHz

Voltag e G ain x 40 (+32dB) x 40 (+32dB) x 40 (+32dB) x 40 (+32dB)

Crosstalk >-6 0dB @ 1kHz @ 700 watts power @ 8 ohms >-60d B @ 1kHz @ 700 watts power @ 8 ohms >- 60dB @ 1kHz @ 10 00 watts power @ 8 ohms >-65dB @ 100Hz @ 1000 watts power @ 8 ohms

Hum and Noise >-10 0dB, “A” weighted refer enced >-100dB, “A” weighted referenced >-95 dB, “A” weighted referenced >-100dB, “A” weighted reference d

to rated power @ 4 ohms to rated power @ 4 ohms to rated power @ 8 ohms to rated power @ 4 ohms

Slew Rate >12V/µs >12V/µ s >12V/ µs >12V/ µs

Dampi ng Factor (8 ohms) >20 0:1 @ 20H z - 1 kHz @ 8 ohms >200:1 @ 20Hz - 1 kHz @ 8 ohms >200:1 @ 20Hz - 1 kHz @ 8 ohms >200:1 @ 20Hz - 1 kHz @ 8 ohms

Input Sensitivity 1.92 volts +/- 3% for 1 kHz 4 ohm rated power 1.95 volts +/- 3% for 1 kHz 4 o hm rated power 1.93 volts +/- 3% for 1 kHz 4 ohms rated power, 1.98 volt s +/ - 3% for 1 kHz 2.67 ohms rated power,

2.1 volts +/- 3% for 1 kHz 8 ohm rated power 1.83 volts +/- 3% for 1 kHz 8 ohm rated power 2.05 volts +/- 3% for 1 k Hz 8 ohms rated power 2.23 volts +/- 3% for 1 kHz 4 ohms rated power

Input Impedance 20 kilohms balanc ed and 10 kilohms unbalan ced 20 kilohm s balance d a nd 10 kilohms unbala nced 20 kiloh ms balanced and 10 kilohms unbalanced 20 kilohm s b alanced and 10 kilohms unbalanc ed

Current Draw @ 1/8 in VA (watts) 920 (525) @ 4 ohms, 625 (335) @ 8 ohms 1435 (89 0) @ 2 ohms, 920 (525) @ 4 ohms 725 (555) @ 4 ohms, 310 (235) @ 8 ohms 1570 (1035) @ 2.67 ohms, 1220 (780) @ 4 ohms

625 (335) @ 8 ohms 9 30 (440) @ 8 ohms

Current Draw @ 1/3 in VA (watts) 1880 (1200) @ 4 ohms, 1200 (715) @ 8 ohms 305 0 (215 5) @ 2 ohms, 1880 (1200) @ 4 ohms 1700 (1260) @ 4 ohms, 550 (420) @ 8 o hms 34 50 (2465) @ 2.67 ohms, 2200 (1500) @ 4 ohms 1200 (715) @ 8 ohms 1175 (740) @ 8 ohms

Idle Consumption: 195VA, 90 watts 195VA, 90 watts 155VA, 100 watts 205VA, 100 watts

Cooling 3 temperatu re depende nt v ariable speed fans

Controls 1 rear panel attenuator and select switc h f or 70Hz, high pass ﬁ lter per channel

Indicator LEDs Five LED indicators per channel: Active, Signal ,DDT, Temp erature, and DC

Protection Thermal, DC, subsonic , i ncorrect loads, unde r a nd over voltage

Connectors 3.81mm 12 position input , 5 mm 4 position sequ ential, 10 gauge wire 4 postio n o utput, IEC AC power

Construction 0.0062" thick alum inum\

Dimensions (HxWxD): 3 .48” x 19.0” (front) x 20.30 ” / 88. 39mm x 482.6mm x 515.62mm , 2 EIA rack spaces; Mounting dept h: 19.70” (500.3 8mm) behind fro nt rack ears

Net Weight: 14.1lbs / 6.4kg 14.1lbs / 6.4kg 14.1lbs / 6.4kg 14.1lbs / 6.4kg

*2.67 ohm steady state sin e wave power is time limited by circuit bre aker and AC limitati ons

Crest Audio CLh™ Power Ampliﬁ ers

The dual channel power ampliﬁ ers shall be available as two power levels in each of two power section conﬁ gurations for domestic and international applications. Each power level shall be capable of low-impedance outputs at 4- and 8-ohms or direct drive constant voltage outputs at 70.7V and 100V.

The power ampliﬁ er sections shall be of a highly efﬁ cient and lightweight Class D ampliﬁ er design with a heavy duty power supply. The power ampliﬁ ers shall yield 1,470 watts per channel into 4-ohms or 77 volts for domestic applications. The power ampliﬁ ers shall yield 3,745 watts per channel into 2.67-ohms or 100 volts with power factor correction, or 1,250 watts per channel into 8-ohms or 100 volts with power factor correction, for international applications. The power ampliﬁ ers’ frequency response at 1 watt shall be 20 Hz to 22 kHz.

Each power ampliﬁ er shall have rear mounted attenuators with removable knobs, power saving mode and provision for sequential turn-on. Inputs shall be via Euro-style connectors. Powered outputs shall be via touch-proof screw terminals. Each power ampliﬁ er shall be contained in a 2U steel chassis with rack mount hardware included.

The dual channel power ampliﬁ ers shall be the Crest Audio CLh 2500, CLh 5000, CLh 3000C and CLh 6000C power ampliﬁ ers.