Crest Audio Stereo Amplifier owner manual MA7120

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MA7120

1kHz, <0.03% THD+N

20Hz-20kHz, <0.1% THD+N

8Ω Bridged Mono Power

1150W

975W

4Ω Bridged Mono Power

1200W

1100W

 

 

 

Max RMS Output Voltage (bridged)

140V

 

Peak Output Voltage (bridged)

198V

 

Frequency Response (+0 / -0.3dB, 1W/8Ω )

20 Hz-20 kHz, -3dB @ 53kHz

 

 

 

 

Power Bandwidth (rated power at 4Ω , 1% THD+N)

20 Hz-20 kHz, +0/-0.2dB

 

Protection Circuitry

Clip Limit, IGM, AutoRamp, High Temp, short-circuit,

 

DC voltage, turn-on/off transient, sub/ultrasonic input.

THD+N (rated power, 1kHz)

<0.03%

 

SMPTE IMD (rated power at 8Ω , 60Hz & 7kHz)

<0.5%

 

 

 

 

Damping Factor (10-400Hz at 8Ω )

400:1

 

Input CMRR (1kHz)

>60 dB

 

Input Sensitivity (rated power at 4Ω bridged )

10.5V RMS for 1100W at 4Ω bridged

Voltage Gain

X6.3 (+16dB) bridged

 

Input Impedance (balanced)

>20kΩ

 

 

 

 

Hum and Noise (“A” weighted, full power, 4Ω )

>-100 dB

 

Crosstalk (“A” weighted, full power, 4Ω )

>-60dB

 

Class

H

 

Input Connectors (per channel)

Female XLR (pin 3+), Octal Socket

Output Connectors (per channel)

5-way output binding posts

 

Filter Storage

120,000 µF

 

Power Supply (factory configured)

100V–240V, 50–60Hz

 

Idle Current Draw (120V)

0.7A

 

1/8 Power Curr. Draw (typical music, 120V/4Ω )

3.9A

 

1/3 Power Curr. Draw (continuous music, 120V/4Ω )

7.75A

 

Max Curr. Draw (circuit breaker rating, 120V/4Ω )

15.0A

 

Thermal Emissions (1/8 Power, 4Ω )

2503 BTU/hr

 

Thermal Emissions (1/3 Power, 4Ω )

4505 BTU/hr

 

Cooling

Rear to front tunnel heatsink, 2 variable speed DC fans

Controls

Front panel: 2 attenuators, circuit breaker/power switch;

 

Rear panel: mode switch, signal ground lift jumper.

LED Indicators (per channel)

Clip/Limit, Signal, Temp/DC, Active

Construction

16 ga. single piece steel chassis, .187" (5mm) alum. front panel

Dimensions (Height x Width x Depth)

3.5"x19"x15" (16" to rear ears)

 

 

89mm x 483mm x 381mm (406mm to rear ears)

Gross Weight, Net Weight

57 lbs. (25.88 kg.), 52 lbs. (23.60 kg.)

Warranty

5 years, parts and labor†

 

† USA, Canada, U.K., and many other countries. Power figures are watts per channel, both channels driven. Crest Audio reserves the righ make improvements in manufacturing or design which may affect specifications Crest Audio specification literature is available in do

MA9130

8Ω Stereo Power

750W

720W

 

 

1kHz, <0.025% THD+N

20Hz-20kHz, <0.1% THD+N

 

 

 

 

 

4Ω Stereo Power

1225W

1200W

 

8Ω Bridged Mono Power

2450W

2250W

 

2Ω Stereo Power

1400W

1400W

 

4Ω Bridged Mono Power

2800W

2800W

Max RMS Output Voltage (each channel)

91V

 

Peak Output Voltage (each channel)

129V

 

Frequency Response (+0 / -0.3dB, 1W/8Ω )

20 Hz-20 kHz, -3dB @ 53kHz

 

Power Bandwidth (rated power at 4Ω , 1% THD+N)

20 Hz-20 kHz, +0/-0.2dB

 

 

Protection Circuitry

Clip Limit, IGM, AutoRamp, High Temp, short-circuit, DC volt-

 

 

age, turn-on/off transient, sub/ultrasonic input.

THD+N (rated power at 4Ω , 1kHz)

<0.025%

 

SMPTE IMD (rated power at 8Ω , 60Hz & 7kHz)

<0.1%

 

 

 

 

Damping Factor (10-400Hz at 8Ω )

400:1

 

 

Input CMRR (1kHz)

>60 dB

 

Input Sensitivity (rated power at 4Ω )

1.75V RMS

 

 

Voltage Gain

X14 (+23 dB)

 

 

Input Impedance (balanced)

>20kΩ

 

Hum and Noise (“A” weighted, full power, 4Ω )

> -100 dB

 

Crosstalk (“A” weighted, full power, 4Ω )

> -60dB

 

 

Class

H

 

Input Connectors (per channel)

Female XLR (pin 3+), Octal Socket

Output Connectors (per channel)

2 pair 5-way output binding posts

 

Filter Storage

70,000 µF

 

Power Supply (factory configured)

100V–240V, 50–60Hz

 

 

Idle Current Draw (240V)

0.8A

 

1/8 Power Curr. Draw (typical music, 240V/4Ω )

5.4A

 

1/3 Power Curr. Draw (continuous music, 240V/4Ω )

10.9A

 

Max Curr. Draw (circuit breaker rating, 240V/4Ω )

19.0A

 

Thermal Emissions (1/8 Power, 4Ω )

3380 BTU/hr

 

Thermal Emissions (1/3 Power, 4Ω )

6140 BTU/hr

 

 

Cooling

Rear to front tunnel heatsink, low-noise 2-speed fan

 

 

 

 

Controls

Front panel: 2 attenuators, circuit breaker/power switch;

 

 

Rear panel: mode switch, signal ground lift jumper.

LED Indicators (per channel)

Clip/Limit, Signal, Temp/DC, Active

 

Construction

14 ga. steel chassis, 0.25" (6mm) aluminum front panel

Dimensions (Height x Width x Depth)

5.25"x19"x15" (16" to rear ears)

 

 

133mm x 483mm x 381mm (406mm to rear ears)

 

Gross Weight, Net Weight

85 lbs. (38.6 kg.), 80 lbs. (36.0

kg.)

 

Warranty

5 years, parts and labor†

 

† USA, Canada, U.K., and many other countries. Power figures are watts per channel, both channels driven. Crest Audio reserves the righ

Crest Audio Pro Series Power Amplifiers

Appendix D

Image 31
Contents Including MA Series Amplifiers Important Precautions Table of Contents Unpacking IntroductionMounting Cooling Requirements Operating PrecautionsCrest Audio Model 7301 Power Amplifier Crest Audio Model 10004 Power AmplifierModel 4601 & 7001 Features Models 3301, 4801, 6001 FeaturesLowshighs Model 7301 Features8001 Model 8001 FeaturesModel 9001 Features Professional Power Amplifier Model 10001 FeaturesCh a Ch B Ch C Ch D Model 10004 FeaturesNexSys Connecting InputsConnecting Outputs Octal Accessory SocketsOperation Modes Connecting PowerSwitches & Controls Bridging PrecautionsProtection Features IndicatorsThermal Protection Speaker ProtectionService / Warranty Information Amplifier Maintenance and User ResponsibilityChannel a Appendix B General Amplifier Specifications Model 1kHz, 0.012% THD+N 20Hz-20kHz, 0.05% THD+N 8Ω Stereo Power 1kHz, 0.025% THD+N 20Hz-20kHz, 0.05% THD+N 8Ω Stereo Power 430W 400W 1kHz, 0.02% THD+N 20Hz-20kHz, 0.05% THD+N 8Ω Stereo Power Both Channels @ 4Ω 750W 720W 1kHz, 0.02% THD+N 20Hz-20kHz, 0.1% THD+N 8Ω Stereo Power 1Ω Stereo Power 4Ω Stereo Power x4 ch Appendix C Wire Gauge Charts MA5850 Appendix D Meyer-Compatible Power AmplifiersMA7120 Power is serious business

Stereo Amplifier specifications

The Crest Audio Stereo Amplifier has established a notable reputation in the audio industry, particularly among professionals seeking dependable and high-performance amplification solutions. Renowned for its robustness and exceptional sound quality, this amplifier is a popular choice for both live sound applications and studio settings.

One of the standout features of the Crest Audio Stereo Amplifier is its outstanding power output, which ensures that it can drive a wide range of loudspeakers with ease. Typically available in various power ratings, these amplifiers can provide significant wattage, allowing them to handle high-demand audio situations without distortion. This makes the Crest Audio amplifier an excellent choice for large venues, theaters, and event spaces.

The design of the Crest Audio Stereo Amplifier prioritizes efficiency and performance. Utilizing high-quality components, the amplifier is constructed with a rugged chassis and offers extensive heat dissipation to ensure longevity and reliability during prolonged use. This durability is particularly crucial in professional settings where equipment is often subjected to rigorous conditions.

In terms of technology, Crest Audio amplifiers incorporate advanced circuitry that enhances audio fidelity and minimizes noise. The use of Class AB amplification technology allows for a balanced performance that delivers both output power and audio clarity. This technology enables the amplifier to produce rich, warm tones, making it particularly effective for musical genres requiring dynamic range and precision, such as classical and jazz.

Another notable characteristic of the Crest Audio Stereo Amplifier is its comprehensive protection features. These amplifiers are designed with built-in thermal, short circuit, and overload protection, ensuring that the equipment can withstand potential hazards without compromising performance. The intuitive LED indicators provide visual feedback on the status of the amplifier, allowing users to monitor operation easily.

Connectivity is another essential factor, with Crest Audio amplifiers typically featuring a variety of input and output options. This flexibility enables integration with different audio systems, whether for simple stereo setups or complex multi-channel configurations. The professional-grade speakON and binding post outputs ensure secure connections to loudspeakers, promoting optimal performance.

Overall, the Crest Audio Stereo Amplifier is a reliable, high-performance solution for any audio professional. With its powerful output, sturdy construction, advanced technology, and user-friendly features, this amplifier continues to be a top choice for delivering exceptional sound quality in various applications. Whether in a studio environment or a live concert setting, the Crest Audio Stereo Amplifier stands out as a trusted tool for achieving audio excellence.