Commercial Audio Series Mixer-Amplifiers

2Setup

2.15Block Diagram

Phantom Power

 

Pre-Announce

Pre-Announce

Pre-Announce Gain

Input Gain

 

 

 

 

 

 

Chim e

 

Mic/Line

Line

 

 

Mi c

 

 

 

[Bal]

 

 

 

 

 

SPI

 

 

 

 

 

 

 

CH 1

Tone Control

 

 

 

 

 

 

 

Ch 1 Normal

RCA

 

 

 

[SW1]

 

 

Gain 1

Bass

Trebl e

 

Input Gain

 

 

 

Mic/Line

Line

 

 

 

Mi c

 

 

 

[Bal]

 

 

 

 

 

SPI

 

 

 

 

 

 

 

CH 2

Tone Control

 

 

 

RCA

 

 

 

 

Gain 2Bass Trebl e

 

 

 

 

 

 

 

Ch 3 and Ch 4 similar to Ch

2

 

 

 

 

Input Gain

 

 

 

 

 

 

Mic/Line

 

 

 

 

Line

 

 

 

 

 

 

 

 

 

 

Mi c

 

 

 

 

 

 

[Bal]

 

 

 

 

SPI

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CH 5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Tone Control

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ch 5 Normal

RCA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

[SW5]

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Gain 5

 

Bass

Trebl e

 

 

Input Gain

 

 

 

 

 

 

Mic/Line

 

 

 

 

Line

 

 

 

 

 

 

 

 

 

 

Mi c

 

 

 

 

 

 

[Bal]

 

 

 

 

SPI

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CH 6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Tone Control

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RCA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Gain 6

 

Bass

Trebl e

Ch 7 and Ch 8 similar to Ch 6

280MA Block Diagram

 

 

 

 

 

 

 

 

 

 

 

 

 

Version 1.0

 

 

 

 

Preamp Line Out 1

 

 

 

 

 

 

 

SPI 1

Clip 1

 

 

 

 

 

 

AMP Out 1

 

 

 

 

 

 

 

 

 

 

 

Ch 1 Priority

 

 

 

Link

Ou t

 

 

 

 

Output

 

100V

 

[SW2]

 

 

 

 

 

Power

 

 

 

 

 

 

 

 

 

 

70V

 

 

 

 

 

 

 

Transformer

 

 

 

 

 

 

 

In

 

 

 

 

 

 

 

 

 

 

 

VCA

 

AMP 1

 

 

 

 

 

 

VC A

 

 

 

 

HP Filter

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4 Ohms

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Amp Input 1

 

 

 

 

 

 

 

 

COM

 

Ch 1 to Amp 1

 

 

 

 

 

 

 

Limiter

 

 

 

 

[SW9]

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Master 1

 

 

 

 

 

VCA 1

Scaling

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ch 1 to Amp 2

Mute

 

 

 

 

 

Tone Gen Level

 

 

 

 

 

 

 

 

 

 

 

Amp 1

 

 

 

 

 

 

[SW10]

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ch 2 to Amp 1

Ch 1 Amp

1

 

 

Z1

Authorized personnel only:

 

 

 

 

 

Tone

 

Remove internal jumpers Z1 and Z4

 

 

 

 

 

[SW11]

Priority

 

Bell

Generator

Z2

to disable tones for Amp 1

 

 

 

 

 

 

Ch 5 Amp

2

 

 

 

 

 

 

 

 

Z3

 

 

 

 

 

 

 

 

 

 

Alert

 

 

 

 

 

 

 

 

 

 

 

 

Evac

 

 

Z4

Authorized personnel only:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ch 2 to Amp 2

 

 

 

 

 

 

Remove internal jumpers Z2 and Z3

 

 

 

 

 

 

 

 

 

 

 

to disable tones for Amp 2

 

 

 

 

 

[SW12]

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Tone Gen Level

 

 

 

 

 

 

 

 

 

 

 

 

Amp 2

 

 

 

 

 

 

 

 

 

 

 

Preamp

 

 

 

 

 

 

 

 

 

 

 

SPI 2

Clip 2

Line Out

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ch 5 Priority

Mute

 

 

 

 

 

Link

Ou t

 

 

 

 

 

 

 

 

 

 

 

 

 

Power

 

[SW6]

 

 

 

 

 

 

 

In

 

 

 

 

 

 

 

 

 

 

HP Filter

AMP 2

 

 

 

 

 

Mute

 

VCA

 

VC A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ch 1 Over Ch

5

 

 

 

Amp Input 2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ch 5 to Amp 1

[SW 4]

 

 

 

 

 

 

 

 

 

 

Limiter

 

 

 

 

 

 

 

 

 

 

 

 

 

 

[SW17]

Priority

 

 

Master 2

 

 

 

 

 

 

 

 

 

 

 

 

VCA

2

 

Scaling

 

 

 

 

 

 

 

 

 

 

 

 

 

Ch 1 Over Ch

5

 

 

 

 

 

 

 

 

 

 

 

Ch 5 to Amp 2

[SW 3]

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

[SW18]

 

 

 

 

 

 

 

 

 

 

 

AMP Out

2

Ch 6 to Amp 1

 

 

 

 

 

 

 

 

 

Output

 

100V

 

[SW19]

 

 

 

 

 

 

 

 

 

 

70V

 

 

 

 

 

 

 

 

 

 

Transformer

 

4 Ohms

COM Ch 6 to Amp 2

[SW20]

 

Typical Signal Path, Amp 1

 

 

 

Typical Signal Path, Amp 2

Operation Manual

page 13

Page 13
Image 13
Crown Audio 180MA operation manual 280MA Block Diagram

180MA, 280MA specifications

Crown Audio has established itself as a leader in the professional audio industry, and its 280MA and 180MA models epitomize its commitment to high-quality sound reinforcement. These amplifiers are designed for a range of applications, including commercial audio, live sound, and installation, providing unmatched performance and reliability.

The Crown 280MA is a robust two-channel amplifier that delivers an impressive power output of 280 watts per channel at 4 ohms. Its engineering focuses on efficiency and clarity, making it an excellent choice for any scenario where quality audio is essential. One of its standout features is the built-in mixer, which allows users to connect multiple audio sources seamlessly. This mixing capability is especially beneficial in environments such as restaurants, schools, and places of worship, where different audio sources may need to be balanced and controlled easily.

On the other hand, the Crown 180MA offers a more compact design but does not compromise on performance. With a power output of 180 watts per channel at 4 ohms, this model is perfect for smaller venues or setups. Like the 280MA, the 180MA also includes a built-in mixer, ensuring versatile audio management. Both models feature a streamlined user interface, enabling intuitive operation and quick adjustments.

Both amplifiers incorporate advanced technology such as Crown's proprietary DriveCore technology, which enhances power efficiency while reducing distortion. This technology allows the amplifiers to deliver clean, transparent power without the weight typically associated with traditional designs. The lightweight nature of both models makes installation and transport straightforward, adding to their practicality for sound engineers and event organizers.

The overall construction of the 280MA and 180MA is rugged, built to withstand the rigors of professional use. Features such as short-circuit protection, thermal protection, and overload protection ensure long-term reliability, even in demanding environments. Furthermore, the amplifiers offer flexible input options, including line-level and microphone inputs, allowing users to connect various audio sources without hassle.

In conclusion, the Crown 280MA and 180MA amplifiers represent a perfect blend of power, efficiency, and advanced technology. Their built-in mixers, robust protection features, and lightweight designs make them highly versatile for a wide array of applications. Whether used in commercial settings or live sound environments, these amplifiers ensure that the audio experience remains top-notch, reinforcing Crown Audio's reputation as an industry leader.