Operating Manual - SRA-120 Power Amplifier

SRA-120

Power

Channel 2

Protect

7.REAR PANEL FEATURES

7.1Inputs

The input of the SRA-120 amplifier is equipped with balanced 1/4" tip-ring-sleeve (TRS) phone jacks and balanced screw-terminal inputs. Each channel's connec- tors are internally wired in parallel and may be used with balanced or unbalanced connections. The nominal input impedance (balanced) is 20KΩ and the maximum input level is +22dBu.

Balanced Inputs

It is recommended that balanced input connec- tions be used whenever possible to reduce ground-loop and environment-induced hum and noise. The (+) signal is on the tip of the phone jack, the (-) signal is on the ring, and the shield is on the sleeve.

 

 

Tip (+)

 

 

 

 

Ring (-)

 

 

 

 

Sleeve (Ground)

 

 

 

 

 

Stereo Phone Plug

 

 

 

 

used for balanced

Pins are

2 = (+)

 

 

 

numbered

 

 

XLR Male

in the

3 = (-)

 

 

connector

1 = (gnd)

 

 

insert.

 

 

 

 

 

Input

Output

 

 

 

 

Terminal Strip

 

(-)

(+)

(-)

(+)

Chassis Ground

Signal Ground

Balanced Audio Connectors

Figure 7.1: Balanced Input Connections (recommended)

Unbalanced Inputs

If an unbalanced input connection is used, then the (-) connection should be connected to ground. Use of

amono (tip-sleeve) plug will automatically tie the (-) connection to ground. Never float (leave unconnected) pin 2 or pin 3 when using an unbalanced signal.

Input Ground

The CHASSIS GROUND terminal is internally connected to the chassis, the AC earth ground, and the power amplifier’s signal ground. The INPUT GROUND terminal is tied to the 1/4" jack's sleeve. It is recom- mended that the input and chassis ground terminals re- main connected with the factory-supplied jumper strap.

Tip (+)

Sleeve (Ground)

 

 

Mono Phone Plug

 

 

used for unbalanced

Pins are

2 = (+)

 

numbered

XLR Male

in the

3 = (gnd)

connector

1 = (gnd)

 

insert.

 

 

 

Input

Output

 

 

Terminal Strip

 

(gnd) (+)

(gnd) (+)

Chassis Ground

Signal Ground

Unbalanced Audio Connectors

Figure 7.1a: Unbalanced Input Connections

tput

 

Ch.1 Bridged Mode: Use Red Binding

 

 

 

 

 

 

 

 

 

Posts Only. Chan.2 is (+) and

Channel 2

Input is active balanced.

Channel 1 (Mono)

 

 

Chan. 1 is (-). Do Not Connect

If unbalanced connection is used,

 

 

Either Output to Ground.

Input

be sure to ground unused path.

Input

 

(+)

 

 

Stereo

Norm

0dB

(-)

(+)

(-)

(+)

Mono

Bridged

-10dB

 

 

 

 

(-)

 

Input

 

 

 

 

45W/Ch.@8

 

 

Input

 

 

60W/Ch.@4

Sensitivity

 

 

 

 

Ground

 

 

 

 

 

 

 

 

7

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Ashly SRA-120 manual Rear Panel Features, Balanced Inputs, Unbalanced Inputs, Input Ground

SRA-120 specifications

The Ashly SRA-120 is a powerful and versatile power amplifier designed for professional audio applications. Known for its reliability and exceptional sound quality, the SRA-120 stands out in various settings, including live sound reinforcement, installed sound systems, and mobile audio installations.

One of the key features of the Ashly SRA-120 is its robust power output. It delivers 120 watts per channel at 8 ohms, making it suitable for driving a range of speakers effectively. The amplifier can also produce 200 watts per channel at 4 ohms, ensuring ample power for more demanding situations where higher speaker sensitivity and increased volume are required.

The SRA-120 incorporates advanced thermal management and protection systems, which allow the amplifier to operate reliably under extended use without overheating. This feature is especially important for professionals who rely on consistent performance during lengthy events or in commercial applications. Additionally, the unit is equipped with short circuit, DC, and thermal protection to safeguard both the device and the connected speakers.

Another notable technology found in the SRA-120 is its low noise operation. The amplifier employs sophisticated circuitry which minimizes distortion and unwanted noise, essentially delivering a clearer and more detailed audio signal. This characteristic is particularly beneficial in environments where audio quality is of the utmost importance, such as theaters, auditoriums, and conference rooms.

Control and connectivity options enhance the usability of the Ashly SRA-120. It features balanced XLR and 1/4-inch inputs, making it easy to connect to various mixing consoles and audio sources. The amplifier also provides both binding post and Speakon outputs, allowing for flexibility in speaker connections and ensuring compatibility with various speaker types.

In terms of construction, the SRA-120 boasts a rugged design, making it suitable for both portable and permanent installations. It is housed in a lightweight yet durable chassis that can withstand the rigors of travel and extensive use.

Overall, the Ashly SRA-120 represents an excellent choice for audio professionals seeking a reliable, high-quality power amplifier with essential features and advanced technology, all while maintaining exceptional audio fidelity and performance in any setting.