Rear Panel Features, Balanced Inputs | Ashly SRA-120 specification

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	2 = (+)			XLR Male
in the	3 = (-)			XLR Male
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	2 = (+)	XLR Male
in the	3 = (gnd)	XLR Male
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
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	Channel 2	If unbalanced connection is used,	Channel 1 (Mono)
		Either Output to Ground.	Input	be sure to ground unused path.	Input
	(+)		Input

Stereo	Norm	0dB	(-)	(+)	(-)	(+)
Mono	Bridged	-10dB
(-)		Input
45W/Ch.@8		Input		Input
60W/Ch.@4	Sensitivity			Input
60W/Ch.@4	Sensitivity			Ground
				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.