Ashly SRA-120 Посібник з експлуатації - Сторінка 6

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Operating Manual - SRA-120 Power Amplifier

SRA-120

Stereo

Power Amplifier

FRONT PANEL FEATURES

6.1

Power Switch

When the unit is switched on there is a 2 second

delay, during which time the PROTECT circuit will acti-

vate. The load is disconnected during this power-up se-

quence . When turning off the amplifier, the load is re-

moved instantly, and the protect LED will briefly turn on

as the power supply discharges.

6.2

Level Controls

Front panel level controls allow precise indepen-

dent input level attenuation to the power amp sections.

When in mono or bridged mode, channel 1 controls both

power amp channels. We recommend setting these con-

trols full CW and controlling system gain at the mixer or

preamp instead.

6.3

Signal Present Indicators

Green signal present LED's indicate the presence

(about 30dB below maximum output) of signals into the

power amp circuitry.

6.4

Clipping Indicators

Clipping occurs when the signal peak levels ex-

tend beyond the available power supply rails, essentially

"cutting off" the crest portion of the waveform. This pro-

duces signal distortion and can potentially damage driv-

ers, as the signal begins to look like a square wave. The

red CLIP LED's illuminate at the onset of clipping, and

accurately track both the output load and the AC line volt-

age.

Level (dB)

-1

-3

-6

Protect

-10

Channel 1

(Mono)

6.5

activated during extreme fault conditions, as well as dur-

ing power-up and power-down. When in protect mode, as

indicated by the red LED, the speaker output terminals

are internally disconnected. Conditions causing the am-

plifier to switch into protect mode include the following:

one second of removal of the fault condition. In the event

of overheating, it may take several minutes for the am-

plifier to reset. If thermal shutdown occurs, check to see

if the cooling fins have access to fresh air.

6.6

impedance stereo headphones. Channel 1 is connected

to the 1/4" jack tip contact and channel 2 is connected to

the ring.

SRA-120

Made In USA

TO REDUCE THE RISK OF ELE CTRIC SHOCK DO NOT REMOVE

COVER.

NO USER SERVICEABLE PARTS INSIDE.

SERVICING TO QUAL IFIED SERVICE PERSONNEL. TO REDUCE

THE RISK OF FIRE REPLACE ONLY WI TH SAME T YPE FUSE.

TO REDUCE T HE RISK OF FIRE OR ELECTRIC SHOCK DO NOT

EXPOSE T HIS EQUIPMENT TO RAIN OR MOISTURE.

AVIS:

RISQUE DE CHOC ELECTRIQUE -

NE PAS OUVRIR.

Level (dB)

-1

-3

-6

-20

Sig. Clip

-10

Channel 2

Protect Indicators

Protect mode in the SRA-120 is automatically

Turn-on delay/Instant turn off

Output short circuit

Load impedance below 2 ohms

DC at output (below 8Hz)

Ultrasonic signal (above 20KHz)

Amplifier overheating

Each channel automatically resets itself within

Headphone Jack

The Stereo headphone output jack will drive any

REFER

Stereo

Headphones

Ch.2

MDA 3A

120VAC

50-60Hz

350W

Outp