Sonodyne SC 2311 Bedienungsanleitung

Stereo-mixer-preamplifier owners manual

INTRODUCTION

Congratulations on your purchase of this unique preamplifier.

Our years of experience in installed sound has resulted in a feature-loaded device that will meet most

installed sound needs. The SC 2311 performs admirably as a line mixer with intuitive priority allocations

and overrides, and as a preamplifier, providing low noise, low distortion signals to your power/ booster

amplifiers. With 3 mic, 2 line ins, and a priority alarm in, it will make your installation a breeze to set-up

and operate. So go ahead and produce your signature sound with the SC 2311.

CONNECTIONS

All the XLR inputs and output sockets on the SC 2311 have the following pin configurations: 1 - GND, 2 -

HOT (+), 3 - COLD (-). All the TRS sockets on the back panel have the following pin configurations: TIP - HOT

(+), RING - COLD (-), SLEEVE - GND.

To connect any MIC with an XLR socket, simply use a 2-core MIC cable of the desired length having a male

XLR socket on one end which plugs into the MIC socket, and a male XLR socket on the other end which

connects to the preamplifier, following the pin connections stated above. There is no provision of

PHANTOM POWER.

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Introduction · Connections

SC 2311

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Operations

1. Keep POWER switch in OFF position

2. Make all input and output connections

3. Keep MIC 1 - MIC 3 controls at their minimum position, MIC/ LINE mixing control at its centre position,

BALANCE, BASS and TREBLE at their centre position, and VOLUME at its minimum position.

4. Keep line input selector in the position for which the input (AUX1 / AUX2) has been connected, and

MODE switch in the STEREO position. If you have a mono line input, keep mode switch in MONO

position.

5. Connect the mains cord to a 230V utility outlet.

6. Switch on power. The power indicator LED on the front panel will glow.

7. If you wish to check the mic first, advance the level control of the MIC that you have selected to about

2 O’Clock position, gradually turn up the volume while speaking into the mic. Adjust MIC level control

and/or volume control as desired.

8. To check line level, turn on source and adjust the volume control.

9. To mix Line and Mic, just carry out steps (7) and (8) together. To make the MIC input more prominent

than the LINE input, turn the MIC/ LINE mixing control counterclockwise, & vice versa.

10. SC2311 has priority ALARM input for fire alarm protection where if it senses signal it automatically

mutes all other inputs . Connect fire alarm or supervisory system output to the ALARM input . If MIC1

PRIORITY switch is pressed MIC1 will get priority over all the inputs ( except ALARM ) but, when the

ALARM signal is sensed ALARM gets priority. When ALARM or MIC 1signal is removed, the selected

line input is connected after a delay of 5 - 10 seconds.

We recommend that you test and adjust the level of the alarm source before setting it permanently,

so that the desired alarm level comes through the PA.

11. If you wish to use the PC soundcard output as the source, please use the AUX2 input. It has integral

protection for high voltage spikes or leakages that might occur when a PC soundcard is connected.

The PC earthing may not always be proper and we strongly suggest that you use AUX2 only, for

ensured system protection

SC 2311

FIG. 2 : REAR PANEL LAYOUT

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Fig 1: Front Panel · Fig 2: Rear Panel

FIG. 1 : FRONT PANEL LAYOUT

SC 2311

SYMPTOM: Power LED doesn’t glow/ no output

REMEDIES: Check that mains cord is plugged in. Check fuse on back panel. (For replacing fuse,

unscrew the fuse holder and replace fuse with exact equivalent)

SYMPTOM: Microphone inputs not working

REMEDIES: Check position of LINE/ MIC mixing level control. Move it to MIC position (extreme anti-

clockwise) if you do not want to mix with LINE input , check if the MIC1 priority switch is

depressed , if yes then only MIC1 will work when you try to use more than one microphone.

SYMPTOM: Hum present in system

REMEDIES: (A) Check that the earth terminal of the utility AC socket is connected to the earth bus

(B) Check that the earth is not shared with any other ‘noisy’ equipments like light dimmers,

arc lamps etc

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Troubleshooting

SC 2311

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Architects & Engineering Specifications

The stereo preamplifier shall provide low-noise, low distortion preamplification, switching and signal

processing for permanent installation or sound reinforcement applications. The preamplifier shall have 3

MIC inputs and 3 stereo line level inputs (1 balanced, 2 unbalanced). Out of the 3 stereo line level inputs,

one pair shall be a balanced input via TRS socket (AUX 1) and the remaining two pairs shall be unbalanced

inputs via RCA socket (AUX2, ALARM) . Out of these inputs, one pair shall be a priority input (ALARM) which

shall override all inputs. MIC1 is 2nd priority input which gets priority on rest of the inputs (except ALARM)

provided that the MIC1 PRIORITY switch is depressed (accessible from the rear panel).The line level inputs

shall be switch-selectable (AUX1/AUX2) provided on the front panel. The MIC inputs shall have individual

level controls. There shall be a mixing control to control the relative signal strength between MIC and LINE

inputs. The preamplifier shall feature a Baxandall type bass - treble control and a master volume control

together with a balance control for left and right channels. There shall be a mode switch on the front panel

to switch between mono and stereo mode. All MIC inputs shall be female XLR type and all balanced inputs

shall be TRS type. All unbalanced inputs shall be RCA type. Pin connections of XLR and TRS type shall

conform to international standards.

The preamplifier shall have 2 stereo outputs out of which one is a balanced output via TRS socket (L&R)

and a unbalanced output via RCA socket (PREOUT).

The preamplifier shall be a Class I equipment with a 3-pin molded plug to suit 230V AC outlets. Switching

off power shall be controlled by a front panel mounted rocker switch with an LED power-on indicator.

Protection shall be provided by a rear panel mounted glass cartridge fuse and fuse holder.

The preamplifier shall be the SONODYNE model SC 2311.

SC 2311

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SC 2311

Specifications

DESCRIPTION Professional stereo mixer preamplifier

INPUTS 3 Mic inputs (fully balanced) via XLR socket

1 balanced stereo line level input via TRS (AUX 1)

2 unbalanced stereo line level inputs via RCA socket as follows :

AUX 2 (L&R), ALARM (L&R)

OUTPUTS 1 unbalanced line level stereo RCA output

1 balanced line level stereo TRS outputs

CONTROLS AND SWITCHES Master volume control, Balance, Bass, Treble, Mic/ Line MIX Control, individual Mic

level controls, selector switches for AUX1 & AUX2, STEREO/MONO mode selection

switch, one power switch & one rear panel accessible priority control switch which

provides priority to MIC 1 over all channels except ALARM

FREQUENCY RESPONSE 10 Hz ~ 20 kHz, ±3 dB

INPUT SENSITIVITY Aux 1 - 140 mV

(For 1V output) Aux 2 - 130 mV

Alarm - 180 mV

Mic - 2 mV

INPUT IMPEDANCES Aux 1 - 44k Ohm (balanced)

Aux 2 - 47k Ohm

Alarm - 10k Ohm

Mic - 1k Ohm (balanced)

CROSS TALK (1 kHz) Better than 65 dB

CHANNEL SEPARATION (1 kHz) 55 dB

S/N RE(MIC/LINE) 5 V OUTPUT Better than 85 dB

TOTAL HARMONIC DISTORTION 0.02% @ 1 kHz

BASS ± 10 dB at 100 Hz

TREBLE ± 10 dB at 10 kHz

POWER REQUIREMENT 230 V AC @ 50 Hz

POWER CONSUMPTION 15 V A max

DIMENSIONS (W x H x D) mm 483 x 44 x 168

NET WEIGHT 2.3 Kg Due to continuous improvements, specifications may change

A product of Mukherjee Innovation Centre

Manufactured by Sonodyne Electronics Co Pvt Ltd, 98 NB Block E New Alipore, Kolkata 700053, INDIA

Tel: +91 33 23990418, 23983406; Fax: +91 33 23967243; E-mail: [email protected]

Please visit us at www.sonodyne.com

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