Battery Operation - Adastra 952.931 Operation Manual

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OPERATION MANUAL - ADASTRA COMPACT AMPLIFIER

C A U T I O N

RISK OF ELECTRIC SHOCK

DO NOT OPEN

WARNING: SHOCK HAZARD - DO NOT OPEN

AVIS: RISQUE DE CHOC ELECTRIQUE - NE PAS OUVRIR

IMPORTANT

Then wires in the mains lead are coloured in accordance with the

following code:

Green & Yellow:

Earth

Blue:

Neutral (N)

Brown:

Live

Mains Connection

These units are designed to operate from 230V ac and are supplied with

an IEC mains lead. WARNING: Do not connect to the mains supply until

all input and output connections have been made.

Microphone Connection

MIC 1. On Model 952.931 (25W) this input is unbalanced and the

connector needs to be wired as follows :

6.3mm (balanced operation)

Tip: Signal (Live)

Sleeve: Screen

This input has the facility of being able to duck other inputs on the

presence of a signal when the VOX switch is activated.

With Model 952.934 ( 50W) MIC 1 input is balanced and can be wired

as follows:

XLR or 1/4" Stereo Jack Plug (Balanced Operation)

Tip: Signal (Live)

Ring: Signal (Return)

Sleeve: Screen

Pin1 Screen

Pin2 Signal (live)

Pin3 Signal (Return)

This input has VOX facility and the input can also accept a telephone

line level signal.

MIC 2. ( CH 2) is an unbalanced input on both models with the facility

of microphone or auxiliary input selection with the push switch on the

rear panel.

LINE Input (CH 3) is dual RCA phono sockets ( L & R )on rear panel and

is suitable for connection compact disc, cassette or tuner.

The RCA phono plug should be wired as follows :

RCA Phono Plug Connections

Sleeve-Screen

Pin- Signal

(E)

(L)

SLEEVE RING TIP

PUSH

SLEEVE PIN

WARNING: THIS APPLIANCE MUST BE

EARTHED

As the colours of the wires in the mains lead of this apparatus may

not correspond with the coloured markings identifying the terminals

in your plug proceed as follows: The wire which is coloured green and

yellow must be connected to the terminal which is marked by the

letter E or by the safety earth symbol or coloured green and yellow.

The wire which is coloured blue must be connected to the terminal

which is marked with the letter N or coloured black. The wire which

is coloured brown must be connected to the terminal which is marked

with the letter L or coloured Red. If a 13Amp (BS1363) plug or any

other type of plug is used, a 5 Amp fuse must be fitted either in the

plug or at the distribution board.

Slave Connection

Both the mixer amplifiers have a single RCA phono socket on the rear

panel to feed a signal to the slave ( booster) amplifier 952.938 or any

slave amplifier in the Adastra range.

The slave amplifier has two RCA phono sockets on the rear panel, one is

marked Slave IN for connection from a mixer amplifier and the other

socket is marked Slave OUT for connection to another booster

amplifier.

Loudspeaker Connection

All the models have provision for the connection of either 100V line or

low impedance loudspeakers. CAUTION: The two types must NEVER be

mixed on an installation.

100V Line

All the loudspeakers must wired in parallel and the sum of the power

taps must not exceed the rated power of the amplifier. It is

recommended to load the amplifier to 90% for speech and 70% for

music.

The 100V line should be connected to the COM and 100V terminals.

Low Impedance

Low impedance loudspeakers should be wired in such a way that the

load impedance presented to the amplifier is NEVER lower than 8 ohms

and connected to the COM and 8 ohm terminals. NOTE. Low impedance

loudspeakers require large gauge cable and short runs to minimise

losses.