Sugden a48 owners service manual

Page 2

OPERATION ,
Control facilities are provided by means of four knobs - BASS, TREBLE,
BALANCE, combined VOLUME - ON/OFF switch, and ten push buttons
on the front panel.

The push buttons, which are of independent push on and push off operation
offer facilities as follows:

INPUT SELECTION-this is controlled by the two extreme left hand
buttons allowing three selections to be made-

DISC button in magnetic cartridge
RADIO (DISC & AUX in) radio (stereo or mono)
AUX in auxiliary

The AUX facility has the same sensitivity as the RADIO input allowing the
use of an additional tuner or other high level programme source,

TAPE

To play pre- -recorded tape the TAPE button should be depressed. To record
from programme sources, e. g. disc or radio, it is necessary to depress those
input buttons normally required to select that source (as described above).
The selected input is automatically connected to the tape output socket. If
the output from the monitoring circuit on the tape recorder is connected to
the tape input of the amplifier, A-B monitoring is possible by depressing the
TAPE button.

Fl LTE\RS

The low frequency filter Is selected by depressing,the LF Filter button and IS
useful for removing rumble, traffic and wind noise from the programme
material. The turnover frequency is 70Hz and the rate of attenuation 18dB
per octaIIe. The high frequency filters are useful for removing distortion, hiss
and surface noise from poor programme material and are selected by depressing»
one or both of the HF filter buttons. The rate of attenuation or slope is 6dB
per octave and can be increased to 18dB per octave by depressing the steep
button. The button marked 7KHZ selects the 7KHz turnover frequency, the
IOKHz button the 10KH2 turnover frequency and both buttons together the
4KHz turnover frequency.

QUIET

The quiet button selects the quiet listening facility. Normal level should first
be set on the volume control and the quiet button depressed. The mid
frequency level will then be attenuated l6dB but the lower frequencies to a
less extent to cater for the equal subjective loudness effect of the ear. This
facility is useful for applications such as background music.

FUNCTION

The two end right hand buttons select as follows:-
STEREO (both buttons out) Stereo

LEFT in left handinput to both amplifiers
RIGHT in right hand input to both amplifiers
MONO (both buttons in) left and right hand inputs mixed to

both amplifiers.