Acoustical Manufacturing Co. Quad 34 지침서 - 페이지 7
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페이지 인쇄TAPE RECORDERS
MAINTENANGE
Volume
Balance
Mono
Bass LifUStep
Filters
Recording
Monitoring
Titt
Turn the VOLUME control knob until the required volume level is obtained.
Each step is approx. 4 dB at low levels and approx. 2 dB at high levels.
Adjust the BALANCE lever for correct interchannel sound balance. At the lim its
of its excursion it provides LH or RH channel output only.
When MONO is selected the LH and RH inputs are combined and the balance
control acts as a mono mixer. In the centre position the sum of both inputs is
fed to both loudspeakers. As the control is moved to either end the mix
progressively changes so at the limits the signal fed to the loudspeakers is
exclusively from the LH or RH input only.
This control operates exactly as its name implies by tilting the audio frequency
response about a centre point. This alters the overall sound balance without
introducing unwanted colouration by producing a very gradual change in
balance across the musical spectrum without changing the overall subjective
level. Six tilt positions are provided, three boosting treble and cutting bass, and
three cutting treble and boosting bass (see graph).
The LIFT positions provide three levels of smooth progressive boost for use
with small loudspeakers of limited bass response.
The STEP positions provide three levels of cut at low frequencies to remove
unwanted low frequency resonance without rolling off the extreme lower bass.
Extremely useful in removing the characteristic'honk'due
to room acoustics,
particularly when loudspeakers are placed in or near a corner (see graph).
Operated by three press buttons providing four positions of cut at high
frequencies to remove severe high frequency distortion without affecting the
musical information, mainly used to reduce tracing distortion from records.
Pressing either F1 or F2 alone willselect single pole filters operating from 11kHz
and 7 kHz respectively. Adding the SL button converts them to 2nd order
aperiodic filters at the same two frequencies, increasing the amount of high
frequency roll-off (see graph). The red LED's showwhich filtercombination
has
been selected, to canceljust press a filter button a second time.
A recorder may be connected to the tape sockets for recording from any input
source. To make a recording it is only necessary to set the recorder to record.
lf necessary a second recorder may be connected to the X1/X2 (unmarked)
sockets for recording from the disc, radio and CD inputs only (dubbing between
two recorders is not possible). lf required both recorders can be operated atthe
same time, in record only.
Select the source to be recorded (eg Radio, CD, etc) which will be heard through
the loudspeakers as well as being fed to the tape out sockets. Recording will
commence as soon as the recorder is started. Monitoring is possible by
pressing TAPE, the green LED will light. To return to listening to the source,
press TAPE again, the green LED willgo out.
Off tape monitoring is automatically provided from any input, when TAPE is
selected, via a three head recorder connected to the tape sockets.
No routine maintenance is required. lf necessary the case can be cleaned with
a soft brush or, for more stubborn marks, a slightly moistened lint-free cloth. In
this case remove the mains plug from the supply socket. Do not use cleaning
agents, solvents or abrasives.
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