Adcom GFP-345 - Manual (Page 5)

CD O
This set of input jacks is for use with a Compact Disc (CD) player or other similar high-level signal source, such as a tape
player, the audio signal from a video-disc player, or video-cassette recorder (VCR). The load impedance of this Input is
approximately 22,000 ohms.
TUNER O
Although this pair of inputs is provided for your tuner, they may be used with any other high-level source such as a tape
player, an additional Compact Disc (CD) player or other similar high-level signal source. The load impedance of this input
is identical to that of the CD e input.
AUX 2 O
This pair of inputs is provided for any other high-level source you may have available such as a tape player, an additional
Conmact Disc (CD) player or other similar high-level source. The load impedance of this input is identical to that of the
CD O input.
TAPE IN O
This set of tape inputs is identical in sensitivity and electrical characteristics to the CD
e
inputs and the comments made
about the CD
O
inputs apply. These may be used not only for cassette or other audio tape recorders (such as DAT or
DCC), but also with any high-level signal source such as a VCR's audio outputs, etc.
If you desire simple playback of prerecorded tapes, plug the left and right outputs of your tape machine labelled “tape
out” or "line out” into the TAPE IN O jacks using a set of good-quality, low-loss audio cables. To select playback of tape,
push in the TAPE MON O switch on the front panel of the GFF^345. Whenever the TAPE MON O is activated the LED
directly above it will glow. Also, whenever the TAPE MON ® switch is pushed in the INPUT O selector will be
disconnected from the circuit. That is, whatever source has been selected through the INPUT 0 selector will be
disconnected from the circuits of the GFP-345 and will be supplanted by the source, or tape recorder, plugged into the
TAPE IN O jacks on the rear panel of the preamplifier.
TAPE OUT O
Whichever input is selected via the INPUT 0 selector knob will appear at the TAPE OUT O jacks. It should be pointed
out that regardless of the position the TAPE MON
0
switch is in, whatever source is selected via the INPUT
0
selector
will still appear at the TAPE OUT O jacks. The TAPE MON 0 switch only controls the playback circuits of the GFP-345.
Also, please note that if you are monitoring a recording which is being made on a tape or cassette machine, by using the
TAPE MON 0 function, you must leave the INPUT
0
selector on the source selected for recording or the recording
process will be interrupted: that is, the changing of source selection through the INPUT
0
selector switch will interrupt
the signal being fed to the tape or cassette recorder via the TAPE OUT e jacks. To hook-up the TAPE OUT o to your
cassette or tape recorder, connect the right and left jacks on the cassette or tape recorder labelled “line in" or "record in"
to the corresponding LEFT CHANNEL and RIGHT CHANNEL TAPE OUT
O
jacks on the rear panel on the GFP-345. It
is very important that you use only high-quality, low-loss interconnecting cables in order not to degrade the quality of the
recording.
NOTE
The TAPE OUT О circuits are actively “buffered" in order to insure that the signal with in the ci rcuitry of the GFP-
345 will not be compromised regardless of whether the tape recorder is in use or not. Therefore, you can listen
to the source which you are recording without fear of degrading the signal either in the recording or the listening
mode. In addition, the buffered outputs will prevent the normal degradation that tape recorder inputs cause an
audio signal in a preamplifier when the tape recorder circuits are turned off and not in operation.
EXTERNAL PROCESSOR IN O/ EXTERNAL PROCESSOR OUT O
This set of inputs and outputs is provided for use with any "signalprocessor" such as an equalizer, time-delay unit,
surround-sound
decoder, etc. The EXTERNAL PROCESSOR IN © / EXTERNAL PROCESSOR OUT © jacks are
selected and controlled by the front-panel button iabelled EXT PROC 0. Pushing in the EXT PROC 0 button will
connect
whatever processor is plugged into the EXTERNAL PROCESSOR IN ©/EXTERNAL PROCESSOR OUT
e
jacks to the circuitry of the GFP-345. Whenever the EXT PROC
0
button is pushed In, activating this circuit, the red
LED above it will glow. Pushing and releasing the EXT PROC
0
button will disconnect the EXTERNAL PROCESSOR IN
O/EXTERNAL PROCESSOR OUT
0
jacks from the circuitry of the preamplifier. It is important to note that when the
EXT PROC
0
button is released, both sets of jacks (EXTERNAL PROCESSOR IN ©/EXTERNAL PROCESSOR OUT ©)
are electrically removed from the circuitry of the preamplifier (and, so, consequently whatever processor is plugged into
these jacks) to prevent any possible degradation of the signal selected through the INPUT
0
selector switch.