Adcom GTP-600 - Manual (Page 14)

20) TONE CONTROLS: ADCOM's tone controls (®& ©) are far more subtle than similar controls on competitive
units. While conventional controls affect large portions of the midrange in addition to either bass or treble, ADCOM’s
circuits affect only the frequency extremes and leave the critical midrange virtually untouched.
The benefit is that musical clarity is unchanged even when you select large amounts of tonal compensation. For
video applications, this design has the advantage of not decreasing dialog intelligibility.
For absolute sonic purity, these circuits are bypassed until the Tone in button o is pressed.
21) BALANCE CONTROL: The balance control © adjusts for unequal volume levels between the front left and front
right channels.
To use it accurately, select the Bypass operating mode (no surround mode LEDs lighted.) Use a mono source (or
press the Mono switch © to the "In” position) and adjust the balance control until the sound appears to originate
from a point centered between the front left and front right speakers. The final position of the balance knob will
vary depending on room acoustics and your listening/viewing position.
22) VOLUME CONTROL: This knob © controls a precision 6-segment potentiometer that determines loudspeaker
and headphone volume. The control features "stepless" operation for precise gain adjustment.
The LED located on the outer edge of the knob’s front surface glows steadily during normal operation. When
Audio mute Q is engaged, the LED flashes at 0.5 second intervals as a reminder. CAUTION; Do not disengage
Audio mute while the Volume control is set higher than approximately 10:00 O’clock.
23) AUDIO MUTE CONTROL ©; This control fully mutes the GTP-600’s main and headphone outputs. This is in
contrast to most competitive circuits that simply reduce the output by an arbitrary fraction. This conventional
approach is problematic in that our ears perceive loudness in a relative rather than an absolute way. Circuits that
simply reduce gain have a different subjective effect depending on the original position of the volume control:
ADCOM’s infinite attenuation circuit has the same subjective effect at any volume control position.
24) MONO SWITCH ©; This has several uses. As stated before, you can decrease the background noise of weaker
stereo EM signals by pressing this switch. (Actually, you should first use the High blend button. If that doesn’t
screen enough noise out of the signal, try Mono. In addition. Mono is used whenever you need a monaural signal
in Bypass (2 channel stereo) mode to properly phase left and right loudspeakers, etc.
25) THE REMOTE CONTROL: Basic operating instructions for the RC-65 hand held controller are on the back of the
RC-65. Please refer to them as needed.
The RC-65 has three operating modes: Remote Operation, Learn and Delete. Command codes for the GTP-600
and ADCOM CD players are already preprogrammed into the RC-65’s non-volatile memory; These ADCOM-
specific commands CAN NOT be erased.
Flowever, non-ADCOM codes can be programmed into the RC-65 to supersede the ADCOM codes if desired. In
addition, other non-dedicated keys can also be programmed. This allows you to teach the RC-65 commands for
up to eight other components and use it as the remote controller for a complex audio/video home entertainment
system. Of course, the RC-65 can also be “deprogrammed” and then "reprogrammed” with new commands
when you change components.
A) To use the RC-65 as a dedicated remote controller for the GTP-600 and other ADCOM components, follow
these instructions;
1) Select the desired source by pressing the proper Input Selector button ®. The Transmit LED © flashes
to confirm.
2) Select the desired function for that source by pressing the appropriate command key. The transmit LED
flashes.
For example, if you want to turn on the GTP-600, select the CD input and start playing disc 4 in a GCD-600,
press
Power ©, press CD ®, press Play ®, press Disc ©, then press “0” and “4” on the numeric keypad
©
B) To program the RC-65 with commands for other components;
1) Place the RC-65 and other remote controller so that the infrared transmitter elements face each other —
usually this is a “top to top” position.
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