Adcom GTP-600 User Manual

Page 14

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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;

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

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.