5
Amplifiers & Preamplifiers
ZPR68-10
ume level will ramp continuously. When a zone is turned OFF, then ON again, or if power is interrupted,
the volume will return to its last setting.
6. MUTE ON / OFF buttons. Separate On / Off buttons give positive mute commands without knowing
what the status is. This is very helpful in a remote room when all adjustments are made “blind” without
any visual aids for status.
NOTE: Mute is released (audio on) when a VOLUME, INPUT, BALANCE, BASS or TREBLE
command is sent, in addition to MUTE OFF.
7. TRIM button. Activates the Input Level Trim mode. This allows level trimming of each input on the
ZPR68-10 so that all sources will sound equally loud when switching from one source to another (see
ADJUSTING INPUT LEVEL TRIM procedure). The TRIM mode will turn off automatically 10 seconds
after the last button is pressed, or, it can be instantly defeated by pressing the ADJ-OFF button.
8. MAX-V button. Saves the maximum desired volume level for the zone when in the Z-ADJ mode (see
ZONE ADJUSTMENTS procedure).
9. BALANCE buttons. When the BALANCE "arrow" buttons are pressed, the audio output will move to
the left or right in 2 dB steps with each left or right press. (NOTE: No change will occur if they are held
down continuously).
10. Balance "Center" button. This button, when pressed (identified by a "—" mark), will instantly return
the balance to the center position from any previous setting.
11. OFF button. Turns the zone OFF. The ZPR68-10, however, remains in "Standby" mode, ready for
zone turn-ON when any INPUT button is pressed.
12. LAST button. Returns to the last adjusted values when comparing customized tone and balance
settings to electrical flat (E-FLAT). Refer to ZONE ADJUSTMENTS procedure.
13. E-FLAT button. Switches the tone settings to electrical flat (flat frequency response) and the balance
to center from customized settings. In conjunction with the LAST button, it allows instant audible
comparisons during setup procedures. Refer to ZONE ADJUSTMENTS procedure.
14. TREBLE & BASS control buttons. When the "arrow" buttons are pressed, the treble and bass
response can be increased or decreased from 0 dB to
±
12 dB in 2 dB steps with each up or down press.
(NOTE: No change will occur if they are held down continuously).
Use these controls to "EQ" (equalize) the sound for each zone's acoustic differences during the "Z-
ADJ" settings. The values arrived at become the "N-Flat" values ("EQ'd" values) for the user.
15. Treble & Bass "N-Flat" buttons. These buttons, when pressed (identified by a "—" mark), will
instantly return the treble and bass to the "N-Flat" values (nominal or EQ'd" values) from any previous
settings the user may have used.
16. Z-ADJ button. Activates the ZONE ADJUSTMENTS mode, allowing customized bass, treble, balance
and max. level settings for each individual zone. Z-ADJ will turn off automatically 10 seconds after the
last button press, or, it can be instantly defeated by pressing the ADJ-OFF button. Refer to ZONE
ADJUSTMENTS procedure.
17. Code Group Numbers. Each button face on the RC68+ is marked with a Code Group Number
identifying a total of 55 different IR Remote Control Code Groups.
These code groups allow Xantech products that use RC68+ codes, to have a different code group
assigned to each one. This prevents mutual interaction when both are used on the same IR bus in an
IR system. This also permits the installer to change the code group in the field if two or more of the same
Xantech model are used on the same IR bus.
Refer to the INSTALLER INSTRUCTIONS that come with the RC68+ for Code Group Setting
Procedures.
