Sonance 875D SE Auto-On, AUTO Audio Trigger Mode, VOLTAGE Trigger Mode, Adjustments

SONAMP® 875D SE 8-CHANNEL AMPLIFIER

Auto-On

You can set your 875D SE so that any zone will automatically turn ON when it receives an audio signal, or when it receives a control voltage from an external source (such as a Sonance Navigator Harbor multi-zone controller). Each zone has two Trigger Mode switches located on the rear panel: Auto — zone is turned ON when an audio signal is present, and Volt — zone is turned ON by an external control voltage (see Figure 14).

NOTE: Setting both switches ON puts that zone in the Serial control mode, disabling the Auto On feature . (See Serial Control, on page 14 . )

AUTO (Audio) Trigger Mode

TRIGGER MODE
CH 1/2	AUTO	RS-232
	VOLT	RS-232
CH 3/4	AUTO
	VOLT
CH 5/6	AUTO
	VOLT	RS-232
CH 7/8	AUTO
	VOLT	RS-232

OFF ON

Figure 14:

Auto-On Trigger Switches

When a zone’s AUTO switch is set to the ON position, any audio signal arriving at the zone’s active input connectors (as determined by the INPUT ASSIGNMENT DIP SWITCHES, see page 8) will activate the zone for operation. The sensitivity of the zone’s AUTO-ONcircuit can be increased or decreased by adjusting the AUTO ON level control on the front panel (see Figure 15).

•Turning the control clockwise increases the sensitivity (less voltage is required to trigger the AUTO-ONfunction).

•Turning the control counter-clockwise decreases the sensitivity (more voltage is required to trigger the AUTO-ONfunction).

The AUTO-ONtrigger sensitivity ranges from 5mV/ch in the full clockwise position to OFF (AUTO- ON will not trigger) in the full counter-clockwise position.

	3 – 4		5 – 6
L	R	L	R
	AUTO ON

Figure 15:

Zone AUTO ON (Audio)

Trigger Sensitivity

Adjustments

In the AUTO-ONmode the zone will remain ON for approximately 3 minutes after the audio signal has ceased. This provides ample time to prevent erratic operation from pauses between musical passages or while changing sources.

VOLTAGE Trigger Mode

When a zone’s VOLT switch is set to the ON position it can be automatically turned ON by an external trigger voltage that appears at the zone’s EXTERNAL TRIGGER INPUT connections (see Figure 16).

• The trigger voltage must be between 5V and 24V, either AC or DC.

The 875D SE has individual EXTERNAL TRIGGER INPUT connections for each zone, and an additional EXTERNAL TRIGGER INPUT connection (labeled ALL) that will turn all 4 zones ON from a single voltage trigger.

ALL 1/2 3/4	5/6	7/8 CH	CH
+ – + – + –	+ –	+ –	CH

EXTERNAL TRIGGER INPUTS 5 – 24V AC–DC

Figure 16:

External Trigger Input

Connections

The EXTERNAL TRIGGER connectors feature flip-up levers similar to the ones used on the speaker connectors:

1.Open the levers for the zone’s EXTERNAL TRIGGER inputs.

2.Insert the control wires into the appropriate openings in the connector.

3.Close the levers.

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