MediaLinQ™ cable to assure optimum sound reproduction. Small gauge or inferior quality wire will degrade imaging, diminish bass reproduction, and add a generally congested quality to music. Always check local building codes before installing wire in walls or ceilings.

Wires may be terminated with banana plugs for convenience if connections will be changed frequently. Any connector should be gold plated to prevent oxidation, which degrades sound quality. The binding posts on the Sonamp® 1230 also accept twisted bare wire ends through the 45º opening in their center shafts. Do not overtighten shafts. Tinning the bare copper wire is recommended. As an option, use contact enhancer on mating surfaces of connections to retard oxidation and enhance signal flow. Do not strip more than 1/2”of the jacket from speaker wires.

Always provide sufficient slack in wires to avoid tension or accidental disconnection. Always contain any excess wire to prevent tripping hazards.

Source Connection

Always use quality high fidelity interconnect cables such as Sonance Silver MediaLinQ OFC Interconnects. If source components are more than 20 feet from the amplifier, use the LS1 and LR1 balanced line-level sender and receiver to avoid signal degradation (As shown in Figure 6).

Plug source components (receiver, preamp, page signal) to the LINE IN bus inputs at the top center of the amplifier.

Plug dedicated sources (zone output, page signal, video game, or electronic doorbell) into the DIR (direct) channel inputs if desired.

Plug downstream amplifiers to the non-buffered LINE OUT bus outputs at the bottom center of the amplifier.

Source Settings

The fourplex DIP switches of the Sonamp® 1230 provides the most flexible configuration options of any multichannel ampli- fier. Settings are changed by moving the switches from (ON) to (OFF):

L

Assign to master left channel source

RAssign to master right channel source

L + R Mono reproduction of source

AUX

Assign to AUX channel source

DIR

Select dedicated channel input.

Note: It is possible to assign one or all switches as needed (L+R+AUX, where AUX is the page input for a hallway or waiting room with paging.

Volume Control

The individual channel volume controls are useful to balance the desired sound levels for various zones, to balance output from right and left channels to compensate for room characteristics such as size and ceiling height.Also,by reducing the Sonamp volume control settings, you compel the source preamp or receiver volume control to operate in the middle of its range. do not set the level controls higher than the maximum level desired. Place tape over the VC hole to prevent tampering.

Power Trigger Controls

The Sonamp® 1230 may be automatically activated by an input signal, low voltage trigger, or manual pushbutton. It also provides a 12 volt DC output to trigger other components.

Auto-On Control

To use the Auto-On feature, turn the main power switch ON and slide the TRIGGER switch on the rear panel to the UP position. Use the SENSITIVITY control to set the minimum signal level that will activate the amplifier. In this mode, the amplifier will automatically turn off after 8 minutes of no input signal at any of the 12 channel inputs. The Auto-On mode disables the other two triggering modes.

Voltage Control

When the TRIGGER switch is set to EXTERNAL VOLTAGE (the center position) and the main power switch (on the front panel) is set to ON, the amplifier will be activated by the presence of AC or DC voltage, from 5 to 24 volts, at the INPUT connector. The EXTERNAL VOLTAGE mode disables the other two triggering modes. (DO NOT CONNECT TO 120VAC LINE VOLTAGE)

Bypass

If the TRIGGER switch is set to BYPASS (the bottom position) and the main power switch (on the front panel) is set to ON, the amplifier will always be active. The BYPASS mode disables the other two triggering modes.

Ground lift

The GROUND LIFT switch breaks ground loops that can occur between source equipment and amplifiers. Set the GROUND LIFT switch to OFF for most applications. When the Sonamp 1230 is to be used in an equipment rack, set the GROUND LIFT switch in the ON position. This will isolate the audio circuitry from the chassis. Thus, the chassis need not be isolated from the equipment rack with insulator washers.

Status LEDs

AC ON LED – This red LED indicates that the AC power line cord is plugged into a live AC outlet. If the main AC line fuse opens, this LED goes out. The main power switch setting does not impact this LED.

ACTIVE LED – This green LED indicates that the amplifier has been activated via one of the three methods described previously.

PROTECTION LEDs – These amber LED’s light during a fault condition, one LED for each pair of channels. If one of the Sonamp 1230’s protection circuits is triggered, the LED will turn on. If a channel pair encounters a short-circuit event or an extremely low impedance, the respective LEDs will light (1&2, 3&4, 5&6, 7&8, 9&10, 11&12). All other channel pairs are unaf- fected. If the heat sink temperature is exceeded because of poor air circulation or high ambient temperature, a cutoff switch attached to left and right channels will activate. Each bank (1&2, 3&4, 5&6 or 7&8, 9&10, 11&12)of a Protect LEDs will then light to signify a fault. If amplifiers are in Bridged mode, the Protection Circuitry will sense a short circuit across both positive speaker terminals and also positive to negative speaker terminal.

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