Sonance DSP 2-750 MKIII Quickstart Guide

Box Contents

• Quickstart Guide
• Sonance DSP 2-750 MKIII Amplifier
• IEC Power Cord (Region Dependent)
• Amp Feet (4)
• Rack Ears (2)
• Block Connector for Voltage Trigger (1)

Getting Started

The Sonance DSP 2-750 MKIII is ready for immediate audio output. Sonance recommends the following installation sequence:

1. Place the amplifier in a location away from moisture and temperatures exceeding 100°F (38°C).
2. Connect audio inputs.
3. Connect speaker outputs.
4. Connect the amplifier to a network hub or switch using an Ethernet cable. For detailed network configuration, refer to the complete DSP 2-750 MKIII User's Manual and the SonARC guide.
5. For optional IR control, insert a mono 3.5mm plug (tip-positive) into the jack labeled "IR Control".
6. For Voltage Trigger control, connect trigger lines to the IN+ and IN- terminals on the Voltage Trigger terminal block.
7. Connect the power cord.
8. Confirm that audio inputs are muted. Turn the amplifier power switch to the ON position.

Source Connections

The DSP 2-750 MKIII is factory-equipped with a Hybrid Input Module. The Analog (Stereo RCA) input serves as the default source. If audio is detected on either of the digital inputs, the amplifier will automatically switch within ten seconds.

Figure 1: Source Connections. This diagram illustrates the available input options: Analog L/R (RCA), Coaxial, and Toslink. It emphasizes that only one input type should be used at a time. Output jacks are also depicted.

Voltage Trigger Control

The DSP 2-750 MKIII features a 3-30V (AC or DC) control input. The amplifier's default setting is "Always On" or "Audio-Sense". The Voltage Trigger functionality can be enabled within the SonARC interface.

IR Control

A 3.5mm jack is provided for receiving IR commands from a distribution box or self-powered IR sensor. The amplifier does not provide voltage to IR sensors. For specific IR control codes, consult the DSP 2-750 MKIII webpage. This feature is always active and does not require configuration in the SonARC interface.

Speaker Connections

The DSP 2-750 MKIII is capable of driving 4 ohm stereo, 8 ohm stereo, 8 ohm bridged mono, and 70 Volt loads. Configurations for bridged mono loads require selection within the SonARC interface.

NOTE: The DSP 2-750 MKIII ships in 70V mode.

1. Connect speaker wire (up to 12 AWG) to the provided block connector. IMPORTANT: Ensure all wire strands are kept inside the plastic shell. Damage may occur if speaker wires short together or touch the amplifier housing.
2. For bridged operation, connect speaker wires from LEFT+ to SPEAKER+ and RIGHT+ to SPEAKER-.
3. Plug the block connector into the amplifier and verify that there is no strain on the speaker wire.

Figure 2: Speaker Output. This diagram shows the speaker output block connector with terminals for LEFT+, SPEAKER+, RIGHT+, and SPEAKER-. It also includes a note regarding bridged operation: "BRIDGE 8 Ω MIN CLASS 2 WIRING".

Powering the Amplifier

Plug the provided 14-gauge EIA standard 120 Volt grounded power cable into the IEC power connector.

IMPORTANT: Do not plug the power cord into the wall outlet until all system connections are made.

Reset Button

Pressing the RESET button for a duration between three and ten seconds will reset the network settings to factory defaults (DHCP enabled). Pressing the RESET button for longer than ten seconds will perform a full factory reset, erasing any EQ changes or other user settings.

LED Status Indicators

Power Button System Status Indicator

• No Light: Amplifier is unpowered or the power button is turned off.
• Bright White: Amplifier has power and is active.
• Dim White: Amplifier has power and is sleeping.
• Blinking White: Amplifier is in overtemperature or power supply protection mode, or the "Identify Amplifier" button was pressed in SonARC.

Channel Status Indicators

• No Light: No audio present.
• Green: Audio is present.
• Blinking Red: Audio is present, but the amplifier is overdriven.
• Solid Red: Amplifier is in protection mode.

Panel Descriptions

Front Panel

Figure 3: DSP 2-750 MKIII Two-Channel Power Amplifier Front Panel. This image shows the front of the amplifier, highlighting the Illuminated Power Button (labeled 1) and the Active Audio and Protection Indicator (labeled 2).

1. Illuminated Power Button
2. Active Audio and Protection Indicator

Rear Panel

Figure 4: DSP 2-750 MKIII Two-Channel Power Amplifier Rear Panel. This image displays the rear panel of the amplifier, with numbered components indicating connection points: Audio Input/Output Module (3), Reset Button (4), Voltage Control (5), IR Control Input (6), IR Status (7), Speaker Output (8), RJ-45 Input (9), AC Fuse Holder (10), and AC Input (11).

1. Audio Input/Output Module
2. Reset Button
3. Voltage Control
4. IR Control Input
5. IR Status
6. Speaker Output
7. RJ-45 Input
8. AC Fuse Holder
9. AC Input