Sonance 875D SE Protection Circuits, Thermal Protection, Over-Current Protection

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SONAMP® 875D SE 8-CHANNEL AMPLIFIER

Protection Circuits

Thermal Protection

If the amplifier’s cooling vents are blocked, or it is installed with inadequate ventilation the amplifier may exceed its safe operating temperature. If the amplifier’s internal temperature exceeds 154°F (68°C) it will self-protect, and the following will occur:

•The audio output to all connected zones will shut OFF.

•The front-panel PROTECTION LEDs (see Figure 3) will illuminate yellow.

•An over-temp message will be sent via RS-232.

Once a safe temperature (<67°C) is reached, the Protection LEDs will all extinguish. You can then re-activate the amplifier, either by switching the front-panel Power button OFF and ON or by a ‘Power’ command if the amplifier is being serial controlled.

IMPORTANT: Before re-activating the amplifier, correct the problem that caused the over-temperature condition (volume set too high, inadequate ventilation, etc.)

PROTECTION

BBE ON

ACTIVE

Figure 3:

FRONT-PANEL

STATUS LEDs

NOTE: If you’re serial-controlling the 875D SE you can poll the amplifier at any time and its internal temperature will be reported to the control device .

Over-Current Protection

If an over-current condition occurs in a zone, that zone will shut OFF for 5 seconds and its PROTECTION LEDs will flash ON and OFF. The zone will then turn back ON. If the over-current condition continues the zone will shut OFF for 6 seconds, its PROTECTION LEDs will flash, then it will turn back ON. If the over-current condition continues this process will repeat, with the wait time increasing by 1 second each time. When the wait time reaches 10 seconds the zone will LOCK, the zone’s PROTECTION LEDs will continually illuminate and the amplifier must be powered OFF using the front-panel POWER button (or a serial command, if the amp is being controlled via RS-232). Before turning the amplifier ON again, correct whatever is causing the over - current condition in t he zone (speaker impedance too low, volume too high, short - circuit, etc . ) .

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Contents Sonamp 875D SE Page Ance to Rain or MOISTURE. Important Safety InformationIntroduction Design and FeaturesFront Panel Placement Box ContentsUnpacking Thermal Protection Protection CircuitsOver-Current Protection Power Cord see Figure Powering the AmplifierReplacing the Fuse see Figure Source Connections see Figures 6 Input Assignment DIP Switches see FigureSpeaker Connections for Stereo Operation see Figure Input Sensitivity AdjustmentUse Good Speaker Wire Speaker ConnectionsFlip Outer 2 Levers UP Speaker Connections for Bridged Operation see Figures 11Voltage Trigger Mode Auto Audio Trigger ModeAuto-On BBE Sound Enhancement OFF Bypass ModeEnabling 875D SE Zone Serial Control Connecting the 875D SE to a Serial Control DeviceZone Trigger Outputs Serial Control875D SE Serial Commands Serial Control Notes Installation Examples SpecificationsZone Processor System 2 7.1-Channel Home Theater SystemFor ALL Channels System 3 Multi-Zone System with ControllerFor ALL AL2 Control Output K2 Rear Panel Important Freight collect shipments will be refused Technical Assistance and ServiceExclusions and Limitations Limited Warranty Coverage U.S.A. OnlySystem Notes
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875D SE specifications

The Sonance 875D SE represents a pinnacle in high-performance audio solutions, catering specifically to discerning audiophiles and professional installers alike. This powerful amplifier combines cutting-edge technology with superior engineering, providing an exceptional listening experience that resonates with clarity and precision.

One of the standout features of the 875D SE is its Class D amplification, which delivers high efficiency without compromising on sound quality. This amplifier is designed to provide a robust output, allowing it to drive a wide array of speaker configurations with ease. With its ability to produce up to 75 watts per channel into 8 ohms, users can enjoy rich, dynamic sound in various settings, from residential to commercial environments.

The 875D SE is equipped with advanced digital signal processing (DSP), offering users a comprehensive array of tuning capabilities. This technology ensures optimal audio performance by enabling precise adjustments for room acoustics, allowing users to customize their listening experience. The integrated DSP also features a 30-band equalizer and multiple crossover settings, enhancing system flexibility and ensuring compatibility with a variety of speaker setups.

Another key characteristic of the 875D SE is its multi-zone functionality, which allows users to distribute audio across multiple rooms or spaces. With support for up to four independent zones, each zone can be controlled separately, delivering exceptional convenience in whole-home audio solutions. This is complemented by the amplifier’s intuitive interface and compatibility with various control protocols, making integration into existing systems seamless.

The build quality of the 875D SE reflects Sonance's commitment to durability and reliability. Encased in a robust chassis, the amplifier is designed to withstand the rigors of installation and everyday use. Additionally, its sleek design ensures it can be placed in any environment without detracting from the overall aesthetic.

Connectivity is another strong suit of the 875D SE, featuring multiple inputs, including balanced XLR and unbalanced RCA options. This versatility allows for simple integration with various audio sources while ensuring minimal signal interference. Furthermore, the amplification system is designed for easy installation, with user-friendly features that simplify the setup process.

In summary, the Sonance 875D SE is a formidable audio amplifier that delivers exceptional performance, versatility, and ease of use. With its advanced features, superior sound quality, and robust design, it stands out as a leading choice for both audiophiles and professional applications, ensuring immersive sound experiences across diverse environments.
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