Audio Authority SF-16M 16-Channel Digital Matrix Amplifier
Installation Guide
Introduction
The SonaFlex™ SF-16M is a premium, multi-channel amplification system offering flexible input options, audio matrix switching, signal processing, and comprehensive control capabilities. Designed for commercial and residential distributed audio applications, this guide covers basic and advanced setup procedures.
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Key Features
- Input matrix switching, signal processing, and amplification in one unified system.
- 16 analog RCA inputs, plus two FlexPort™ inputs (two channels each) for a total of 20 mono (10 stereo) inputs.
- Optional Cat 5 FlexPort audio transmitters accept balanced line/mic, XLR, digital SPDIF, or analog RCA audio.
- 16 amplified outputs configurable as mono, stereo, or a combination.
- Up to four SF-16M units can be linked for a 64-output audio matrix.
- Class-D amplification: 50 watts per channel (all channels driven into 8 Ohms), stable at 4 Ohms.
- Linear power supply for warm, musical analog sound with responsive headroom.
- Signal processing includes high/low shelf filters, high/low pass filters, and parametric equalization per output.
- 10 preset sound scenes (system-wide snapshots) recallable via IR, RS-232, or IP commands.
- 10 output "groups" for synchronized control (volume, muting, source selection).
- Compatible with virtually any control system (IP, RS-232, IR), including Control4 SDDP.
- Front panel controls and VFD display for common settings; advanced setup via PC Setup Utility or IP/Serial commands.
- Power saving features: automute, turn off per output channel, system trigger input for standby control.
FlexPort Cat 5 Audio Inputs
Provides up to four additional audio inputs per SF-16M via optional FlexPort audio modules (FPM-U, FPM-D, FPM-X, FPM-B). Modules can be located up to 500 feet away.
- FPM-U: Stereo RCA
- FPM-D: Digital Coax/Optical Audio
- FPM-X: Mic/ 1/4" TRS Audio
- FPM-B: Balanced Audio
Each FlexPort input supports two channels of audio (stereo or dual mono) and includes RS-485 data pathway and 18V power for modules.
Control Interfaces
The SF-16M supports multiple control methods:
- IP: Via Ethernet connection.
- RS-232: Via DB-9 serial port for 2-way communication.
- IR: Via 3.5mm jack (rear panel) or front panel IR sensor.
- Contact Closures: Two inputs for audio overrides and sound scenes.
- Front Panel: Capacitive touch buttons and a multi-function knob with VFD display.
Front Panel Descriptions
The front panel features:
- A Power Light: Indicates power status.
- B IR Receiver: Receives IR commands.
- C Display (VFD): Vacuum fluorescent display for menus and status.
- D Control Knob: Navigates menus and adjusts settings.
- E Menu Button: Accesses the main menu.
- F Back Button: Returns to the previous screen.
- G Dim Button: Adjusts display brightness.
Back Panel Descriptions
The rear panel provides various connection points:
- H Audio Override Triggers 1 & 2: Contact closure inputs.
- I System Trigger In & Out: For power management (5V - 24V AC/DC).
- J Unit ID Switch: For multi-unit system configuration.
- K Ethernet Connector: With Link/Speed indicators.
- L USB Connector: For firmware updates and settings backup.
- M FlexPort Audio 1 & 2: Cat 5 inputs for FlexPort modules.
- N DB-25 Audio In/Loop Out: For linking units or connecting to other matrix systems.
- O RCA Stereo/Mono Audio Inputs: 16 inputs for audio sources.
- P 3.5 mm Main IR In/Loop Out: For IR control.
- Q DB-9 RS-232 In/Loop Out: For serial control.
- R Stereo and/or Mono Speaker Level Outputs: 16 outputs.
- S Power Switch: Main power toggle.
- T Fuse Compartment: For replacing fuses.
- U Power Cord Input: Standard AC power connection.
Before You Begin
Essential Steps:
- Choose a control method (front panel or third-party controller).
- Plan the system: list sources, define Zones, determine speaker requirements, and assign locations.
- Perform basic setup via the front panel: configure inputs/outputs, assign outputs to Zones, and name sources/Zones.
- Connect sources and speakers.
- Set up advanced features like Groups, Sound Scenes, and Overrides.
Rack Mounting: The SF-16M can be shelf-mounted or installed in a standard 19-inch equipment rack. Follow instructions for removing feet and using rack adapters.
Connections - Source Inputs
RCA Line Inputs: 16 inputs configurable as mono or stereo. Input configuration is done via the PC Setup Utility or front panel menu.
DB-25 Audio Connections: Used for linking SF-16M units or connecting to other Audio Authority matrix systems. The DB-25 loop output passes source inputs from the DB-25 or RCA inputs to the next chassis.
Speaker Outputs
The SF-16M provides 16 amplified speaker outputs. Factory default is mono, 50% volume, and muted. Outputs can be configured as mono or stereo.
Speakers and Impedance: Each output supports a 4 Ohm speaker load. Two 8 Ohm speakers can be connected in parallel per output. Avoid connecting multiple 6 Ohm or 4 Ohm speakers, or speakers wired in series.
Mono and Stereo: Outputs can be designated mono or stereo based on room acoustics and use. Mono is generally preferred for whole-house or commercial audio to simplify placement, while stereo is suitable for TV viewing or specific listening environments.
Third Party Control
The SF-16M integrates with third-party control systems via:
- Serial (RS-232): Recommended for full functionality and customization.
- Telnet (Ethernet): Reliable control with full functionality.
- IR: Offers most available functions for basic installations.
Detailed serial command lists and IR hex codes are available on the Audio Authority website.
Configuration and Setup
Front Panel Configuration: Basic setup and control are available via the front panel controls, including Zone Control, System Control, Source Setup, Zone Setup, and System Setup.
- Zone Control: Adjust volume, select sources, and manage loudness, bass, and treble for individual Zones.
- System Control: Manage Groups, Overrides, and Sound Scenes.
- Source Setup: Configure inputs as stereo or mono and adjust input gain.
- Zone Setup: Assign outputs to Zones and configure stereo/mono settings.
- System Setup: Adjust front panel settings, network status, update firmware, reboot, and perform factory resets.
PC Setup Utility: For advanced configuration, use the SF-16M Configurator software, available for download. This utility allows detailed control over DSP, scenes, overrides, and more.
FlexPort Module Details
Appendix A details the optional FlexPort modules (FPM-B, FPM-X, FPM-D, FPM-U) for expanding audio inputs. Rear panel connections and dipswitch settings for these modules are described, along with the FlexPort RJ-45 pinout.
FlexPort Module "Override" Button: Allows designated outputs to switch to a FlexPort input when the override button is pressed. This can be configured for momentary or toggle action.
Firmware Updates and Fuse Replacement
Firmware Update Procedure: Latest firmware can be downloaded from the Audio Authority website and installed via a USB drive inserted into the SF-16M's rear panel USB port.
Changing the Power Fuse: Instructions are provided for safely replacing the fuse, including identifying the correct fuse value and orientation for different voltage regions.
Serial and Ethernet Command List
Appendix D provides a comprehensive list of serial and Ethernet commands for controlling various functions of the SF-16M, including source selection, volume, mute, balance, tone control, EQ modes, overrides, and scene presets. These commands enable integration with automation systems.
Specifications
| Specification | Value |
|---|---|
| Power Per Channel (All Channels Driven) | 50W @ 8 Ohms |
| Frequency Response | 20Hz to 20kHz, +/- 0.55 dB into 8 Ohms |
| Full Power Bandwidth | 20Hz to 20kHz |
| S/N Ratio | 96dB |
| Channel Separation | 70dB (channel to channel @1kHz) |
| THD+N | <0.3% @ full power output |
| IMD | <0.5% @ full power output |
| Input Sensitivity | 0.5Vrms |
| Input Impedance | 20k Ohms |
| Audio Clock Frequency | 96KHz |
| Output Clock Frequency | 385KHz |
| Output Protection | Short Circuit, Over-Temperature, Overload |
| Line Voltage & Frequency | 100-120VAC 50-60Hz |
| Power Consumption | 1125W continuous, 1280W for 2 minutes |
| Maximum Current Draw | 10A RMS |
| Heat Output | 1109BTU/Hr. maximum |
| Dimensions (H x W x D) | 5.22" x 16.60" x 14" |
| Net Weight | 41 lb. |
| Shipping Weight | 49 lb. |
| Approvals | FCC, ETL |
| Warranty | Three years, parts and labor |
Limited Warranty
Audio Authority provides a three-year limited warranty covering defects in materials or workmanship from the original date of sale. Freight charges for warranty repairs are covered by Audio Authority (ground service only). Proof of purchase is required. Out-of-warranty repairs are available at a nominal charge. The warranty does not cover products damaged, altered, abused, misused, or improperly installed.
System Connection and Planning Worksheet
A worksheet is provided to assist in planning system connections, including source inputs, FlexPort inputs, speaker outputs, and Zone assignments. This tool helps ensure a smooth installation process.
Safety Warnings
WARNING: To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture. Use only with qualified personnel for installation. Do not open the cover, as there are no user-serviceable parts inside. Ensure adequate ventilation and avoid heat sources. Use the correct voltage and power cord. Unplug during lightning storms or long periods of disuse. Refer all servicing to qualified personnel.
CAUTION: RISK OF ELECTRIC SHOCK.
French warnings are also provided for safety compliance.
