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Audio Authority SonaFlex Digital Amplifier

SF-16M 50 Watts x 16 Channel Matrix Zone Amplifier
Now With Android and iOS Mobile Control Apps!

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Audio Authority SonaFlex SF-16M  50 Watts x 16 Channel Digital Zone Amplifier

Audio Authority SonaFlex SF-16M 50 Watts x 16 Channel Digital Zone Amplifier

The Audio Authority's SonaFlex
SF-16M is a 16-Channel matrix zone amplifier with sophisticated digital control capabilities, joining the elite range of Audio Authority products that are designed and built in the USA.

Built from the ground up, the SF-16M is the perfect companion to Audio Authority's own ADX and HLX audio matrix switchers, as well as a wide range of stand-alone applications.  For example, use with an ADX-0808 Multi-Zone Audio Switcher and up to eight audio sources to create a sophisticated whole-house audio system.  Combine multiple SF-16M amplifiers for use in restaurants and clubs, complete with overhead paging and live band integration.  Use built-in room-combining features to handle partitioned conference halls.

When the music matters, the custom-designed linear hybrid power features toroidal power transformers, giving the SF-16M transient handling capabilities that switching power supplies simply cannot match.  This amplifier has the power and agility that is crucial to preserving musicality and  warmth that one would expect from a fine analog amplifier while simultaneously brining the advantages of superior responsiveness, headroom, and dynamic range.  It is, in effect, a re-imagining of what an audiophile-quality amplifier should be.

  • 16-Channel Amplification and matrix switching
  • Digital Signal Processing for each output
  • 16 mono or 8 stereo line level inputs via RCA connectors
  • 4 mono or 2 stereo FlexPort inputs
  • 16 speaker-level outputs via "Phoenix" connectors
  • Cascade multiple SF-16M amplifiers to expand to as many as 64 channels
  • Rack-mountable with included 3U rack ears
  • Multiple control options
    • Free iOS and Android Mobile Control Apps
    • CasaTunes, Control4, RTI, and other third-party RS-232 controllers
    • Front-Panel Controls

When the Music Matters

Why not make every room a listening room?  It's a beautiful concept, but the reality is that many of today's multi-channel digital amps are lacking in terms of the musicality and power that is needed to do justice to a music lover's collection.

When setting out to to develop the SonaFlex Series, Audio Authority's guiding principle was that multi-room audio equipment should be just as respectable as audiophile products of the classic listening era.  The fruit of their labor is multi-channel digital amplifier with the musicality and warmth of a fine analog amp.  The SF-16 is responsive and powerful, with the headroom and dynamics your favorite tunes deserve.

How Audio Authority Did It

A  linear power supply, based on a uniquely designed rectifier circuit with toroidal transformers is at the core of the SonaFlex amplifier. Audio Authority's design uses custom-built transformers to meet the power demands associated with transient peaks, resulting in an "ease" to its nature.

Class D amps with switching power supplies which are efficient, but they can't handle large transient peaks. SonaFlex's hybrid linear supply is also very efficient, but it also responds to musical dynamics with the agility, power and  headroom that defines a truly musical amplifier.

More Magic in the Details

On the digital side, high sampling rates contribute to smoother, more natural sound reproduction, adding finesse to power.   Following through on Audio Authority's commitment to the music, all of the SonaFlex components were carefully chosen to keep harmonic distortion low and the signal to noise ratio high,.

Features like remote source wall plates, expandability, and quick install connectors, demonstrate Audio Authority's commitment to the people who install their equipment, elevating SonaFlex to a whole new level compared to other multi-channel amps.  The bottom line is that SonaFlex exists to thrill music lovers … because the music matters.

The Audio Authority SF-16M comes with an exceptional 3 year parts and labor warranty from the manufacturer.

Audio Authority's Description

16 Channel Matrix Amplifier with FlexPort Inputs

Model SF-16M Sixteen Channel Digital Amplifier


Whether you install audio systems in commercial facilities or in homes, the SF-16M has the features and capabilities to handle just about any application you may encounter. Its flexibility and musical power give end users so much more than traditional audio systems, while giving installers a streamlined installation process.

The SonaFlex SF-16 is a unique blend of multi-channel amplification, flexible audio switching and open control capability. Built and designed in the U.S. with the custom installer in mind, the SF-16 brings a new approach to common residential and commercial distributed audio applications - one multi-purpose matrix amplifier that can be used in a variety of installations.

Commercial Solutions

Restaurants, sports bars, hotels, conference rooms and worship facilities are all great installation opportunities for the SF-16M. Using FlexPort inputs, override triggers and sound scenes, the SF‑16M is great solution for facility-wide paging, conference room combining/segmenting, live audio override for restaurants, nightclubs and more.

Key Benefits for the End User

Local Source Selection
Popular consumer audio sources such as iPods, AppleTVs and BluRay players can be located near the listener and connected via Cat 5 to the FlexPort audio inputs. With the push of a button, the user switches to the local audio source and then switches back to the default audio at will. This feature is also ideal for restaurants and clubs with live music where a user needs to override background music with audio from a mixer.

Sound Scenes
A Sound Scene is a system-wide snap-shot of all volume and source settings. Scenes allow the end-user to easily recall previously captured system settings. It is a perfect way to set the mood for parties, restaurant ambience and other commonly used system settings that need to be recalled with a single button press. Up to 10 Sound Scenes can be stored and recalled per SF-16M. For installations with multiple SF-16M’s linked together, additional system-wide Sound Scenes can be stored and recalled across all units.

Output Grouping
Allows multiple outputs to be grouped together to share volume ramping, muting, source selection and more. Groups are ideal for making large areas a single audio zone or for grouping outputs with hi-pass and low-pass filters (sub/sat combinations) so that they respond together as one zone. Up to 10 groups can be stored per SF-16M.


Key Features

  • Audio matrix switching, signal processing and amplification in one unified system
  • 16 analog RCA inputs combined with four Cat 5 FlexPort input channels allow for a total 20 mono/10 stereo inputs
  • Optional Cat 5 FlexPort modules accept balanced line/mic, XLR, digital coax/optical and analog RCA audio sources
  • 16 amplified outputs can be configured as mono, stereo, or a combination of stereo and mono
  • Up to four SF-16M units can be linked together to form a powerful 16 input x 64 output audio matrix, plus FlexPort inputs
  • Class-D amplification provides a conservatively rated 45 watts per channel (all channels driven) or 60 watts (8 channels driven)
  • Linear power supply delivers the warmth and musicality of an analog amplifier, combined with the responsiveness and headroom required for dynamic music content
  • Signal processing tools include hi- and low-shelf filters (Bass/Treble), hi- and low-pass filters, and up to seven bands of parametric equalization per output
  • 10 audio overrides (triggered by contact closure, IR, and RS-232, commands) provide a convenient method to switch to alternate audio inputs for applications such as paging, local source selection, and room combining
  • 10 preset sound scenes (a system-wide snap-shot of all volume and source settings) can be saved and recalled using IR, RS-232 or IP commands
  • 10 audio groups allow multiple outputs to be grouped to share volume ramping, muting, and source selection
  • Compatible with virtually any control system available using RS-232, Ethernet or IR commands
  • Easy setup via PC configuration utility

FlexPort Cat5 Audio Inputs

  • FPM-U accepts two RCA inputs, either one stereo or two mono sources
  • FPM-D accepts one digital audio source, converting it to analog for transmission to the SF-16 (local analog output also available)
  • FPM-X accepts mic audio, either 1/4-inch jack or XLR, from microphone or mixer outputs
  • FPM-B accepts balanced audio from mixers or microphones, includes remote override connection for push to talk microphones

Control Interfaces

  • Ethernet
  • RS-232 Serial
  • Front panel IR sensor
  • Rear panel IR input (3.5 mm jack)
  • Front panel capacitive touch buttons and knob with LCD screen

The SF-16M PC Configuration Utility is an easy way to set up source and output names, audio settings, groups, sound scenes, override actions, and all other features of the SF-16M.

Flexible Input Options
Most pro and consumer audio sources can be used with the SF-16M via its unique FlexPort™ audio inputs. Up to four FlexPort audio modules can be connected, via Cat-5, to each SF-16M. Module options include balanced line/mic, XLR, digital coax/optical, and analog RCA inputs, accommodating anything from pro audio mixers to Apple TV media players. FlexPort modules include an illuminated button that may be used to trigger audio override at all pre-selected SF-16M outputs.

Scalable Outputs
Any amplified output of the SF-16M can be assigned as mono or stereo, allowing for 16 mono, 8 stereo, or a mixture of both mono and stereo speaker locations per chassis. The SF-16M can split mono inputs to stereo outputs and combine stereo inputs to mono outputs. Up to four SF-16M units can be linked together to form a powerful 32 input x 64 output system, with shared source signals and optionally shared FlexPort signals.

Pure, Stable and Reliable Power
Using Class-D digital amplification, the SF-16M produces a conservatively rated 45 watts per channel (all channels driven) or 60 watts (8 channels driven) at 8 Ohms and is stable to 2 Ohms. The SF-16M is so rock-solid that even a dead short to the outputs won’t negatively affect the unit. The SF-16M shuts off the amplifier stage until the short is corrected and then comes back on without a power cycle.

Innovative Linear Power Supply
Quite possibly the most impressive benefit of the SF-16M is its dynamic audio quality. Competing Class-D products use switching power supplies, which are efficient, but have a serious flaw: they can’t manage large transient peaks, resulting in audio distortion. The SF-16M hybrid linear supply has the headroom to respond to musical dynamics with extra power, because its analog design allows its floating voltage rail to accommodate quick transient peaks in the music, instead of clipping, like the switching supply does.

Quality Front-End Components
The SF-16M features 24-Bit, 96-kHz Burr-Brown A/D conversion with 64-times oversampling, resulting in natural, accurate sound reproduction of the input source material.

Signal Processing Tools
The SF-16M provides a rich palette of Digital Signal Processing (DSP) tools that allow the installer to custom-tune every sonic environment. For basic installations, use DSP such as bass, treble, balance and loudness. For more advanced home or commercial applications, use hi/low pass filters and up to 7-bands of parametric equalization per output.

Pass-Thru Mode
When you need a great sounding amp to use with an existing audio matrix, the SF-16M excels, providing 16 RCA inputs and DB-25 source audio loop outputs for system expansion. In addition, the SF-16M’s DB-25 input allows for quick connection to Audio Authority audio matrix switchers such as HLX and ADX. The built-in FlexPort audio inputs can still be used in pass-thru mode to override any on-board RCA audio input, allowing for features such as local source selection, paging override, doorbell override, and room combining.

Open Control Architecture
The SF-16M is compatible with virtually any control system available today using RS-232, Ethernet or IR commands. 2-way drivers for many of the top control systems are available for download from our website. In addition, iPad control of the SF‑16M is available by downloading control templates based on the Command Fusion control platform.*

Easy Setup
Advanced setup tasks (input/output naming, group assignments, sound scene setup) are achieved using the SF-16M's PC configuration software.  The SF-16M's front panel VFD display allows for access to basic settings required in a typical install. For added security, the front panel can be locked out, preventing tampering of system settings.



Power Per Channel (All Channels Driven): 45W @ 8 Ohms
Frequency Response: 20Hz to 20kHz, +/- 0.55dB
Full Power Bandwidth: 20Hz to 20kHz
S/N Ratio: 96dB
Channel Separation: 70dB ( channel to channel @1kHz)
Total Harmonic Distortion (THD+N): 0.03% at full power
Intermodulation Distortion (IMD): 0.05% at full power
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 without rack ears and feet (H x W x D): 3U, 5.22” x 16.60” x 14”
Net Weight: 41 lb.
Shipping Weight: 49 lb.
Approvals FCC, ETL
Warranty: Three years, parts and labor




  • SF-16M Firmware Version 1.2.0  [Zip file]
    • Reinforced serial command operation when multiple SF-16M units are connected together.
    • Modified manufacturing test commands.
    • Factory default settings now mute all outputs to prevent surprising high volume on startup.
    • Improved Save command operation.
    • Front panel display remains on the current screen during reboot, load or unlock, but switches to the main menu after a front panel lock request.

IR Codes



PC Software

Audio Authority SonaFlex SF-16M  50 Watts x 16 Channel Digital Zone Amplifier, back panel

This is the back panel of the SF-16M.

Android and iOS Contol Apps

Android and iOS Control Apps, free in the Google Play and Apple's App Store.

Audio Authority FlexPort Module Options

Shown here are the optional companion  FlexPort Module options.

Audio Authority SonaFlex Signal Flow

Audio Authority SonaFlex Signal Flow Example

Audio Authority SonaFlex SF-16M - Mobile App Guild

Android and iOS mobile control apps guide.  PDF.

Audio Authority SonaFlex SF-16M Focus Sheet - click to download PDF

Audio Authority SonaFlex Series focus sheet - click to download in PDF format.

Audio Authority SF-16M / ADX Focus Sheet - click to download PDF

Audio Authority SF16M / ADX Integration focus sheet - click to download PDF.

Audio Authority SonaFlex SF-16M Manual - click to download PDF

Audio Authority SonaFlex Series Manual - click to download in PDF format.

Purchase Information
Product Description SKU MSRP Your Price Quantity
SonaFlex 60 Watts x 16 Channel Digital Matrix Zone Amplifier SF-16M $2495.00 $2245.50
FlexPort XLR/ 1/4” TRS Input with Phantom Power FPM-X $159.00 $143.10
FlexPort Balanced Line/Mic Input with Phantom Power FPM-B $159.00 $143.10 
FlexPort Analog Audio Input FPM-U $139.00 $125.10 
FlexPort Digital Coax/Optical Input FPM-D $169.00  $152.10
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Why Cable Solutions?

American Innovation and American workmanship are intrinsic in the Audio Authority name.  Add customer-centric service from Cable Solutions and you get a superior experience.  Don't get stuck with incorrect advice, bad service, slow shipping or inferior products. If you want the best, you need look no further.