40 Years
 About UsSupportContact Us
Faith and Values  
  Interactive Merchandising
& Display Projects
Audio & Video
Demonstration Tools
Intercoms for Drive-up
Customer Service
General Aviation
Ground Power

   Audio & Video for
   Custom Installations

[Image for FPM-B]
FPM-B (Decora trim cover not included)
FlexPort Audio Transmitter Balanced Line Mic via Cat 5
Model FPM-B - Now Shipping

[Buy Online]
$159.00 USD
  • Four wire connection for push-to-talk mic
  • Range up to 500 feet from SF-16M
  • Cat 5/6/7 cable
  • Daisy chain option
  • Illuminated override button
  • White, black, ivory, almond inserts included

Categories: Amplifier, Distributed Audio, Audio Matrix, Cat 5 Transmitter

Log in to see dealer pricing

[Rear view]
Rear view
[Color inserts]
Color inserts


Ideal for push-to-talk microphones, FlexPort™ Audio Input Transmitters serve as remote input modules for SonaFlex™ SF-16M Matrix Amplifiers. FPM-B accepts three- or four-wire microphone or mixer outputs for the SonaFlex system via Cat 5. FlexPort transmitters are available in several different styles, including balanced line XLR, digital SPDIF and analog RCA audio signals. Audio signals are transmitted to an SF-16M via Cat 5e/6/7 cable up to 500 feet and made available to specified amplified outputs, and can be shared with up to three additional SF-16M amplifiers. Each transmitter has a convenient override button, and the FPM-B includes an optional connection for override via microphone push-to-talk switch. Removable, four-wire termination plug.

Restaurant application with SF-16M and FlexPort


Key Features
  • Provides convenient remote input point for pro-audio sources such as mixers and paging microphones
  • Convenient Override switch provides a simple user interface at the transmitter location
  • Override connection mimics override switch functionality for push-to-talk microphones
  • Differential balanced line technology eliminates interference, enabling FlexPort transmitters to be located up to 500 feet away from the SF-16M without signal degradation
  • Up to four FlexPort transmitters may be used with one SF-16M
  • Simple connection via one Cat 5/6/7 cable; daisy chain two FlexPort transmitters on each SF-16M input

About the SonaFlex SF-16M

The SF-16M digital matrix amplifier is a unique blend of multi-channel amplification, flexible input options, audio matrix switching, signal processing and open control capability.  Designed and assembled in the U.S. with sound and video integrators in mind, the SF-16M offers a new approach to commercial and residential distributed audio applications - one multi-purpose matrix amplifier that can be used in a variety of installations.
  • Input 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 matrixed inputs
  • 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
  • Linear power supply delivers the warmth and musicality of an analog amplifier, combined with the responsiveness and headroom required for dynamic music content
  • DSP tools include hi- and low-shelf filters, hi- and low-pass filters, and up to seven bands of parametric equalization per output
  • 10 audio overrides (triggered by contact closure, IR, or RS-232, commands) provide a convenient method to switch to alternate audio inputs for appplications 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- NEW Control4 Driver v.2.0.2 for SF-16M Control4 Driver v.2.0.2 for SF-16M (63.91 KiB)

Compatible FlexPort Cat 5 Audio Transmitters

    • FPM-U accepts one stereo audio source or two mono sources for transmission to the SF-16M
    • FPM-X accepts mic or line audio, via XLR or 1/4  inch jack, from microphone or mixer outputs
    • FPM-D accepts one digital audio source, converting it to analog for transmission to the SF-16 (plus RCA for local analog output)


    S/N Ratio:96dB
    Channel Separation:70dB(channel to channel @1kHz)
    Input Sensitivity: 0.5Vrms
    Input Z Impedance:FPM-U: 20k Ohms, FPM-D: 75 Ohms, FPM-X and FPM-B: 2k Ohms
    Accepted Bit Rates (FPM-D)44.1, 48, or 96KHz 
    Dimensions (H x W x D):4 x 1.65 x 3.65 including mounting tabs; 2.8 x 1.65 x 3.65 without tabs (inches)
    Net Weight:9.5 oz. (270g)
    Shipping Weight:12 oz. (340g)
    Warranty:Two years, parts and labor

    Frequently Asked Questions

    Q: Can I use the Override button on the FPM-B as a push-to-talk button?
    A: Yes. The override connection on the four-wire terminal is idential in function to the Override button on the FlexPort transmitter.

    Q: Can I use a serial or telnet command to override a FlexPort input?
    Yes, but make sure the FlexPort module's override type is set to "TOGGLE." If it is set to "MOMENTARY" the override will be instantly shut off by the FlexPort module.

    Q: Can I use FlexPort inputs from one SF-16M on a second SF-16M?
    Yes, FlexPort inputs in an expanded SonaFlex system may either be used separately, or across SF-16M units. The FlexPort output bus jacks must be manually linked to connect from one chassis to the next, so multiple configurations are possible.


    Our Custom Integration Product Guide - High Resolution Custom Integration Product Guide - High Resolution [View] (9.80 MiB) contains many applications for SonaFlex.
    See the custom integration Applications page for FlexPort examples.


    About UsSupportContact UsWebsite FeedbackEmploymentPrivacy
    Audio Authority® Corporation, 2048 Mercer Road, Lexington, KY 40511-1071 USA
    Toll Free USA and Canada: 800-322-8346 Phone: 859-233-4599 | Hours: M-F 8:30am to 5:00pm EDT
    Copyright ©1996-2019 . All rights reserved. Proprietary content. May not be used without prior authorization.
     Toll-free US and Canada 800-322-8346