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FlexRadio SDR Radios & Transceivers
A true pioneer in software-defined radio (SDR) technology, FlexRadio Systems revolutionized amateur radio by introducing the first SDR transceiver that could be upgraded...
A true pioneer in software-defined radio (SDR) technology, FlexRadio Systems revolutionized amateur radio by introducing the first SDR transceiver that could be upgraded with simple software downloads—no new hardware required. Since unveiling its groundbreaking SDR-1000 transceiver and PowerSDR platform in 2003, the company has continued to push the limits of performance, innovation and operator control. Today’s FlexRadio SDRs are powerful, practical and intuitive, making them a perfect choice for everything from high-stakes contesting and remote operation to casual weekend ragchewing. It’s no wonder they’ve earned a...
A true pioneer in software-defined radio (SDR) technology, FlexRadio Systems revolutionized amateur radio by introducing the first SDR transceiver that could be upgraded with simple software downloads—no new hardware required. Since unveiling its groundbreaking SDR-1000 transceiver and PowerSDR platform in 2003, the company has continued to push the limits of performance, innovation and operator control. Today’s FlexRadio SDRs are powerful, practical and intuitive, making them a perfect choice for everything from high-stakes contesting and remote operation to casual weekend ragchewing. It’s no wonder they’ve earned a devoted following among hams worldwide!
DX Engineering proudly carries a wide range of FlexRadio transceivers and accessories, making it easy for anyone to step into the future of RF. Whether you’re just getting started or ready to upgrade to the latest high-tech gear, FlexRadio delivers the performance advantage modern operators demand.
FlexRadio 8400ATU Signature Series HF/6-Meter SDR Transceivers
FlexRadio 8400ATU Signature Series SDR Transceivers offer the latest in high-performance, direct sampling software-defined radio (SDR) technology designed for the HF and 6-meter amateur bands. Designed for hams who operate exclusively via remote access, the FLEX-8400 is engineered as a server-based SDR transceiver. It supports SmartSDR clients on Windows, Mac, iOS, and Maestro, allowing seamless control from virtually anywhere. With dual independent receivers and full duplex cross-band capability, it's ideal for DXing, contesting, and digital modes—no external sound cards or interfaces required. The integrated automatic antenna tuner (ATU) is designed to match antennas with up to 3:1 SWR on 80–10 meters and up to 2.5:1 SWR on 160 and 6 meters. Using a PC, laptop, or Mac client, the FLEX-8400 supports up to two 7 MHz spectrum/waterfall displays and independent receivers, providing enhanced band visibility. Both receivers can operate simultaneously on any band and mode, with instant QSY between VFOs. Digital mode operation is streamlined—no sound cards, cables, or external interfaces required. The radio delivers advanced band awareness, low phase noise, brick wall filters, and high-quality audio performance to support a wide range of operating styles.
( 2 )
$2,706.55
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$2,849.00
FlexRadio 8600M HF/6-Meter Signature Series SDR Transceivers
FlexRadio 8600M HF/6-Meter Signature Series SDR Transceivers deliver top-tier performance through direct sampling SDR technology. Paired with a high-resolution display and ergonomic controls, the FLEX-8600M is an ideal choice for serious HF and 6-meter operators. It combines all the capabilities of the FLEX-8600 with a vibrant 8-inch 1920×1200 IPS WUXGA touchscreen and intuitive physical controls, offering high-performance SDR functionality in a traditional radio interface. Integrated display support provides unmatched band awareness, while compatibility with external monitors at 1920×1200 resolution enhances spectral visibility for advanced operations. The 8600M supports Adaptive Predistortion and includes a built-in antenna tuner, 10 MHz reference input, and an integrated GPS receiver with antenna to maintain frequency stability without manual adjustment. An optional GPSDO module is available for ultra-high frequency precision and accuracy. (sold separately) The FLEX-8600M features direct sampling SDR at 245.76 Msps with 16-bit resolution, achieving 115 dB RMDR at 2 kHz and >155 dB dynamic range. It supports 100W PEP HF-6m operation across all modes and bands, with contest-grade band filters offering >50 dB rejection for superior signal isolation. Operators can utilize four independent 14 MHz spectrum/waterfall displays and four independent band/mode receivers, offering game-changing band awareness. The transceiver supports full duplex cross-band operation on two antennas, allowing simultaneous transmit and receive on different bands without external equipment. It also enables true diversity reception to improve weak signal detection in high interference environments. Additional connectivity includes two receive-only ports and two transverter/exciter ports, which can also serve as receive antenna inputs. The FLEX-8600M provides an economical SO2R solution with OTSPR support, enabling a complete legal-limit, all-mode SO2R station when paired with the Power Genius XL LDMOS solid-state amplifier—requiring only one radio, one amp, and three cables. (amp and cable sold separately) FlexRadio's SmartSDR™ software ensures compatibility across the entire FLEX-8000 series and supports continuous software enhancements. With SmartLink™ technology, users can access their radio from anywhere using any SmartSDR-compatible client with just a login and password—even from an iPhone.
( 1 )
$5,899.00
FlexRadio 8600 HF/6-Meter Signature Series SDR Transceivers
FlexRadio 8600 HF/6-Meter Signature Series SDR Transceivers deliver top-tier performance using direct sampling SDR technology, making it an ideal choice for serious HF and 6-meter operators. Designed for remote operation, the FLEX-8600 functions exclusively as a server, accessible via PC, laptop, Maestro, Mac*, or iOS* clients—locally or remotely. This model supports Adaptive Predistortion and includes a built-in antenna tuner, 10 MHz reference input, and an integrated GPS receiver with antenna to maintain frequency stability without manual adjustment. An optional GPSDO module is available for ultra-high frequency precision and accuracy. (sold separately) The FLEX-8600 features direct sampling SDR at 245.76 Msps with 16-bit resolution, achieving 115 dB RMDR at 2 kHz and >155 dB dynamic range. It supports 100W PEP HF-6m operation across all modes and bands, with contest-grade band filters offering >50 dB rejection for superior signal isolation. Operators can utilize four independent 14 MHz spectrum/waterfall displays and four independent band/mode receivers, offering game-changing band awareness. The transceiver supports full duplex cross-band operation on two antennas, allowing simultaneous transmit and receive on different bands without external equipment. It also enables true diversity reception to improve weak signal detection in high interference environments. Additional connectivity includes two receive-only ports and two transverter/exciter ports, which can also serve as receive antenna inputs. The FLEX-8600 provides an economical SO2R solution with OTSPR support, enabling a complete legal-limit, all-mode SO2R station when paired with the Power Genius XL LDMOS solid-state amplifier—requiring only one radio, one amp, and three cables. (amp and cable sold separately) FlexRadio's SmartSDR™ software ensures compatibility across the entire FLEX-8000 series and supports continuous software enhancements. With SmartLink™ technology, users can access their radio from anywhere using any SmartSDR-compatible client with just a login and password—even from an iPhone.
Not Yet Reviewed
$4,899.00
FlexRadio Aurora 500W HF+6M SDR Transceivers
FlexRadio AURORA™ SERIES is an all-new family of HF + 6M transceivers featuring the world's first truly integrated 500 watt SDR transmitter. The Aurora Series defines a new category in amateur radio, eliminating the traditional boundaries between transceiver, amplifier, tuner, and power supply. Designed for the modern operator, the Aurora Series delivers exceptional RF performance in a radically compact form factor—leveraging cutting-edge high-efficiency technology that produces more power with less weight, lower heat, and dramatically reduced power input requirements. Aurora Series transceivers are network ready, designed for remote access with SmartSDR clients on any Windows, macOS, iPad®, iPhone®, or Maestro™ device, in your shack, easy chair, or from virtually anywhere in the world! All four Aurora versions offer full coverage reception of 30 kHz to 54 MHz in real time for complete visibility and control across the bands. The AU-510/510M has a single SCU (Spectral Capture Unit) that digitizes the RF spectrum for signal processing and display, supporting up to 2 slice receivers and 2 simultaneous panadapters. AURORA AU-510 & AU-510M Features: • AU-510 Headless Transceiver with Integrated Remote Operation with a Maestro™, iPad®, iPhone® or PC/Laptop • AU-510M Maestro Front Panel Transceiver with 8-Inch 1920 X 1200 IPS Display and HDMI® external monitor port • 500W PEP HF, 200W 6m operation with 80% nominal efficiency • Integrated AC/DC Power Supply, 80-264VAC, 47-63Hz, PF > 0.94 • All Modes/Amateur Bands 160m-6m • Two Independent Band/Mode Receivers • Full Duplex Cross-Band Operation • One Receive Only Port • One Transverter/Exciter Port • Direct Sampling SDR 122.88Msps, 16 bit • 115 dB 2kHz RMDR • >145 dB Dynamic Range • Built in 500W Antenna Tuner • 10 MHz Reference Input • Integrated GNSS receiver with antenna maintains radio frequency with no adjustments • Optional High-performance GPSDO provides 10MHz output for external equipment The AU-520/520M features two independent SCUs, each capable of digitizing wide portions of the 30 kHz to 54 MHz spectrum simultaneously. This dual-SCU configuration allows for up to 4 slice receivers and 4 independent panadapters, making them a powerful choice for contesting, diversity reception, multi-band monitoring, and advanced digital operation. AURORA AU-520 & AU-520M FEATURES: • AU-520 Headless Transceiver with Integrated Remote Operation with a Maestro™, iPad®, iPhone® or PC/Laptop • AU-520M Maestro Front Panel Transceiver with 8-Inch 1920 X 1200 IPS Display and HDMI® external monitor port • 500W PEP HF, 200W 6m operation with 80% nominal efficiency • Integrated AC/DC Power Supply, 80-264VAC, 47-63Hz, PF > 0.94 • All Modes/Amateur Bands 160m-6m • Integrated Remote Operation with a Maestro™, iPad®, iPhone® or PC/Laptop • Four Independent Band/Mode Receivers • Full Duplex Cross-Band Operation • True Diversity Reception • Two Receive Only Ports • Two Transverter/Exciter Ports • Integrated SO2R Solution (OTRSP) Support in one radio • Contest Band Filters: >50dB Rejection band-to-band • Direct Sampling SDR 245.76Msps, 16 bit • 115 dB 2kHz RMDR • >155 dB Dynamic Range • Built in 500W Antenna Tuner • 10 MHz Reference Input • Integrated GNSS receiver with antenna maintains radio frequency with no adjustments • Optional High-performance GPSDO provides 10MHz output for external equipment
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$6,199.00
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$9,599.00
FlexRadio Maestro Control Consoles
FlexRadio Maestro Control Consoles are an intuitive, plug-and-play control console that allows you to operate any FLEX-6000, FLEX-8000, or Aurora Series transceiver without a traditional PC. Simply connect Maestro directly or via your local area network (LAN) to begin operating. Frequently used controls are placed within easy reach and clearly labeled for efficient, low-motion operation. Less common functions are accessible through the large capacitive touch LCD, which supports intuitive pan, zoom, tune, and menu navigation—like modern smartphones and tablets. CW paddles can also be connected directly for seamless integration. With its compact, lightweight design and minimal wiring, Maestro offers flexible placement anywhere in your shack or home. Maestro ships with Fixed Feet, Power Supply and an Ethernet Cable.
( 1 )
$1,519.05
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$1,599.00
FlexRadio 8400 Signature Series HF/6-Meter SDR Transceivers
FlexRadio 8400 Signature Series SDR Transceivers offer the latest in high-performance, direct sampling software-defined radio (SDR) technology designed for the HF and 6-meter amateur bands. Designed for hams who operate exclusively via remote access, the FLEX-8400 is engineered as a server-based SDR transceiver. It supports SmartSDR clients on Windows, Mac, iOS, and Maestro, allowing seamless control from virtually anywhere. With dual independent receivers and full duplex cross-band capability, it's ideal for DXing, contesting, and digital modes—no external sound cards or interfaces required. Using a PC, laptop, or Mac client, the FLEX-8400 supports up to two 7 MHz spectrum/waterfall displays and independent receivers, providing enhanced band visibility. Both receivers can operate simultaneously on any band and mode, with instant QSY between VFOs. Digital mode operation is streamlined—no sound cards, cables, or external interfaces required. The radio delivers advanced band awareness, low phase noise, brick wall filters, and high-quality audio performance to support a wide range of operating styles.
( 4 )
$2,499.00
FlexRadio 8400M HF/6-Meter Signature Series SDR Transceivers
SDR technology, paired with a high-resolution display and ergonomic controls. The FLEX-8400M combines all the capabilities of the FLEX-8400 with a stunning 8-inch 1920×1200 IPS WUXGA touchscreen and intuitive controls, delivering high-performance SDR functionality in a traditional radio interface. Unmatched band awareness comes from the integrated display, while support for external monitors at 1900×1200 resolution enhances spectral visibility. Designed with input from top contest and DX operators, the symmetrical and independent dual VFO controls are strategically placed to maximize productivity across all operating styles. Fully self-contained, the transceiver requires no PC, network, or steep learning curve—just plug in and operate. When connected to a PC, laptop, or Mac client, users can access up to two 7 MHz spectrum/waterfall displays and independent receivers, transforming how bands are viewed. Both receivers can operate simultaneously on any band and mode, with instant QSY between VFOs. Digital mode operation is streamlined—no sound cards, cables, or external boxes needed. FlexRadio's industry-leading SmartSDR™ software ensures compatibility across the entire FLEX-8000 Signature Series, enabling continuous software enhancements. With SmartLink™ technology, remote access is simple—just log in from any SmartSDR-compatible client, including an iPhone.
( 4 )
$3,649.00
FlexRadio 8400MATU HF/6-Meter Signature Series SDR Transceivers
FlexRadio 8400MATU HF/6-Meter Signature Series SDR Transceivers feature an integrated antenna tuner (ATU), and the latest direct sampling SDR technology, paired with a high-resolution display and ergonomic controls. The FLEX-8400M combines all the capabilities of the FLEX-8400 with a stunning 8-inch 1920×1200 IPS WUXGA touchscreen and intuitive controls, delivering high-performance SDR functionality in a traditional radio interface. Unmatched band awareness comes from the integrated display, while support for external monitors at 1900×1200 resolution enhances spectral visibility. The integrated automatic antenna tuner (ATU) is designed to match antennas with up to 3:1 SWR on 80–10 meters and up to 2.5:1 SWR on 160 and 6 meters. Designed with input from top contest and DX operators, the symmetrical and independent dual VFO controls are strategically placed to maximize productivity across all operating styles. Fully self-contained, the transceiver requires no PC, network, or steep learning curve—just plug in and operate. When connected to a PC, laptop, or Mac client, users can access up to two 7 MHz spectrum/waterfall displays and independent receivers, transforming how bands are viewed. Both receivers can operate simultaneously on any band and mode, with instant QSY between VFOs. Digital mode operation is streamlined—no sound cards, cables, or external boxes needed. FlexRadio's industry-leading SmartSDR™ software ensures compatibility across the entire FLEX-8000 Signature Series, enabling continuous software enhancements. With SmartLink™ technology, remote access is simple—just log in from any SmartSDR-compatible client, including an iPhone.
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$3,799.05
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$3,999.00
FlexRadio FlexControl USB Multi-Function Tuning Knobs
FlexRadio FlexControl USB Multi-Function Tuning Knobs are a precision-engineered accessory designed to enhance the experience of Amateur Radio operators using SmartSDR or PowerSDR software. Featuring an ergonomic design and intuitive interface, FlexControl delivers tactile control over tuning and other radio functions, making it an indispensable tool for serious operators. Its plug-and-play USB interface ensures quick and easy setup, while the programmable multi-function knob and push buttons provide customizable functionality for a highly personalized operating experience.
( 4 )
$199.00
FlexRadio Maestro C Batteries
FlexRadio Maestro C Batteries are 14.4V, 6900 mAh batteries to provide your Maestro C with up to 10 hours of runtime while on battery. The battery will charge automatically when inserted into your Maestro C or with the optional external battery chargers.
Not Yet Reviewed
$215.00
FlexRadio Maestro Hinged Feet
FlexRadio Maestro C Hinged Feet are constructed from black anodized aluminum and feature constant torque hinges with no adjustments required. This will hold your Maestro at the perfect viewing angle for whatever surface you sit it on. The feet will also fold flat against the back of the Maestro C console for easier transport.
( 2 )
$99.99
FlexRadio Hand Microphones
FlexRadio Hand Microphones feature condenser elements, and are designed for use with the FlexRadio 6000 series radios. Simply connect the TRS and RCA connectors to the appropriate jacks on the back of the radio and you're ready to operate in voice modes. NOTE: If you want to use the FHM-3-TRSRCA with the Maestro you will need the FRI-MAE-C-ADAPTR Adapter kit.
Not Yet Reviewed
$69.99
FlexRadio Maestro Acrylic Dust Covers
FlexRadio Maestro Acrylic Dust Covers are form fitting covers to protect the screen and controls of your Maestro A, B or C from scratches dust and damage when not in use or while transporting the Maestro Control Console.
( 1 )
$59.99
FlexRadio Rack Mount Brackets
FlexRadio Rack Mount Brackets are black anodized aluminum designed to facilitate mounting your Flex 8400 or 8600 series radio in a standard 19" rack.
Not Yet Reviewed
$99.00
FlexRadio Flex Antenna Tuner Plug-in Module Kits
FlexRadio Antenna Tuner Plug-in Module Kits offer a convenient, user-installable solution for enhancing your Flex 8400(M)/8600(M) transceiver's performance. Designed for flexibility, these kits allow operators to customize their radios based on operational needs. The FLEX-8400 Automatic Antenna Tuner can match up to a 3:1 SWR on 80–10 meters and up to 2.5:1 SWR on 160 and 6 meters, ensuring efficient power transfer and reliable operation across a wide frequency range.
( 1 )
$350.00
FlexRadio USB to Serial Adapters
FlexRadio USB to Serial Adapters are genuine FTDI chipset USB to Serial adapters for the FlexRadio 6000 and 8000 to control external devices that utilize the RS-232 protocol. Requires SmartSDR 1.10 for this functionality. Note: This is not for CAT control of the radio, this is for controlling external devices attached to the USB ports on the back of the 6000/8000 series radios.
Not Yet Reviewed
$49.99
FlexRadio Maestro Microphone Adapter Kits
FlexRadio Maestro Microphone Adapter Kits allow you to connect your FHM-3 microphone to your Maestro C Console. The Kit consists of: • CTIA Stereo Jack Y Cable • 1/8 in. (3.5mm) Mono to RCA adapter for the PTT connector. This kit is simple to use as well: 1. Connect the Y cable to the Headset (HDST) Connector on the back of the Maestro C 2. Connect the TRS headset to the connector that has the small headset symbol etched on the jack 3. Connect the TRS microphone to the connector that has the small microphone symbol etched on the jack. Note: This adaptor requires microphones with a TRS (stereo) connector. Microphones with a TS (mono) connector will not function correctly, if your microphone has a TS Connector contact the vendor for assistance. 4. Connect the 1/8" TS to RCA adapter to the PTT jack on the Maestro and connect your PTT device (PTT on mic, Hand or Foot Switch)
Not Yet Reviewed
$15.00
FlexRadio Embroidered Hats
FlexRadio Embroidered Hats are one way to show your enthusiasm for your favorite radio brand. These 6 panel ball caps are made from cotton twill with a precurved bill. Featuring a hideaway adjustable strap with a brass buckle and brass grommet, this hat is one size fits all.
Not Yet Reviewed
$15.00
FlexRadio Maestro C Battery Chargers
FlexRadio Maestro C Battery Chargers are designed to charge the RRC-2054-2 battery packs for the Maestro Control Console. These are a great option if you have more than one battery pack for the Maestro as they are able to charge the packs outside of the Maestro Console. These battery chargers come in two varieties: Single or dual configuration. AC power cable included. NOTE: Not required if you charge the battery installed in your Maestro.
Not Yet Reviewed
$160.00
FlexRadio Maestro C AC Power Supplies
FlexRadio Maestro C AC Power Supplies are the same power supplies that are supplied with the Maestro C Console. This is a replacement if you need a second power supply for a second location or if the supplied power supply is damaged. Note: This power supply will not work with the Maestro A or B series consoles.
Not Yet Reviewed
$64.95
FlexRadio Transceiver Handles
FlexRadio Transceiver Handles are designed to allow you to easily move your Flex Radio Transceiver. These handles fit the Flex 6400, Flex 6600, Flex 8400, and Flex 8600 series radios. These handles will not work on the M models.
Not Yet Reviewed
$99.00
FlexRadio Power Cable Assemblies
FlexRadio Power Cable Assemblies are replacement power cables for the FlexRadio 6000 and 8000 series radios. This cable is useful if you are transporting your Radio between two locations and don't want to have to worry about forgetting the power cable.
Not Yet Reviewed
$29.99
FlexRadio 8400/8600 GPSDO Upgrade Modules
FlexRadio 8400/8600 GPSDO Upgrade Modules are an optional, high-precision GPS Disciplined Oscillator designed to elevate the performance of your FLEX-8000 series transceivers. By synchronizing with global GNSS signals, the GPSDO Module provides an exceptionally accurate 10MHz reference signal via a rear panel BNC, ensuring your radio operates with unparalleled frequency stability. This advanced module is ideal for users who demand precise timing and frequency control, such as in weak-signal work, transverter digital modes, or environments where consistent accuracy is critical. Your FLEX-8000 system benefits from enhanced stability and the reliability of a state-of-the-art GNSS timing solution. Whether you're a serious contester, an avid DXer, or simply looking to optimize your station's performance, the GNSSDO is a valuable addition taking your FLEX-8000 experience to the next level.
Not Yet Reviewed
$749.00