miniDSP Flex HT
miniDSP Flex HT, 400MHz Sharc DSP audio processor, toolbox for subwoofer or multiway speaker tuning, USB/HDMI ARC/EARC, Optional WISA, Optional Multichannel Dirac Live license for room correction,
The Flex HT is miniDSP’s answer to our customers looking for a pocket sized multichannel processor with HDMI ARC/eARC capabilities . Our team was able to cram a full eight channels of DSP power and a wide range of I/O into the unbelievably compact enclosure.
Eight-channel audio input is via eARC linear PCM over HDMI, or USB Audio. Additional stereo input is supported over SPDIF and TOSLINK optical. Internally, we’ve provided a full suite of miniDSP flexible’s routing and audio processing features: bass management, parametric EQ, crossovers, advanced biquad programming and delay/gain adjustments. In addition, the miniDSP Flex HT is software-upgradable with full-frequency Dirac Live®, the world’s premiere room correction system.
The eight-channel analog RCA outputs feature class-leading low noise and distortion figures. Last but not least, the Flex HT is miniDSP's first product to include WiSA (“Wireless Speaker and Audio Association”) capability as an optional feature(future). WiSA is designed specifically for low-latency multichannel audio – a perfect match for the Flex HT. The WiSA transmitter will allow lossless transmit of all eight output channels to WiSA-compatible speakers and subwoofers. Note that WISA feature will be a hardware option on future shipments (ETA Q1 2024) and isn't included at this point of time.
The miniDSP Flex HT is the perfect solution for a modern compact processor for home theater and multichannel sound. You just need to let your creativity do the rest!
REMINDER: Please note that the Flex HT does not support bitstream (e.g. Dolby/DTS) decoding. The audio source must be able to output linear PCM (LPCM) for multichannel support over HDMI.
Hardware Features
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Processor: 32-bit floating-point 400MHz Analog Devices SHARC DSP
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Multi-Core USB Audio processor (XMOS)
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HDMI EARC/ARC interface for multichannel audio in PCM. Note that Flex HT doesn't support bistream format (Dolby/DTS encoded).
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Optional WISA (Future option / ETA Q1 2024): Multichannel (8ch) low latency, synchronized, Wireless audio. Compatible with compliant Wisa speakers.
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Optional upgrade to Dirac Live® 3.x Digital Room Correction, Multichannel (8ch) Full Range Room Correction (20~20kHz)
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Audiophile performance with very low noise floor and distortion (SNR @128dB(A), THD+N @ -111dB (0.0003%)
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Inputs: Stereo digital (SPDIF/Optical), Multichannel USB Audio streaming (up to 7.1)
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Outputs: 8 channels audio duplicated to unbalanced (RCA) and WISA Wireless audio.
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White/Black OLED front panel controller with IR control
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Control and configuration by miniDSP Device Console (DC)
Product Downloads
What's in the box?
- Digital Audio Processor - Flex HT
- IR remote v2
- 12V univeral power supply (UK/EU/US/AU plugs)
- USB cable
Optional Items
- UMIK-1 or UMIK-2 Measurement microphone
- Dirac Live v3.x Upgrade for Multichannel (8ch) Full range correction (20~20kHz) / Must be selected in the shopping cart as an option.
- Microphone tripod
NOTE: The UMIK-1/2 are measurement microphones approved by Dirac Research. Knowing the major effect a wrong calibration/measurement would have on the final results of Dirac Live tuning, we strongly recommend that you select a UMIK-1/2 microphone together with your platform for a plug&play experience leading to best results. Any issues related to 3rd party microphones such as ASIO/USB audio driver incompatibility/Latency problems or incorrect calibration process will not be under our support structure by our support team.
Audio Precision APX555 measurements
Here are few measurements of the Flex HT (Digital IN, Unbalanced RCA out) for THD+N/SINAD/Dynamic Range with DRE enabled & THD+N
miniDSP Device Console (DC)
Flex HT leverages miniDSP Device Console (DC), our newest real time control interface with free Over The Air (OTA) upgrades for software and firmware upcoming enhancements.
Application Notes
The Perfect Apple TV companion
The Apple TV 4k is the perfect streaming partner for the miniDSP Flex HT and Flex HTx. Combined with an eARC-enabled TV, a modern compact A/V system with Dirac Live®, the world's premiere room correction system, has never been easier to set up!
Multiway + Dirac Live
miniDSP's multichannel audio processors with Dirac Live room correction can implement advanced multiway active speakers. Any number of "ways" and speakers can be implemented up to the number of output channels. Check out our app note on how to get started!
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Description |
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Digital Signal Processing Engine |
Analog Devices Floating point SHARC DSP: ADSP21489 @ 400MHZ |
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Processing resolution / Sample rate |
32 bit/48 kHz |
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USB Audio support |
UAC2 Audio - ASIO driver provided (Windows) - Plug&Play (Mac/Linux) |
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Input/Output DSP structure |
8h IN(USB/HDMI) or 2ch IN(TOSLINK/SPDIF) => DSP => 8 ch OUT (Analog & WISA outputs) |
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Digital Stereo Audio |
1 x SPDIF (stereo) on RCA connector, |
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HDMI connectivity |
ARC/EARC compliant for up to 8ch of LPCM audio streaming |
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WISA (Wireless Audio) |
(Future Option) |
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Digital Audio Output Connectivity |
Not Applicable |
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Analog Audio Output Connectivity |
8 x Unbalanced RCA |
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Analog Audio Output Impedance |
200 Ω |
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Analog Output Max Level |
2 V RMS |
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Frequency Response |
20 Hz – 20 kHz ± 0.05 dB |
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SNR (Digital to Analog) |
125 dB(A) with DRE enabled |
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THD+N (Digital to Analog) |
-111 dB (0.0003 %) |
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Crosstalk (Digital to Analog) |
-120 dB |
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Filtering Technology |
miniDSP DSP toolbox (routing, bass management, parametric EQ, crossover, gain/delay). |
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DSP Presets |
Up to 4 presets |
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Dimensions |
150x180x41 mm |
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Accessories |
IR Remote |
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Power Supply |
Included external switching PSU 12V/1.6A (US/UK/EU/AU plugs) |
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Trigger out |
12V trigger out controls external ON/OFF powering of amplifiers |
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CEC control |
HDMI CEC command for Mute/Volume/Standby |
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Power Consumption |
4.8 W (idle, Wisa OFF), 6.5W (idle, Wisa ON) |
Community Forum
FAQ's & Support portal
Application notes on the miniDSP Flex HT platform
In this application, we go step by step on how to use Flex HT with HDFury Arcana and Vrroom product. Stay tuned for more updates.
In this application note, we will show you how to design an active 2-way loudspeaker with the miniDSP 2x4 HD/Flex. Using the 2x4 HD/Flex, you can either create a conventional (Linkwitz-Riley or Butterworth) crossover, or a linear phase crossover.
In this application note, we will show you how to integrate a subwoofer with your existing loudspeakers by using a miniDSP 2x4 HD/Flex. You can use an existing preamp, or replace a preamp and a DAC with the miniDSP 2x4 HD/Flex. (In the latter case, you will need to program a remote control to adjust volume in the miniDSP 2x4 HD.)
In this app note, we will demonstrate subwoofer integration for miniDSP's stereo Dirac Live processors using only the Dirac Live app for measurement
In this application note, we show you how to use Room EQ Wizard (REW) and its integration with miniDSP to equalize your subwoofer.
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