miniDSP Flex HT Digital Audio Processor Owner’s Manual

June 10, 2024
MiniDSP

miniDSP - logo Flex HT

Flex HT Digital Audio Processor

Features

  • Floating point SHARC DSP
  • USB/HDMI/SPDIF/Optical inputs
  • Wireless Audio outputs via WISA
  • Dirac Live 3.x upgrade option

Hardware

  • ADI ADSP21489 @400MHz
  • Multichannel USB audio (8ch)
  • EARC/ARC HDMI input (8ch PCM)
  • 8ch DAC with audiophile specs SNR (125dB) & THD+N (0.0003%)
  • OLED front panel with IR control
  • 12V trigger output

Software Control

  • Real time live control
  • Win & Mac compatible
  • Firmware upgradeable
  • 4 preset memory
  • CEC control from TV

Applications

  • Home theater
  • PC based multichannel audio
  • WISA speaker tuning
  • Low latency gaming
  • Subwoofer integration

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 1 , 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. In addition, wireless digital output to WiSA wireless speakers and subwoofers is provided as standard. An  OLED front panel display and volume control/encoder knob provides easy control. 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!

  1. 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. Please check your device user manual.

miniDSP Flex HT Digital Audio Processor -

TYPICAL APPLICATION

miniDSP Flex HT Digital Audio Processor - TYPICAL

TECHNICAL SPECIFICATIONS

  Description
Digital Signal Processing Engine Analog Devices Floating point SHARC DSP:

ADSP21489 IF 400MHZ
Processing resolution / Sample rate| 32 bit/48 kHz
USB Audio support| UAC2 Audio – ASIO driver provided (Windows) – Plug&Play (Mac/Linux) Multichannel USB Audio interface (8ch) for up to 7.1 configurations
Input/Output DSP structure| 8ch IN (USB/HDMI) or 2ch IN (TOSLINK/SPDIF)=> DSP => 8 channels OUT(Analog & WISA outputs)
Digital Stereo Audio Input Connectivity| 1 x SPOIF (stereo) on RCA connector, 1 x OPTICAL (stereo) on Toslink connector Supported sample rates: 20 – 216 kHz / Stereo source will be automatically assigned to Input 1&2
HDMI connectivity| ARC/EARC compliant for up to 8ch of LPCM audio streaming Supported sample rates: 20 – 216 kHz
WARNING: No onboard Dolby/DTS decoding. Use your source (E.g. TV) to output in KM mode.
\VISA (Wireless Audio)| 8 channels outputs via low latency, uncompressed & tightly synchronized audio via WISA protocol 240it/48kHz, 5.2ms Fixed latency, 4./-21.6 synchronization, 5GHz spectrum
Digital Audio Output Connectivity| Not Applicable
Analog Audio Output Connectivity| 8 x Unbalanced RCA
Analog Audio Output Impedance| 200 Ω
Analog Output Max Level| 2 V RMS
Frequency Response| 20 Hz – 20 kHz ± 0.05 dB
SNR (Digital to Analog)| 125 dB(A) with DRE enabled
THD+N (Digital to Analog)| -111 dB (0.0003 %)
Crosstalk (Digital to Analog)| -120 dB
Filtering Technology| miniDSP DSP toolbox (routing, bass management, parametric EQ, crossover, gain/delay). Optional soft-ware upgrade to multichannel Dirac Live’ 3.x Full Range correction (20 Hz – 20 kHz)
DSP Presets| Up to 4 presets
Dimensions| 150x180x41 mm
Accessories| IR Remote
Power Supply| Included external switching PSU 12V/1.6A (US/UK/EU/AU plugs)
Trigger out| 12V trigger out controls external ON/OFF powering of amplifiers
CEC control| HDMI CEC command for MuteNolume/Standby
Power Consumption| 4.8 W (idle, Wise OFF), 6.5W (idle, WISA ON) 2.9 W (standby)

miniDSP Flex HT Digital Audio Processor - TYPICAL 1

Features and specifications are subject to change without prior notice

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Documents / Resources

| miniDSP Flex HT Digital Audio Processor [pdf] Owner's Manual
Flex HT Digital Audio Processor, Digital Audio Processor, Audio Processor
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