miniDSP Flex - Digital

The miniDSP Flex is the 3rd generation of our popular line of compact 2-in, 4-out audio processors. It retains the powerful floating point processor but rethinks the I/O architecture so we can provide our customers with different input-output versions in this compact chassis. The initial versions are single-ended analog I/O (RCA), balanced analog I/O (TRS) and digital out with superb audiophile specification for your enjoyment.

All versions include a set of digital inputs: USB audio, S/PDIF (RCA/optical) and Bluetooth (LDAC/aptX). An OLED front panel display and volume control/encoder knob provides easy control. As always, the Flex series is jam-packed with miniDSP’s tried and proven audio processing functionality: flexible parametric EQ, IIR & FIR filters, crossovers, advanced biquad programming and delay on each output channel. Last but not least, all platforms are easily software-upgradable with Dirac Live®, the world’s premiere room correction system for full range (20~20kHz) tuning.

The miniDSP Flex will find a myriad uses in applications ranging from a compact digital stereo preamp through subwoofer integration and optimization to active speakers, home theater and recording studios. You just need to let your creativity do the rest!

Hardware Features
Processor: 32-bit floating-point 400MHz Analog Devices SHARC DSP
Multi-Core USB Audio processor (XMOS)
Bluetooth streaming: LDAC™/aptX™ HD/aptX™/AAC/SBC
Optional upgrade to Dirac Live® 3.x Digital Room Correction, Full Range Room Correction (20~20kHz)
Audiophile performance: SNR@120dB(A), THD+N @ -110dB (0.0003%)
Inputs: Stereo digital (USB Audio/SPDIF/Optical/Bluetooth), stereo analog (Unbalanced RCA)
Flexible Output versions: Unbalanced (RCA), Balanced (TRS), Digital (TOSLINK & SPDIF)
USB audio recording feature (4xCH processed output via USB audio to record inputs, e.g. Vinyl)
White/Black OLED front panel controller with IR control
Compatible with miniDSP's Device Console

• Versions:
- Unbalanced RCA version
- Balanced 6.35 mm TRS jack version
- Digital version

• Digital Signal Processor Engine:
- Analog Devices floating-point DSP SHARC ADSP21489 @ 400 MHz

• Processing Resolution / Sample Rate:
- 32-bit / 96 kHz
- 32-bit / 48 kHz (with Dirac Live® license)

• USB Audio Support:
- UAC2 bidirectional audio
- ASIO driver support (Windows)
- Plug & Play (Mac / Linux)

• Input / Output Configuration:
- 2 channels input / 4 channels output

• Digital Audio Input Connectivity:
- 1 x SPDIF (RCA)
- 1 x Optical (TOSLINK)
- 1 x USB audio (stereo)
- 1 x Bluetooth (LDAC™ / aptX™ HD / aptX™ / AAC / SBC)
- Supported sample rate: 20 – 216 kHz

• Digital Audio Output Connectivity:
- 4 x output channels (Post DSP) on USB audio
- 4 x output channels (Post DSP) on USB audio
- 4 x output channels (Post DSP) on USB audio + SPDIF & TOSLINK (duplicated)

• Analog Audio Input Connectivity:
- RCA version:
- 2 x Unbalanced RCA
- TRS version:
- 2 x Balanced 6.35 mm TRS jack (as XLR)
- Digital version:
- 2 x Unbalanced RCA

• Analog Audio Output Connectivity:
- RCA version:
- 4 x Unbalanced RCA
- TRS version:
- 4 x Balanced 6.35 mm TRS jack (as XLR)
- Digital version:
- N/A

• Analog Audio Input Impedance:
- RCA / Digital: 100 kΩ
- TRS: 200 kΩ

• Analog Audio Output Impedance:
- RCA / TRS: 200 Ω
- Digital: N/A

• Analog Audio Input / Output Max Levels:
- RCA: 2 V RMS / 2 V RMS
- TRS: 4 V RMS / 4 V RMS
- Digital: 2 V RMS / N/A

• Frequency Response:
- RCA: 20 Hz – 20 kHz ± 0.1 dB
- TRS: 20 Hz – 20 kHz ± 0.1 dB
- Digital: 20 Hz – 20 kHz ± 0.01 dB

• SNR (Digital to Analog):
- RCA: 120 dB(A)
- TRS: 121 dB(A)
- Digital (D>D): 137 dB(A)

• THD+N (Digital to Analog):
- RCA: -110 dB (0.0003%) ± 3 dB
- TRS: -112 dB (0.00025%) ± 3 dB
- Digital (D>D): -130 dB (0.00003%)

• Crosstalk (Digital to Analog):
- RCA: -120 dB
- TRS: -128 dB
- Digital (D>D): -165 dB

• SNR (Analog to Analog):
- RCA: 115 dB(A)
- TRS: 116 dB(A)
- Digital (A>D): 115 dB(A)

• THD+N (Analog to Analog):
- RCA: -106 dB (0.0005%) ± 3 dB
- TRS: -108 dB (0.0004%) ± 3 dB
- Digital (A>D): -108 dB (0.0004%)

• Crosstalk (Analog to Analog):
- RCA: -115 dB
- TRS: -123 dB
- Digital (A>D): -115 dB

• Filtering Technology:
- FIR + IIR
- Optional Dirac Live® 3.x Full Range correction (20 Hz – 20 kHz)

• DSP Presets:
- Up to 4 presets

• Dimensions:
- 150 x 180 x 41 mm

• Accessories:
- IR Remote

• Power Supply:
- External switching PSU 12V / 1.6A
- Includes US / UK / EU / AU plugs

• Power Consumption:
- RCA version:
- 9.0 W (idle)
- 2.5 W (standby)
- TRS version:
- 10.3 W (idle)
- 3.1 W (standby)
- Digital version:
- 7.5 W (idle)
- 2.5 W (standby)