ifi micro iDSD signature

Finely tuned

Based around two Burr-Brown DAC chips in a custom ‘interleaved’ configuration, the digital engine has four pairs of differential signals – two pairs per channel. This means

• a lower noise floor
• improved channel separation
• finer musical detail and micro-dynamics

The micro iDSD Signature handles up to PCM 768, DSD 512, 2xDXD and MQA. All this is done natively. Both PCM and DSD remain ‘bit-perfect’.

Circuit training

With up to 4100mW of power the micro iDSD Signature can drive all manner of headphones with aplomb, from highly sensitive in-ear monitors to current hungry planar headphones.

The signal path has been refined to maximise sonic texture. High spec components featuring class-leading qualities such as low ESR (Equivalent Series Resistance), high stability and low distortion mean top-notch sound quality and maximum musical enjoyment.

Add in the direct-coupled nature of the circuit – no coupling capacitor is present – and the micro iDSD Signature definitely runs rings around the competition.

In/Out

Digital InputsUSB 3.0 type A “OTG” Socket (USB2.0 compatible/with iPurifier® technology built-in)
S/PDIF (3.5m coaxial/optical)OutputS-Balanced: 4.4mm
SE: 6.3mm/RCA

DAC

DACBit-Perfect DSD & DXD, PCM DAC by Dual-core Burr BrownClockUltra low jitter GMT Femtosecond ClockFormatsDSD512/256/128/64,
Octa/Quad/Double/Single-Speed DSD,
DXD (768/705.6/384/352.8kHz),
Double/Single-Speed DXD
PCM (768/705.6/384/352.8/192/176.4/96/88.2/48/44.1kHz)
MQA

Filters

DSDExtreme/Extended/Standard BandwidthPCMBit-Perfect/Minimum-Phase/StandardDXDBit-Perfect Processing

Line Output

Dynamic Range (Line)>117db(A)THD & N (0dBFS Line)<0.003%Output Voltage (Line)>2VOutput Impedance<240ΩJitter (correlated)Below AP2 test set limit

Headphone Power Output

Turbo ModePower (max)10.0V/4,100 mWPower (continuous)>1,560 mW @ 64 Ohm
>166 mW @ 600 OhmNormal modePower (max)5.5V/1,900 mWPower (continuous)>100 mW @ 300 Ohm
>950 mW @ 32 OhmEco modePower (max)2.0V/500 mW @ 8 OhmPower (continuous)>250 mW @ 16 OhmDynamic Range (HP)>115dB(A) (Eco Mode, 2V Out)THD &N (HP 500mW/16R)< 0.008%Output Voltage (HP)>10V (Turbo Mode)Output Impedance<1Ω (iEMatch not engaged)
Maximum Output Power4,100 mW @ 16 Ohm LoadContinuous Output Power1,000 mW @ 64 Ohm Load

Spec

BatteryLithium-polymer 4800mAhPower SystemCharging via USB-C, BC V1.2 compliant up to1500mA charging currentDimensions172 x 67 x 27 mm
6.8" x 2.6" x 1.1"Weight295 g (0.65 Ibs)