Ferrum OOR ERCO Gen 2 Headphone DAC/AMP

Headphone output gain:

balanced -5.8 dB, +6 dB, +17.8 dB;
single ended -11.8 dB, 0 dB, +11.8 dB

Operation:

fully balanced, proprietary IC power amp

Power inputs:

5.5/2.5 mm DC connector center positive; proprietary FPL 4-pin DC connector (FPL)

Analog inputs

RCA (REDbook level 2V RMS recommended,

PRO level supported)

Digital inputs:

USB-C (MQA, up to PCM 32-bit/768kHz, DSD512, DoP256)
S/PDIF coaxial (MQA, up to PCM 24-bit/
192 kHz, DoP64);
S/PDIF optical (MQA, up to PCM 24-bit/96 kHz guaranteed, should work up to PCM 24-bit/
192 kHz and DoP64 – depends of user’s optical cable and transmitter))

DAC chip:

ESS Sabre ES9028PRO

PCMsamplerates(kHz):

44.1/48/88.2/96/176.4/192/352.8/384/ 705.6 / 768 kHz

DSD sample rates (MHz):

2.8224 / 3.072 / 5.6448 / 6.144 / 11.2896 / 12.288 / 22.5792 / 24.576 MHz

MQA:

decoder and renderer (USB, OPTO and COAX)

Headphone jack outputs:

 balanced 4.4 mm (TRRRS);
unbalanced 6.35 mm (TRS)

Line Inputs

balanced XLR;
unbalanced RCA (both REDbook level: 4V RMS bal./2V RMS unbal.)

Volume Control

analogue with bypass option
(bypass for line outputs only)

Frequency Response

10 Hz – 30 kHz (+/- 0.05 dB)
10 Hz – >200 kHz (+/- 1 dB)

Output power unbalanced:

300 mW into 300 Ω; 1.7 W into 50 Ω

Output power balanced:

1.2 W into 300 Ω; 6.1 W into 50 Ω

THD on balanced output:

< 0.00018% / -115 dB, 1 mW into 16 Ω;
< 0.00018% / -115 dB, 100 mW into 16 Ω

THD on unbalanced output:

< 0.00032% / -110 dB, 1 mW into 16 Ω;
< 0.00057% / -105 dB, 100 mW into 16 Ω

Dynamic range analog:

130 dB (A-weighted)

Dynamic range digital:

120 dB (A-weighted)

Input impedance:

47 kΩ

Output impedance unbalanced:

22Ωonpre-amp

Output impedance unbalanced:

44 Ω on pre-amp

Output impedance Headphones:

< 0.3 Ω

Power consumption:

dle <15 W

Power adapter:

100-240V AC to 22-30V DC

Dimensions (W x D x H):

21.7 cm x 20.6 cm x 5 cm

Weight:

1.8 Kg