These don't mean much maybe, as the differences written here need bat ears to hear them. By the way, one of the questions I had was whether Cube is making use of all channels of the ES9038PROs, and according to the A&K website, yes it is. So, 8 channels in mono mode per side driven in current mode.
SP2000 Audio Performance
Frequency Response
±0.015dB (Condition: 20Hz~20kHz) Unbalance / ±0.010dB (Condition: 20Hz~20kHz) Balance
±0.050dB (Condition: 20Hz~70kHz) Unbalance / ±0.030dB (Condition: 20Hz~70kHz) Balance
Signal to Noise Ratio 124dB @ 1kHz, Unbalance / 125dB @ 1kHz, Balance
Crosstalk -138dB @ 1kHz, Unbalance / -144dB @ 1kHz, Balance
THD+N 0.0005% @ 1kHz, Unbalance / 0.0004% @ 1kHz, Balance
IMD SMPTE 0.0003% 800Hz 10kHz(4:1) Unbalance & Balance
Output Impedance Balanced out 2.5mm (1ohm) / PHONES 3.5mm (1.5ohm)
Clock Jitter 25ps(Typ)
Reference Clock Jitter 200 Femto Seconds
KANN Cube Audio Performance
Frequency Response [Phone Out]
±0.027dB (Condition : 20Hz~20kHz) Unbalance / ±0.025dB (Condition : 20Hz~20kHz) Balance
±0.070dB (Condition : 10Hz~70kHz) Unbalance / ±0.087dB (Condition : 10Hz~70kHz) Balance
Signal to Noise Ratio [Phone Out] 117dB @ 1kHz, Unbalance / 117dB @ 1kHz, Balance
Crosstalk [Phone Out] 129dB @ 1kHz, Unbalance / 136dB @ 1kHz, Balance
THD+N [Phone Out] 0.0004% @ 1kHz, Unbalance / 0.0005% @ 1kHz, Balance
IMD SMPTE [Phone Out] 0.0005% 800Hz 10kHz(4:1) Unbalance / 0.0006% 800Hz 10kHz(4:1) Balance
Output Impedance PHONES 3.5mm (1.2ohm) / Balanced out 2.5mm (1.6ohm)
Reference Clock Jitter 250 Femto Seconds