MASS-Kobo Model 485

The amplifier section of this model 485 is the same as the model 394II, but it has been equipped with an additional 4.4mm Pentaconn balanced output terminal.
Additionally, the balanced output is selected via a switch, similar to the Model 465, preventing issues that may arise when connecting multiple headphones.

Specifications
Model : Full Balanced Stereo headphone amp
Input : Electronically Balanced = XLR3-31 , Unbalance = RCA
Output : Balance = 4.4mm Pentaconn , XLR4-31 x 1 or XLR3-31 x 2(L,R) , Unbalance = φ6.3 TRS
Input Impedance : 3.7kΩ (XLR)/ 12kΩ (RCA)
Reference Input Level : +4dBm/-10dBm (XLR)/ -10dBm (RCA)
Maximum Input Level : +25dBm (XLR Ref +4dBm),+10dBm(XLR Ref -10dBm)/ +10dBm (RCA)
Maximum Output Level
(P-P) : Balance = Hi 24V, Low 18V (with 32Ω loaded, 1kHz, THD+N 0.05%)
          Unbalance = Hi 12V, Low 9V (with 32Ω loaded, 1kHz, THD+N 0.05%)
(RMS): Balance = Hi 8.5V, Low 6V (with 32Ω loaded, 1kHz, THD+N 0.05%)
          Unbalance = Hi 4.2V, Low 3V (with 32Ω loaded, 1kHz, THD+N 0.05%)
Maximum Output without Distortion : Balance = 2.2W , Unbalance = 600mW (with 32 ohm load, 1kHz, THD+N 0.05%)
Frequency Characteristics : 13Hz - 100kHz (-0.5dB)
Power Supply : AC100 - 240V, 50/60Hz
Electric Energy Consumption : 0.5A (with AC100V)
Size : 285mmW x 230mmD x 50mmH (except the rubber feet and projections)
        285mmW x 230mmD x 52mmH (including the rubber feet and projections)
Weight : 2.9kg (without the power cable)