model394II Balance Headphone Amp.


All the products by Mass-Kobo are made to order.

This price is the only case to ship overseas.Payment is prepaid. (I produce it after you have paid)

Tariff and Ship cost not included

Delivery time is 2.5 month from 2month

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Model 394 is a full balanced amplifier from input to output.

You can enjoy natural and real sounds with it.
It is developed based on a special circuit, because we needed a headphone amp which can reproduce the musical sources without almost any noise in a process of development of condenser microphones.

It has a set of inputs that can be used either with XLR Balance Input or RCA Unbalance Input (Unbalance Input convert to Balance signal by inside amp.).

The power supply is AC 100V-240V, 50/60Hz for world wide use.

Model 394 can be of Abyss AB1266 also driven by the best sound quality.


Model : Full Balanced Stereo headphone amp
Input : Electronically Balanced = XLR3-31 , Unbalance = RCA
Output : Balance = XLR4-31 x 1 or XLR3-31 x 2(L,R) , Unbalance = 6.3 TRS x 2(High or Low)
Input Impedance : 3.7k (XLR)/ 12k (RCA)
Reference Input Level : +4dBm (XLR)/ -10dBm (RCA)
Maximum Input Level : +25dBm (XLR)/ +10dBm (RCA)
Maximum Output Level
(P-P) : Balance = Hi 24V, Low 18V (with 32 loaded, 1kHz, THD+N 0.05%)Unbalance = Hi 12V, Low 9V (with 32 loaded, 1kHz, THD+N 0.05%)
(RMS): Balance = Hi 8.5V, Low 6V (with 32 loaded, 1kHz, THD+N 0.05%) Unbalance = Hi 4.2V, Low 3V (with 32 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)