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Romi Audio RA200AMP+(全平衡耳擴)

Romi Audio RA200AMP+(全平衡耳擴)

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ROMI-AUDIO Balanced headphone AMP. RA200AMP-plus


.Transistor discrete HDAM full balanced circuit.

.Superlinear LDO dual 12V power supply.

.Transistor discrete HDAM line amp and power amp.

.powerful output 3000mW at 40 ohms


Product information :


RA200AMP-plus is full balanced headphone amplifier , line amp is using“CAST”(Current Audio Signal Transmission) current pass through, non-negative feedback transistor circuit, highest frequency response, more details.


Current amplifier is using matched pair transistor , full time class A . Line amp and power amp are working in full time current pass throuht , lower signal distortion and super liner booster, headphone output is more clear , natural and details;


RA200AMP-plus support full balance and unbalance clossover input, when unbalance input , will auto switch to  balanced output. Fet-buff working on balance and unbalance line amp circuit, can match most device input resistance.


Power output using 4 piars 12.5W BD139/140, full time class A ampifity can easy to driver more than 600 ohms headphone .



.RA200AMP-plus using 3.7V 8000mAh Li-ion battery, suppot 5V 3A USB type C fast charging, including low voilage & short circuit protection.

.LED power inductor : when the battery is charging ,4 LEDs is flashing. 4 LED battery full charged , 3 is 75% , 2 is 50% , 1 is less than 25%. 




S/N Ratio >125DB at 1KHz

THD : < 0.002%


Bal Output Power: 5000MW /  25 ohm ,3000MW / 40 ohm,1200mw/100 ohm 

Output impedance: 1ohm

Input impedance: 49K ohm (3.5mm) ,98K ohm(2.5mm或4.4mm-Bal)

Frequency Breadth (Bal-input): 20Hz - 20KHz ( +/- 0DB )

Power Requirement:DC IN 5V (TYPE-C,3A電流)

BATT:3.7V Li-ion battery 8000mAh

Size: W93 X L137 X H28 mm

Operating ambient temperature range:-40℃~85℃

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