真正全平衡全分立件耳機放大器(簡稱:全平衡耳放)

 

全晶體管分立件全平衡設計

儀器級線性LDO穩壓電源達雙12V供電

全晶體管分立件信號增益級和輸出功放級

強大輸出3000mW at 40 ohm

 

產品概述:

Less BX-2是真正全平衡分立件耳機放大器設計,信號增益級採用“CAST”(Current Audio Signal Transmission)電流信號傳輸方式,為完全無負回輸的晶體管放大電路,整體頻率響應高速,動態凌厲,聽感上清晰通透,細節細膩豐富。

 

本機的電流放大皆由配對的雙晶體管組成,全時間A類工作狀態 ,信號增益級及功率放大都工作在全時間電流傳輸模式,可提供極低的失真及極佳的線性放大,信號傳輸與放大方面可以做到更低音染、中性,更好鉅細無遺地反映在音源前端。

 

本機具XLR平衡輸入,同時亦可以RCA信號源輸入,當RCA 信號源輸入時,電路將自動切換到平衡方式。所有的RCA / XLR輸入信號通過前端V/I轉換FET-BUFF得到恆定輸出阻抗予信號增益級,更好地搭配各種播放器之間的不同輸入阻抗。

 

  輸出級採用4對12.5W的發燒名對管BD139/BD140,在全時間Class-A工作狀態下,得到更大的輸出功率,即使驅動600ohm大耳機也游刃有餘。

使用說明:

1、Less BX-2使用3.7V,容量8000mAh聚合物鋰電池,支援5V 3A-USB(TYPE-C)快速充電,鋰電設有低電及短路保護.

2、充電LED顯示:充電時,四個指示燈相繼閃爍;滿電時,四個指示全亮。

3、工作LED指示:開機時,4顆LED電量狀態指示,2秒後自動熄滅;電量不夠時, 4?LED會顯示當前電池電量 ,約2秒后自動熄滅),約2秒后自動滅燈)

 

電氣規格:

S/N Ratio >125DB at 1KHz

THD : < 0.002%

Bal-Gain:+8DB(Lo-gain);16DB(Hi-gain)

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聚合物鋰電池,容量8000mAh

Size: W93 X L137 X H28 mm

Operating ambient temperature range:-40℃~85℃

 

 

ROMI-AUDIO Balanced headphone AMP Less BX-2

 

.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 :

 

  Less BX-2 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;

 

  Less BX-2 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 .

 

 

  Less BX-2 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%. 

 

Specification

 

S/N Ratio >125DB at 1KHz

THD : < 0.002%

Bal-Gain:+8DB(Lo-gain);16DB(Hi-gain)

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℃

 

 

ROMI-AUDIO Balanced Headphone AMP Less BX-2

HK$4,980.00Price
  • Bundle of Balanced Headphone Amplifier and male to male connection cable

    *(Purchase together and save up to HKD1000)
    *Head of connection cable optional: 2.5mm, 3.5mm, 4.4mm

Contact Us

852-2897-7725 

romiaudiohk@gmail.com

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