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SABRE A18 ：是一款全分立元件大电流纯甲类耳机放大器，整机采用全对称差分放大，输入级采用K170/J74 JFET场效应管，场效应管有类似于电子管的特性，输入阻抗高，作为输入管使用，容易调整出比较润的听感。
使用了共源共基结构电路(沃尔曼电路)进行低失真宽频响的放大， 使用中功率音频对管MJE15030/31作为输出功率管，有足够低的输出内阻，和优异的声音表现。
整机全使用声音表现细腻，工作状态稳定的VISHAY BC高精度发烧电阻
加拿大plitron品牌高性能低漏磁变压器，TO3金属封装稳压管进行供电，让本机拥有足够高的动态和信噪比。NEUTRIK的接插件，保证接触可靠的信号传递。
过热，限流，等保护电路保证机器的安使用。
平衡/不平衡两种输入可方便的搭配其它音源器材，使用不同的接口进行声音的调整（例如接SABRE D18用两个不同的接口就可以得到两种不同风格的声音）
分立元件晶体管电路，最难处理的是晶体管之间的离散差别，制作不好就表现为：“力大声粗”钰龙韵不惜工本，每一只晶体管均经过数字晶体管图示仪进行挑选，精密配对，然后用它们装配SABRE A18，让它拥有细腻精致的声音表现
大电流甲类放大器，散热设计也是重点，SABRE A18的散热设计，和外壳设计溶为一体，厚达6mm的全铝合金外壳，就当作一个大型散热器得到充分利用，使得本机在大电流甲类工作状态下，能做到相对较小的积体，稳压管的散热器，是使用CNC铣削制作出来的，热量则通过机壳上的对流孔向外散出。热能能及时散出机外，使机内电路能能保持在最佳的工作状态下。
SABRE A18电路细节的设计，是经钰龙韵多年从事耳机相关产品研发之经验和众多高精密仪器进行辅助测量下完成，完善的全分立元件高性能的电路，手工配对的晶体管，让SABRE A18拥有贵气的声音。
在听感上，则是以高素质性能为基础，充分发挥钰龙韵调音团队的力量进行反复的调校，精密的调整每一只晶体管的工作状态来调整声音，让SABRE A18拥有能满足最苛刻的音响发烧友声音。
SABRE A18的声音，浑厚大气，温润细腻，高解析的细节表现，大动态的爆棚临场感，可充分的演绎不同风格类型的音乐。输出内阻低，声音中音富有音乐感，适合大多数耳机的搭配。
The SABRE A18 is one of the Class A headphone amplifier that uses the discrete components. The machine uses the fully symmetrical differential amplifier .The input stage uses the K170/J74 JFET,the characteristics of the JFET is similar to the electron tube,as the input stage,it is easy to adjust the nourishing sense of hearing.
The SABRE A18 uses the common-source and common-base circuit Structure(Wallman circuit) to carry out the amplification of the low distortion and wide frequency response.It uses the medium power audio paired tube MJE15030/31 as the output power tube, the output impedance is sufficiently low and the sound performance is the best.
The SABRE A18 uses the precise VISHAY BC resistances with military specification,so it can ensure that the machine will keep the precise working state in high-performance condition.
The SABRE A18 uses the high-performance transformer with low magnetic flux leakage whose brand is PLITRON from Canada and the voltage-regulator tube TO3 with metal packaging as the power supply,it can ensure that the machine has enough high dynamic and SNR. The connector of NEUTRIK can ensure the transmission of the reliable and high-quality signal.
The overheated and current-limiting protection circuit can ensure the safety of the use of the machine.
Using the balance/unbalance input interface,it is convience for you to match the other audio equipments,you can adjust the voice by switching the interface.(For example,the different interface of the SABRE D18 can represent two kinds of different style of the voice.)
For the high current Class A amplifier,the thermal design are also the emphasis.The thermal design identified with the shell design,actually the whole aluminium alloy shell whose thickness is up to 6mm is a large radiator, because of this,in the high current Class A working state,the size of the machine can be more smaller.The radiator of the voltage-regulator tube is produced by CNC milling,the heat can be spilled out from the convection hole in the shell immediately,so the inner circuit can keep the best working state.
With the help of high-precision instruments and years of experience of relative product research on headphone,Yulong Audio finished the design of circuit details of the SABRE A18. Perfect and high-performance circuit that uses the discret components, and the Manual paired transistor can keep the SABRE A18 with the noble temperament.
The sense of hearing of the SABRE A18 is based on the high-quality performance. Yulong Audio gives full play to the power of the tuning team to tune repeatedly. To get the best result, Yulong Audio adjusts the working state of each transistor precisely to fulfill the harshest audio Audiophiles.
The sound of the SABRE A18:rich and elegant,gentle and exquisite,the high-resolution expression of details,widely dynamic bursting sense of immediacy,it can fully play the music with different styles. The output impedance is low and the sense of music is rich,it can be matched with lots of the headphones.
Practical Performance:
●SNR:>110dB
●THD+N: 0.001%
●Frequency response:20-20KHz-0.1dB
●output power: 680欧：95mw 300欧：200mw 150R：400mw 32R：1.8W
●Power Consumption: <30W.
●Dimensions: 250*180*55mm.
● Weight: 3Kg.
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发表于 2012-3-22 09:46
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