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  • 产品名称: LM-503PA 单声道后级功率放大器

产品特点:
●纯手工制作,整机采用单支铜搭棚焊接
●采用具有高档特殊工艺和优质宽频响高品质的EI型单端输出变压器
●使用1只大功率环型电源变压器
●前级使用本公司设计开发的310A真空管,推动级使用300B
●后级使用1只845真空管做A类单端功率放大
●功率管电流调旋钮及电流显示表头
●输入端有音平衡变压器输入和RCA输入选择
●开机高压延时
●设置大环路负反馈和小环路负反馈,以适应不同的听音要求
●方便安装的拔插式真空管防护罩
●声音柔软、纯正和圆滑,适合欣赏各种音乐类型。

 

 

技术参数:
-额定输出功率:24W(单端甲类工作状态)
-谐波失真:1%(1kHz)
-整机频响:15Hz~35kHz(-1.5dB)
-信噪比:87dB
-输入阻抗:100kΩ
-输出阻抗:4Ω,8Ω,16Ω
-输入灵敏度:1000 mV
-使用真空管:310A×1、300B×1、845×1、5U3C×1
-整机体积(W×D×H):(287X574X279)MM3
-净重:32kg
-整机消耗功率:290W
-工作条件:温度:0℃~40℃    湿度:20%~80%
-储存条件:温度:-20℃~70℃    湿度:20%~90%
 
 
Product features:
●Hand-made, the whole machine adopts single copper welding booths
●Using high-grade special craft and high quality wide range of EI type single-ended output transformer
●Use 1 only power ring type power transformers
●Level before using the company design and development of 310A vacuum tubes,
promote use 300B level
●After using 1 only 845 vacuum tubes do class A single-ended power amplifier
●Power tube current tuning knob and current display meter
●The input has sound balance transformer input and RCA input selection
●On high voltage delay
●Set up big negative feedback loop and small loop negative feedback, to adapt to the
different requirements of listening
●Convenient installation drawing plug-in valve cap
●Voice is soft, pure and smooth, suitable for appreciation of various types of music.

 

Specification:
-Power output: 24W (Single-ended class a working condition)
-THD: 1%(1kHZ)
-Frequency response: 15 hz ~ 35 kHZ (1.5 dB)
-S/N Ratio: 87db
-Input Impedance: 100kΩ
-Output Impedance: 4 Ω, 8 Ω, 16 Ω
-Input Sensitivity: 1000 mV
-Input Sensitivity: 310Ax1、300B x1、845 x 1、5U3C x1
-Dimension (W x D x H) : (287 x 574 x 279) mm3
-Net weight: 32kg
-Power Consumption: 290w
-Working conditions: temperature: 0 ℃ to 40 ℃ Moisture: 20% ~ 80%
-Storage conditions: temperature: - 20 ℃ ~ 70 ℃ Moisture: 20% ~ 90%