本文的主角是这台名为Whammerdyne Truth的2A3单端立体声功放,有一个多功能的系统状态表,可实时显示灯管电流。采用了一种独特的音频信号路径电路,选择A或D可监控2A3管电流情况,选择B或C可看6DJ8管电流。
选择的6DJ8/6922电子管使用寿命可达3000~4000小时,独立纯直流灯丝电源运行。而2A3电子管则是设计方认为声音最好的一支管,每个2A3具有独立的纯直流灯丝电源(超低噪音)。
左右声道、变压器全隔离,可优异地控制噪声。4ohm,通常,8ohm输出(左右声道)。整机组件包括1支6DJ8输入电子管,2支2A3输出管,及JJ 2A3-40 6DJ8 6922 7308 CCa E88CC E188CC等兼容管。一个定制的Simpson电流表(L/R偏压2A3,L/R偏压6DJ8)。
经12小时热机后的测试指标(All measurements taken after 1/2 hour warm up time):
Power Output
Power output, both channels driven at 5% distortion: 4.75 watts
Peak power output: 6.5 watts per channel
Frequency Response:1 Wrms - 3 dB down @ 6 Hz and 140 kHz (wideband)
Wideband signal to noise ratio at 1 kHz, just below clipping: 90 dB
Inputs
L/R pair RCA audio inputs
Input sensitivity (for full power):1.7 Vrms
Input Impedance at 20 Hz: 30 K Ohms
Outputs
L/R speaker connection terminals
Output Impedance:Common, 4 Ohm, 8 Ohm
Dimensions:11.8" W x 18" H x 18" D,69 Lbs weight
Power Consumption:120VAC, 60 Hz line voltage: 111 watts 1.2 A
Wideband hum and noise:Input shorted, output into 8 ohm load,<25 µV left and right channel
Distortion vs Frequency at 1 Watt:1 kHz = 1.5 % T.H.D
Gain:22 dB
Gain match left and right channels:Better than .3 dB, full band sweep
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