gsg168 在 2006-12-12 9:47:32 发表的内容
前级可能是这个，感觉象menn的产品。看这里：http://www.yhwr.cn/bbs/dispbbs.asp?boardID=10&ID=278&page=1 |
看来群众的眼睛还是雪亮的！此前级就是“传说”中的David & MENN Lab. - RTP4B。
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PRA2/RTP4B ——
FREQUENCY RESPONSE（频率响应）: +/- 0.5DB, 5.0Hz to 150kHz; -3dB points below 1.0Hz and 400kHz.
DISTORTION（失真）: less then .03% at 2V RMS output.
GAIN（增益）: Main Output（主输出） 15dB at SE and balanced
INPUT IMPEDANCE（输入阻抗）: 100K ohms Balanced（全平衡时）, 50K ohms SE（非平衡时）. Inputs (XLR and RCA connectors).
OUTPUT IMPEDANCE（输出阻抗）: 320 ohms Balanced（全平衡时）, 160 ohms SE Main (2)（非平衡时）, 20K ohms minimum load and 2000pF maximum capacitance. Outputs (XLR and RCA connectors)（功率放大器输入阻抗不低于20K ohms以及容抗不超过2000pF时）.
MAXIMUM INPUT（输入信号电压）: 10V maximum BAL（最大十伏）, 5V maximum SE（最大五伏）.
RATED OUTPUTS（持续可输出电压）: 2V RMS 1Hz to 150kHz into 100K ohm balanced load (maximum balanced output capability is 40V RMS at less than 0.5% THD at 1kHz).
CONTROLS（操控）: Volume（音量）, Input Select with Mute/Operate（输入选择及静音）, Power On/Off（电源开关）., Remote Control（除电源开关外可遥控操作）.
POWER SUPPLIES（电源供应）: Electronically-regulated low and high voltage supplies（电子稳压）. Automatic 45sec.warm-up/brown-out mute（开机45秒延时控制）. Line regulation better than .01%（线路工作电压变动少于0.01%）.
NOISE（噪音）: 25uV RMS residual IHF weighted balanced noise output with gain control at minimum (98dB below 2V RMS output).
TUBE COMPLEMENT（使用胆管）: (4)-6922 dual triode. (Vacuum tube and FET audio circuit, solid state power supply.)
INPUT: 3 x SE(RCA), 1x BALANCE(XLR): XLR (1G, 2+, 3-)
OUTPUT: 1x SE(RCA), 1x BALANCE(XLR): XLR (1G, 2+, 3-)
POWER REQUIREMENTS（适应电压、功率）: 220-240VAC 50Hz 45 watts maximum.
DIMENSIONS（尺寸）: 17" (43 cm) W x 4.33" (11 cm) H x 13.75" (35 cm) D
WEIGHT（重量）: 19.75 lbs. (9 kg) Net; 28 lbs. (12.7 kg) Shipping.
Specifications subject to change without notice（规格变化恕不另行通知）.
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