音响评析
50周年纪念再一弹: ARC Audio Research LS28SE前级特别版
2020/6/12 10:02:15
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为了庆祝成立50周年，美国管机大厂陆续发表限定特别产品，本次发表的是经典的LS28前级SE=Special Edition特别版本。LS28SE为一台使用弹性高且相当直觉设计的前级，具有4组平衡XLR与4组RCA输入，2组平衡XLR与2组RCA输出，提供最大的连接可能，智慧先进的选单很容易就可以对各项参数进行设定，包括输入名称、真空管使用时数、自动关机、剧院Bybass、相位与单声道模式等等。
LS28SE前级的类比线路使用了4隻6H30真空管，其线路设计可与自家的后级做最完美的搭配，也可以搭配其他厂牌的后级使用。LS28SE的提升来自于自家参考级160扩大机的系列，与REF6SE、REF PH3SE的线材、元件都非常类似，包括了专有的金版藕合电容(gold coupling caps)，这些升级让LS28SE的声音达到新的境界。
Audio Research LS28SE前级特别版
● 频率响应: +0-3dB, 0.4Hz to 200kHz at rated output (Balanced, 200k ohms load)
● 总谐波失真<.007% at 2V RMS BAL output
● 噪讯 <-100dBv at max volume (103)
● 动态范围: 122dB (AES17)
● 串扰: -105dB
● 增益:
Main output: 18.5dB balanced output. (12.5dB SE output.)
Record output: 0dB (Processor input: 0dB balanced out).
● 输入阻抗: 100K ohms Balanced, 50K ohms SE. 8 Inputs – 4 balanced, 4 single-ended.
● 输出阻抗: 600 ohms Balanced, 300 ohms SE Main (2), 20K ohms minimum load and 2000pF maximum capacitance. Outputs (3): 2 Main, 1 Record (XLR and RCA connectors).
● 最大输入: 16V RMS BAL, 8V RMS SE.
● 输出: 2V RMS (1V RMS SE) into 200K ohm balanced load (maximum balanced output capability is 17V RMS at less than 0.5% THD at 1kHz).
● 待机消耗: 2W
● 尺寸: 48 x 13.7 x 34.8 cm
● 重量: 7.2Kg
● 频率响应: +0-3dB, 0.4Hz to 200kHz at rated output (Balanced, 200k ohms load)
● 总谐波失真<.007% at 2V RMS BAL output
● 噪讯 <-100dBv at max volume (103)
● 动态范围: 122dB (AES17)
● 串扰: -105dB
● 增益:
Main output: 18.5dB balanced output. (12.5dB SE output.)
Record output: 0dB (Processor input: 0dB balanced out).
● 输入阻抗: 100K ohms Balanced, 50K ohms SE. 8 Inputs – 4 balanced, 4 single-ended.
● 输出阻抗: 600 ohms Balanced, 300 ohms SE Main (2), 20K ohms minimum load and 2000pF maximum capacitance. Outputs (3): 2 Main, 1 Record (XLR and RCA connectors).
● 最大输入: 16V RMS BAL, 8V RMS SE.
● 输出: 2V RMS (1V RMS SE) into 200K ohm balanced load (maximum balanced output capability is 17V RMS at less than 0.5% THD at 1kHz).
● 待机消耗: 2W
● 尺寸: 48 x 13.7 x 34.8 cm
● 重量: 7.2Kg
Audio Research LS28SE, ARC LS28SE,ARC LS28SE前级特别版
