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LS28 真空管前级放大器

频率向应: +0-3dB, 0.4Hz to 200kHz at rated output (Balanced, 200k ohms load)
总谐波失真: Less than .007% at 2V RMS BAL output.
噪音: Less than -100dBv at max volume (103).
动态范围: 122dB (AES17).
串音: -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).
最高输入: 16V RMS BAL, 8V RMS SE.
额定输出: 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).
操控: Rotary volume selector (103 steps) and rotary input selector. Push buttons: Power, Menu, Enter, Mono, Invert, Mute
电源供应: Electronically regulated low and high voltage supplies. Automatic 45 sec. warm-up/brown-out mute. Line regulation better than .01%.
真空管:(4) 6H30P dual triode.
电压需求: 105-125VAC 60Hz (200-250VAC 50/60Hz) 130 watts maximum.
待机耗电: 2W

商品介紹

LS28前级放大器是灵活和直观的前置放大器。在LS28的心脏都在仿真电路4支6H30真空管。4组平衡和4组单端输入,两组平衡和单端输出。特别设计的简单菜单;允许许多参数,包括输入命名,真空管工作时计,自动关机,和家庭影院直通的控制权。相位互转等标准的功能。而LS28为任何Audio Research功放的绝配,它的设计能与几乎可匹配所有目前市场上的放大器。

Audio Research的目标是追求『High Definition』的音乐回放,亦是Audio Research的金漆招牌标记。ARC坚持的信念,就是「以合理的价格提供高质量的音乐回放」,并与时并进推出切合时代的高质量真空管音响产品。

继REF 6真空管前级扩大机 和 Ref Phono3真空管唱头放大机推出后,ARC参照获奖无数的Reference Series参考系列的各项技术优点及承传ARC招牌音色,推出全新系列Foundation Series根基系列包括:
LS 28真空管前级, DAC 9数码/模拟译码器 和PH 9真空管唱头放大机