preamp - My HIFI - 二手音響，喇叭，各類影音 (官方網站)

Audio Research LS1

膽前級, 雙output<br>6DJ8 x1,<br>操作正常, 歡迎試音, 試完唔啱唔緊要<br>尺寸: 闊48, 高15, 深30cm<br><br>Frequency response ± .5dB, 5 Hz to 50 kHz<br>Distortion (THD) < .01%<br>Noise & hum 100 dB below 1V RMS output<br>Gain Direct input to main output: 21 dB.<br>CD input to main output: 11 dB.<br>High level inputs to tape output: 0dB.<br>Input impedance 50K ohms (150K ohms CD, 100K ohms Direct).<br>Output impedance 250 ohms main output. Recommended load 60K ohms and 100pF. (20K ohms minimum and 1000pF maximum).<br>Output polarity<br>Maximum inputs 20V<br>Rated outputs 2V RMS 5Hz to 50Hz, all outputs, 60K ohm load (main output capability is 50V RMS output at 1/2% THD at 1kHz into a 100K ohm load with 5V RMS input).<br>Power supplies Electronically-regulated low and high voltage supplies. Shielded toroid tranformer. Line regulation better than .01%.<br>Tube complement (1) 6922<br>Dimensions 19” (48 cm) W x 5 1/4” (13.4 cm) H (standard rack panel) x 10 1” (26 cm) D. Handles extend 1 1” (3.8 cm) forward of the front panel. Rear chassis fittings extend 7/8” (2.3 cm).<br>Weight 20 lbs.<br><br>MY HIFI Company<br>電話/ whatsapp: 63231067 <br>cash/ visa/ master/ payme/ fps<br>收購二手音響, 代客寄賣, 交換, 送貨服務

Goldmund MM SR PRE 前級 (100v)