Audio Research LS 2 pre linea

Preamplificatore valvolare linea Audio Research LS 22

Frequency response: ±.5dB, 1.5Hz to 100kHz. -3dB points below 0.1Hz and above 400kHz.
Distortion (THD): Less than .010% at 2V RMS output.
Noise & hum: 12µV RMS IHF weighted balalanced noise (104dB below 2V RMS output)
Gain: Main output: 18.3dB Bal., 12.7dB Unbal. Tape output: 0dB.
Input impedance: 200K ohms balanced, 100K ohms unbalanced
Output impedance: 400 ohms balanced, 200 ohms unbalanced main (2), 20K ohms minimum load and 2000pF maximum capacitance.
Maximum inputs: 20V maximum

Rated outputs: 2V RMS 1Hz to 100kHz into 100 Ohm balanced (maximum balanced output capability is 35V RMS at less than 0.5% THD at 1kHz)
Power supplies: Electronically-regulated low and high voltage supplies.Automatic 45 sec. warm-up/brown-out mute. Line regulation better than .01%.
Tube complement: (8) 6922/E88CC
Power requirements: 100-135VAC 60Hz (200-270VAC 50/60Hz) 90 watts maximum.
Other Vacuum tube audio circuit, solid-state power supply. Inputs (6): tuner, video, phono, CD, aux tape (XLR and RCA connectors). Outputs (3): 2 main, 1 tape (XLR and RCA connectors).

Dimensions 19" (48 cm) W x 5¼" (13.4 cm) H (standard rack panel) x 11¾" (29.8 cm) D. Handles extend 1½" (3.8 cm) forward of the front panel. Rear chassis fittings extend ⅞" (2.3 cm).
Weight: 17 lbs. (7.7 kg) Net; 27 lbs. (12.3 kg) Shipping.