You are buying an used but in great condition Audio Research LS-22 Line Stage Amplifier audiophile Tube Pre Amplifier The condition is used, it shows some cosmetic scratches on the corners as you see in pictures, however it’s in great working order has been tested. Description of Controls GAIN CONTROL: Use it to control volume. Rotation to the left attenuates gain, rotation to the right increases gain. INPUT SELECTOR: Detents indicate selection of various source material options: Tuner for AM/FM radio tuners; Video for audio input from HiFi videotapes, discs or broadcasts; Phono for phono preamplifiers: CD for compact disc players or digi-tal-to-analog processors; Aux for any additional high level source - tape, tuner, CD, video, etc. The signal source chosen by the input selector is fed to the Tape outputs. NOTE: See Monitor/Source for primary tape recorder selection. POWER SWITCH: Supplies power from AC wall outlet to LS22 when in Power position. Although not strictly necessary, it is nonetheless good practice to put the LS22 in Mute before turning on power for maximum protection of your power amplifier(s) and speakers. NOTE: “The phone option “ is for phono preamplifiers only A copy of manual is included ( not original manual) New tubes GENALEC made in Russia are installed Specifications Model LS22 FREQUENCY RESPONSE: .5dB, 1.5Hz to 100kHz -3B points below 0.1Hz and above 400kHz. DISTORTION: Less than .010% at 2V RMS output. GAIN: Main output: 18.3dB Bal., 12.7dB Unbal. Tape output: OdB. INPUT IMPEDANCE: 200K ohms Balanced, 100K ohms Unbalanced, Inputs (6): tuner, video, phono, CD, aux, tape (XLR and RCA connectors). OUTPUT IMPEDANCE: 400 ohms Balanced, 200 ohms Unbalanced main (2), 20K ohms minimum load and 2000F maximum capacitance. Outputs (3): 2 main, 1 tape (XLR and RCA connectors). MAXIMUM INPUT: 20V maximum. RATED OUTPUTS: 2V RMS 1Hz to 100kHz into 100K ohm balanced load (maximum balanced output capability is 35V RMS at less than 0.5% THD at 1kHz) CONTROLS: Gain, Input selector. Toggle switches: Power/Off, Unbalanced/Balanced input, Monitor/ Source, Mute/Operate. POWER SUPPLIES: Electronically-regulated low and high voltage supplies. Automatic 45 sec. warm-up/brown-out mute. Line regulation better than .01%. NOISE: 12uV RMS residual IHF weighted balanced noise output with gain control minimum, (104dB below 2V RMS output). TUBE COMPLEMENT: 8-6922/E88cc dual triode. (Vacuum tube audio circuit, solid-state power supply) POWER REQUIREMENTS: 100-135VAC 60Hz (200- 270VAC 50/60Hz) 90 watts maximum DIMENSIONS: 19 (48 cm) W x 514 (13.4 cm) H (standard rack panel) x 11/4 (29.8 cm) D. Handles extend 1½/2 (3.8 cm) forward of the front panel. Rear chassis fittings extend ?8 (2.3 cm). WEIGHT: 17 Ibs. (7.7 kg) Net; 27 lbs. Pictures are part of the description so please see them carefully and make your own conclusion about the item’s WHAT YOU SEE IS WHAT YOU GET Thanks for looking selling as the pictures shown. ABOUT SHIPPING Shipping Within US 48 Continental States Only ( not shipping to HAWAII , ALASKA , PUERTO RICO , VIRGIN ISLAND , PO BOX OR APO ADDRESS) will be shipped by Fedex UPS Or USPS Ground according your location with free tracking number and It will be shipped thru the address provided by eBay so please make sure it's right during checkout! Feel free to any questions. For International buyer we will use eBay Global shipping option no exceptions. ABOUT RETURN Please contact seller if you have any inconvenience with your item, before open an eBay case or leave a negative feedback (There are many ways to solve any issue) Is very important for Us make our costumers happy’s. Buy with confidence ?????TOP SELLER ????? • See other items in our eBay page!!! https://www.ebay.com/str/jarvingracestore