Audio Research LS8 MKII Tube stereo line stage

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Frequency response±.5dB, 0.5Hz to 100kHz -3dB points 0.1Hz and 250kHzDistortion (THD)Less then .01% at 2V RMS output (typically .007% in midband)Noise & hum20µV RMS IHF weighted noise at main output with gain control at -60dB (100dB below 2V RMS output)GainMain Output - 12.2dB unbalancedTape output - 0dBInput impedance50K ohmsOutput impedance200 ohms main output. Recommended load 60K ohms and 100pF (20K ohms minimum and 1000pF maximum)Output polarityNon-invertingMaximum inputs3.5V maximumRated outputs Power suppliesElectronically-regulated low and high voltage supplies. Line regulation better than .01%Tube complementLS8: (4) 6922 LS8 MKII: (4) 6922/E88CC dual triodePower requirements100-135VAC 60Hz (200-270VAC 50/60Hz) 30 watts maximumOtherControls: Gain (64 step, 0.5dB per step for 40 steps), Input selector. Toggle switches: Power On/Off, Mute/Operate.Dimensions19" (48 cm) W x 5 1/4" (13.4 cm) H (standard rack panel) x 10 1/4" (26 cm) D Handles extend 1 1/2 " (3.8 cm)forward of front panel. Rear chassis fitting extend 1/2" (1.3 cm).Weight10 lbs. (4.5 kg) Net; 19 lbs. (8.6 kg) Shipping.

This item cannot be ordered online. If you are interested please click on the Ask a Question button below.

The LS8 is ideal for those who demand true musicality and essential control functions in a vacuum-tube stereo preamplifier with no compromise in mechanical integrity or parts quality. While the LS8 is the most affordable preamp in the Audio Research line, its remarkable sonic performance cuts no corners when measured against the competition.

The LS8 is beautifully simple: single-ended inputs and outputs, rotary volume control and input selector, and power-on and muting-function toggle switches. The volume control is a 64-step microprocessor-controlled device with impressive sonic transparency and smooth, continuous rotary action. 40 steps in this control are .5 dB increments, offering precise control and tracking.

Inside, the LS8 features an all-tube gain circuit providing 12 dB overall gain from four 6922 twin triodes. Electronically regulated low- and high-voltage power supplies insure consistently excellent musical dynamics under the most dynamic conditions, while costly Inficap coupling capacitors at the output preserve maximum sonic transparency. Input impedance is 50 K ohms. RCA-type inputs and outputs are rugged, gold-plated connectors selected for best sonics.

Five inputs (Tape, Tuner, CD, Video, Aux) and two main outputs are provided. A.C. power is supplied via an IEC three-pin socket and heavy 14-gauge detachable cord. Remote control is not available with the LS8. Three front-panel finishes are available at no extra cost: anodized natural, black or dark gray.

Sonically, the LS8 offers system resolution never before available at anywhere near its price. Source material is reproduced with remarkable fullness, transparency and vivid soundstage focus. Musical dynamics, bass extension and definition are clearly superior to any previous Audio Research model in this price category.

We endeavour to despatch same day for orders placed up to 2pm on available stock items (items with stock message "Usually dispatched within 24 hours"). Please remember to check with us first for a physical stock check if next day delivery is important to you. Any items with stock message "Usually dispatched within 72 hours" are items that we do not hold in stock but order in from the importer or manufacturer as soon as a customer order is recieved. Occasionally these may be delayed beyond 72 hours due to importer/manufacturer stock levels but we will inform you as soon as we can if this is the case.

UK ORDERS:  We despatch the bulk of our UK mainland items on a 24 hour service – Free of Charge.  Non Mainland locations - Isle of Man, Isle of Wight, the Scilly Isles, the Scottish highlands and Islands, the Channel Islands and Northern Ireland may take a day or so longer and are not Free of Charge. Smaller items are delivered using Royal Mail recorded delivery or special delivery. Larger items are delivered using a courier service such as Interlink Express, DPD, UPS or DHL. 

INTERNATIONAL ORDERS: We offer competitive rates which can be confirmed by email. Please just ask – we will need a full delivery address and telephone number. Smaller items are delivered using Royal Mail Small Packets Airmail with International Tracked and/or Signed depending on value of item and availability of the service. Larger International shipments are sent by insured and tracked services using DPD, DHL or UPS. If there are any delays due to specific customs regulations, etc, you will be contacted by Turntableworld or by the courier with a request for any further information required. Customs duties do not apply for shipments into any EU country (for a full list please refer to the EU Country List). Customs duties can apply for countries outside of the EU. Customers in these countries are responsible for all taxes and duties incurred when the items enter their country.

COLLECT IN STORE OR HOME INSTALL:At the request of the manufacturer some items cannot be supplied by mail order but you can click and buy them and then elect to collect them from our store or arrange a home install (if applicable). Applicable items clearly state that they are Collect in store or home install. Once ordered you will receive a message prompting you to contact us by phone or email to arrange for us to deliver and install or to reserve and collect from our store at your convenience, you will also be advised of the delivery time / stock availability as not all Home install / collect in store items are held in stock. 

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