Audio Research LS17SE Stereo Valve Preamplifier

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

FREQUENCY RESPONSE: +0-3dB, 0.5Hz to 200kHz at rated output (Balanced, 200k ohms load).

DISTORTION:  Less than .01% at 2V RMS BAL output.

GAIN: Main output: 12dB Balanced output, 6dB SE output.  Tape output: 0dB (Processor input: 0dB SE output).

INPUT IMPEDANCE:  120K ohms Balanced, 60K ohms SE.  Inputs (7): CD, TUNER, VIDEO, PHONO, AUX 1, AUX 2, PROCESSOR.  (XLR and RCA connectors)

OUTPUT IMPEDANCE:  600 ohms Balanced, 300 ohms SE Main (2). 20K ohms minimum load and 2000pF maximum capacitance. Outputs (3): 2 main, 1 tape (XLR and RCA connectors).

OUTPUT POLARITY:  Non-inverting.


RATED OUTPUTS:  2V RMS (1V RMS SE) into 200K ohm balanced load (maximum balanced output capability is 30V RMS at less than 0.5% THD at 1kHz).

CROSSTALK:  -80dB or better at 1kHz and 10 kHz.

CONTROLS:  Volume (104 steps), Select Input.  Push Buttons:  Power, Proc, BAL/SE, Mono, Invert, Mute.

POWER SUPPLIES:  Electronically regulated low and high voltage supplies.  Automatic 40 sec. warm-up/brown-out mute.  Line regulation better than .01%.

NOISE:  1.7uV RMS residual IHF weighted balanced equivalent input noise with volume at 1 (109dB below 2V RMS output.)

TUBE COMPLEMENT:  2-6H30P dual triode, (Hybrid JFET/ tube audio circuit, solid-state power supply).

POWER REQUIREMENTS:  100-135VAC 60Hz (200-270VAC 50/60Hz) 130 watts.  Standby: 2 watts.

DIMENSIONS:  19" (48 cm) W x 7" (17.8 cm) H (standard panel) x 15.5" (39.4 cm) D.  Handles extend 1.5" (3.8 cm) forward of the front panel.

WEIGHT:  30.4 lbs. (13.9 kg) Net; 41.6 lbs. (19 kg) Shipping.

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

The LS17 SE maintains the same physical size as its predecessor.  The only cosmetic difference is the updated front panel which replaces the black plastic buttons with round metal buttons, complementing the symmetry of the two control knobs flanking the LED display.  The display shows volume as well as which input is selected.  Front panel controls include power, monitor, mute and processor (pass through).  All functions are also accessible via the included handheld remote, and discrete remote codes are available for programming universal-style controllers.  Handles finish the understated elegance of the overall appearance. Internally the LS17 SE builds on the architecture of the LS17 and adds SE upgrades to provide exceptional performance.  New Teflon coupling capacitors as well as other internal performance enhancements combine to create a preamplifier offering greater detail, spatial cues and dynamic breadth.  Two 6H30 twin triodes are at the heart of the Class A audio circuit.  A custom designed power transformer provides serious current delivery.  In concert, the components of the LS17 SE create a sound that will truly delight the listener – this is a preamplifier dedicated to delivering a great musical experience. The LS17 SE has seven inputs (including the processor input), two of which are balanced.  There are four outputs, record and main output 1 (both single-ended) and two balanced outputs.  There is also a 12 volt trigger for controlling the power of other system components.  The A.C. power input is a 15A connection.

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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