Audio Research LS17 Hybrid JFET/tube stereo line stage with remote control

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Frequency response +0-3dB, 0.5Hz to 160kHz at rated output (Balanced, 200k ohms load)
Distortion (THD) Less than .01% at 2V RMS BAL output.
Noise & hum LS17: 2.2uV RMS residual IHF weighted balanced equivalent input noise with volume at 1 (101 dB below 2V RMS output).
LS17SE: 1.7uV RMS residual IHF weighted balanced equivalent input noise with volume at 1 (109dB below 2V RMS output.)
Gain LS17: Main output: 18dB Balanced output (12dB SE output).
LS17SE: Main output: 12dB Balanced output (6dB SE output).
  Record output: 0dB (Processor input: 0dB SE).
Input impedance 120K ohms Balanced, 60K ohms SE.
Output impedance LS17: 700 ohms Balanced, 350 ohms SE Main.
LS17SE: 600 ohms Balanced, 300 ohms SE Main.
20K ohms minimum load and 2000pF maximum capacitance.
Output polarity Non-inverting.
Maximum inputs LS17: 24V RMS BAL.
  LS17: 12V RMS SE.
Rated outputs LS17: 2V RMS 1Hz to 100kHz into 200K ohm balanced load (maximum balanced output capability is 15V RMS at less than 0.5% THD at 1kHz)
LS17SE: 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).
Power supplies Electronically regulated low and high voltage supplies. Line regulation better than .01%.
LS17: Automatic 50 sec. warm-up/brown-out mute.
LS17SE: Automatic 40 sec. warm-up/brown-out mute.
Tube complement (2) 6H30 dual triode. (Hybrid JFET/tube audio circuit, solid-state power supply).
Power requirements LS17: 105-130VAC 60Hz (210-260VAC 50/60Hz) 50 watts maximum.
LS17SE: 100-135VAC 60Hz (200-270VAC 50/60Hz) 130 watts. Standby: 2 watts.
Other Rotary volume selector (104 steps, 20 LED indicators) and rotary input selector.
Push buttons: Power, Monitor, Proc, Mute. Also remote buttons: Bal 1, Bal 2, Aux, Tuner, CD.
Dimensions LS17: 19" (48 cm) W x 5.25"(13.4 cm) H (standard rack panel) x 12"(30.5 cm) D.
LS17SE: 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 LS17: 13 lbs. (5.9 kg) Net; 23 lbs. (11.5 kg) Shipping.
LS17SE: 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.

With the REF3 redefining what is possible in ultimate preamplifier performance and the LS26 creating a new performance benchmark in a slightly smaller package, we are very proud to introduce the LS17, a new preamplifier offering much of their performance and musicality in a more affordable package.

The new LS17 retains the strong feature set of the previous LS16 series, offering two balanced and five single-ended inputs, and two balanced and one single-ended output. A monitor input and record output are also provided.

On the front panel, the changes are more obvious. A new linear LED display provides a 20-lamp display for the 104-step volume control, as well as indicators for selected input and muting. One rotary control is provided for volume adjustment, while a second controls input select. Pushbuttons are provided for power, monitor, processor (unity gain) and mute. All functions are also accessible via the included handheld remote. For systems using a master controller, all LS17 functions are individually addressable by discrete codes. Handles are included as part of the standard LS17 package.

But it is in the LS17's remarkable new level of performance that you will experience the biggest difference from its predecessor. Using two 6H30 twin triodes in the audio stage, the LS17 has a larger power transformer, redesigned power supply and new parts including proprietary output coupling caps. This gives the LS17 the stunning purity of sound first heard in the REF3 and in the more recent LS26. The family resemblance is undeniable, and convincing. The LS17 has an easy flow to its presentation, but it resolves musical and spatial information at a much higher level than the LS16 series was ever capable of. Instrument focus, soundstage clarity and bass definition are all vividly enhanced. Members of our listening panel agree that if the LS26 is the "REF3 Jr.," then the LS17 is surely the "Baby REF3." The pedigree is only too clear, and you will hear it immediately and without effort.

With the introduction of the LS17, Audio Research now offers benchmarks in preamplifier quality, performance and value at three distinct price points. Our lineup has never been stronger. Hear for yourself how an LS17 can transform your system and make music much more enjoyable.


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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