Audio Research SP17 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: Line: +0-1dB, 0.6Hz to 80kHz at rated output. -3dB points below 0.3Hz and above 120KHz.

Phono: +/-0.3dB of RIAA, 10 Hz to 20KHz

DISTORTION: Less than .005% at 2V RMS output.

GAIN: Main output line: 11.1dB Processor: 0dB.

Phono: 58dB at 1 KHz.

Record output, line: 0dB. Phono: 47dB.

INPUT IMPEDANCE: 60K ohms line, 47K ohms Phono, (0.7 to 7mV High output cartridge recommended).

Inputs (6): phono, CD, tuner, video, aux, processor. Model SP17L has no phono input.

OUTPUT IMPEDANCE: 210 ohms Single Ended main; 20K ohms minimum load and 1000 pF maximum capacitance.

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

The Audio Research SP17 features low-noise JFET inputs in both the line- and phono-stages, and instead of 12AX7s you will find a 6H30 in each section – all of our preamplifiers now employ this high performance long-life tube. The same high-voltage regulator found in the LS17 and LS26 is now utilized in the  Audio Research SP17, and so is the same 103-step volume control – the SP16's control had only 70 steps; adjustment of the volume is much finer now, which is especially useful at low volume settings. The maximum input is 9 volts RMS, versus a maximum of only 3.5 volts RMS before overload in the SP16. The Audio Research SP17 features direct access codes and discrete On-Off commands for power and mute functions for incorporation in a system with a master controller. And, like all of our other preamplifiers, the Audio Research SP17 is pure Class-A. The line-only SP17L is also available without the phono stage installed.

Bandwidth has increased, with -3dB points below 0.3Hz to above 120KHz. Output impedance has been lowered, improving the Audio Rsearch SP17's ability to drive long cables and low impedance amplifiers. Gain in the line section has been reduced very slightly, from 11.5 to 11.1dB, but it has been increased in the phono section from 43.5dB to 47dB. The SP17 is 2dB quieter in its line section and is 9dB quieter in its phono section, making it an astonishing 11dB quieter overall. Now it is much easier to use a phono cartridge with an output below 1mV without incurring noise.

What do all of these changes translate to musically? Greater articulation, better image focus and an apparent speed resulting from lower distortion and a lack of smearing. Bass definition and control are improved, and dynamics simply pop. And because it is so quiet, the music stands out in bold relief against a black background. Individually, each of these attributes is easily identified and meaningful, but combining them in the SP17 provides one with the same type of magic offered by our costlier line-stages.

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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