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Table of Contents
Related Manuals for Audio Research SP20
Summary of Contents for Audio Research SP20
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Page 1: User Guide
User Guide SP20 Stereo Preamplifier H I G H D E F I N I T I O N ®... -
Page 2: Table Of Contents
Contents Preface 3 Illustrations 4 Warnings 5 Installation Installation of Vacuum Tubes 6 In Your System 7 Connections 8 Operation Power-Up Procedure 9 Front Panel Controls 10 Remote Control Only Controls 11 Interactive Touch Screen Operation 12 - 17 Troubleshooting 18 Maintenance Servicing 19 Cleaning 19... -
Page 3: Preface
Preface Thank you for selecting the SP20 as part of your music listening system. The engineers and designers at Audio Research have spent countless hours of listening and testing to create a preamplifier of the highest caliber for music reproduction. The SP20 has been designed to provide you many years of playback. -
Page 4: Illustrations
Illustrations Front Panel SOURCE VOLUME SP20 VACUUM TUBE STEREO PREAMPLIFIER HIGH DEFINITION ® POWER MUTE PHONES SPKR OFF Back Panel MODEL SP20 RIGHT INPUTS RIGHT OUTPUTS IR INPUT STEREO PREAMPLIFIER PLYMOUTH, MINNESOTA MADE IN U.S.A. +12V REMOTE CAUTION TRIGGER (30mA max) -
Page 5: Warnings
Warnings To prevent fire, or shock hazard, do not expose your SP20 to rain or moisture. Do not place containers with liquid on top of unit. This unit contains voltages which can cause serious injury or death. Do not operate with cover removed. Refer servicing to your authorized Audio Research dealer or other qualified personnel. -
Page 6: Installation
Installation Installation of Vacuum Tubes Before operating the SP20... This unit has been shipped with the vacuum tubes installed in protective foam in a separate box packed inside the shipping carton. Remove the tubes carefully from the protective foam. Using a phillips-head screwdriver to loosen the fastening screws, remove the top cover and set aside. -
Page 7: In Your System
Do not stack components or other objects directly on top of the SP20. Do not place or operate your preamp on a soft or irregular surface such as a rug. -
Page 8: Connections
RS-232 Connection: The RS-232 connection allows for remote control via systems such as Creston or other automation systems. IR Input: The IR input can be used to link the SP20 to an IR repeater system with a standard mono 1/8” connector. -
Page 9: Operation
• Press power switch (either on the remote or front panel). The screen will begin the warm-up sequence, first displaying the Audio Research logo, followed by SP20 and a series of dots (fig. 1 + 2). The home screen will then appear, and the unit will be muted. Depress the front panel MUTE button (right button) or the Mute button on the remote to initiate normal operation. -
Page 10: Front Panel Controls
Operation Front Panel Controls SP20 has two microprocessor-driven rotary controls and three buttons (Power, Mute and Speaker Off). Left Rotary control (Input Select): Select input by rotating the control to the left or right. The screen displays the current input by factory-set and user-definable name at the top right. -
Page 11: Remote Control Only Controls
Operation Remote Control only Functions Input Buttons: Allows direct selection of each of the 7 inputs of the SP20. Please note that input SE4 is user-selectable to function as a unity gain (processor) input. When engaged and SE4 is selected, ‘Unity Gain’ will appear in the display and the volume control will be defeated. -
Page 12: Interactive Touch Screen Operation
The Home Screen The Home Screen provides the current status and operating functions of the SP20. Once you have set up the preamplifier, the Home Screen will be the most used interface for operating your system. Input Name The input currently in use is displayed in the top left corner. - Page 13 The large green number in the top right corner shows the master volume. The volume range is from 0-103. Set volume levels can be programmed so that when the SP20 is initially powered on, the volume is always at the same number. Likewise, individual set volumes for the speaker (main) outputs and headphone output can be set to prevent unexpected volumes while switching between outputs.
- Page 14 Settings The settings menu allows you to make function and visual adjustments to the SP20. Touching the settings icon will take you to the main settings menu where you can choose from a number of options to customize the performance of the preamplifier. Any time you are in the settings menu or one of its submenus, you can touch the ‘Home’...
- Page 15 Operation Settings Menu...
- Page 16 Input Label screen to change another input name. PROC Mode: Input SE4 can be set to unity gain in the event a component with a volume control will be connected to the SP20 such as a home...
- Page 17 ‘On’. System: The System submenu allows you to set volume presets for each of the two outputs of the SP20, check the software version, and set the unit back to factory defaults. Reset Defaults: To reset the SP20 to the original factory settings, touch the ‘Factory Defaults’...
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Page 18: Troubleshooting
A.C. receptacle for 60 seconds. Reconnect the A.C. plug and turn the preamp back on, along with other components. The controls should resume normal operation. If the problem persists, contact your dealer or Audio Research Customer Service at 763-577-9700. -
Page 19: Maintenance
Please contact your dealer or importing distributor for instructions on proper disposal of this product in your country. Or, contact Audio Research Corporation (763-577-9700) for the name of your importing distributor and how to contact them. -
Page 20: Limited Warranty
In the unlikely event that technical service beyond the ability of the importer is required, Audio Research will fulfill the terms and conditions of the Limited Warranty. Such product must be returned at the purchaser’s expense to... -
Page 21: Specifications
Specifications Frequency Response: Line: ± 0.3dB 2 Hz to 80 kHz; -3dB 0.8Hz to 220 kHz Phono: ± 0.1dB of RIAA 10Hz to 20kHz; ± 0.4dB 5Hz to 80kHz Headphone: ± 0.05dB 20Hz to 20kHz; -3dB 0.8Hz to 220kHz THD+N: Line: <... - Page 22 H I G H D E F I N I T I O N ® www.audioresearch.com Specifications subject to change without notice. ©2013 Audio Research Corporation.