Audio Research SP20 Guida Utente

User GuideH I G H D E F I N I T I O N®SP20Stereo Preamplifier

10OperationFront Panel ControlsThe SP20 has two microprocessor-driven rotary controls and three buttons (Power, Mute and Speaker Off).Left Rotary cont

11Remote Control only FunctionsInput Buttons: Allows direct selection of each of the 7 inputs of the SP20.Please note that input SE4 is user-selectabl

12Interactive Touch Screen OperationThe SP20 has been designed with a 4.3” interactive touch screen for reliable and easy usage. The interface is pr

13OperationVolumeThe large green number in the top right corner shows the master volume. The volume range is from 0-103. Set volume levels can be prog

14OperationOutput SelectionIndicates the active output of the preamplier. The preamplier can be selected to send signal to the main output or the he

15Settings MenuOperationor

16OperationSettings MenuThe features of the settings menu allow you to control certain parameters as well as customize aspects of the SP20. The follow

17Operationtheater processor. To engage the PROC mode, simply touch the label. A red ‘Conrm’ button will appear beneath the PROC mode button; touch i

18TroubleshootingIt is possible for a static discharge to temporarily disable the microprocessor that allows the controls to function. If this should

19MaintenanceServicingCAUTION: Your SP20 contains sufcient levels of voltage and current to be lethal. Do not tamper with a component or part inside

2ContentsPreface 3Illustrations 4Warnings 5InstallationInstallation of Vacuum Tubes 6In Your System 7Connections 8OperationPower-Up Proced

20Limited WarrantyAudio Research Corporation products are covered by a 3-Year Limited Warranty, or a 90-Day Limited Warranty (vacuum tubes).

21SpecicationsFrequency 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

Specications subject to change without notice.©2013 Audio Research Corporation.www.audioresearch.comH I G H D E F I N I T I O N®

3Thank you for selecting the SP20 as part of your music listening system. The engineers and designers at Audio Research have spent countless hours of

4Front PanelVOLUMEPOWERMUTESOURCEPHONESSP20 VACUUM TUBE STEREO PREAMPLIFIER HIGH DEFINITION®SPKR OFFWARNINGTO PREVENT FIRE AND SHOCK HAZARD, DO NOTEX

5WarningsTo prevent re, or shock hazard, do not expose your SP20 to rain or moisture. Do not place containers with liquid on top of unit

6InstallationInstallation of Vacuum TubesBefore operating the SP20...This unit has been shipped with the vacuum tubes installed in protective foam in

7InstallationIn your SystemWhile the SP20 does not dissipate an unusual amount of heat, it is important that it be provided with reasonable air

8ConnectionsAnalog ConnectionsInput Connectors: The SP20 provides ve pairs of single-ended input connectors: SE1 - 4, PHONO and MONITOR. Please

9OperationPower-Up Procedure• Secure all rear-panel connections between SP20, power amplier(s) and input sources.• Plug three-prong power cord from