Sanders Sound Systems Phonostage Pre Amp Owners manual

Sanders Sound Systems

Phono Preamplifier

OWNERS MANUAL

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Table of Contents

INSTALLATION ................................................................................................................................................... 1

SET UP ................................................................................................................................................... 1

LOCATION ............................................................................................................................................ 2

INPUT CONNECTIONS ................................................................................................................... 3

OUTPUT CONNECTIONS ............................................................................................................... 3

POWER CONNECTIONS ................................................................................................................ 3

ELECTRICAL PROTECTION ......................................................................................................... 3

CARE AND CLEANING ..................................................................................................................................... 4

DESIGN PHILOSOPHY ...................................................................................................................................... 5

PARTS QUALITY ............................................................................................................................... 6

SPECIFICATIONS ................................................................................................................................................ 7

CIRCUIT SPECIFICATIONS ........................................................................................................... 7

POWER SUPPLY ................................................................................................................................ 7

DIMENSIONS ...................................................................................................................................... 7

WARRANTY .......................................................................................................................................................... 8

Front Edge of Circuit Board

! WARNING ! Never make any internal adjustments while this unit is selected as

the input source on your line-level preamp.

Throwing an internal switch while the unit is on will produce a loud transient that can damage a speaker.
So be absolutely sure that the Phono Preamp is not selected on your main preamp when making any
internal adjustments.

INSTALLATION

SET UP

Prior to installing the unit, you may select balanced or unbalanced inputs as well as set gain and input loading

(both resistance and capacitance) for each channel. The default input is “Unbalanced” and the default gain is
“Low”, such as would be used with a high output, moving-coil or moving-magnet cartridge. The “high” setting

will provide an additional 20 dB of gain, if necessary, for lower output, moving-coil cartridges. There is also a
built-in “head amp” for use with ultra-low output, moving coil cartridges that can be switched in if even more
gain is needed.

Settings are altered inside the unit. To do so, first unplug the unit and remove the cover using the supplied
Allen key. Use care to avoid scratching the anodized finish. Inside you will see a large circuit board with several
switches. A simplified view of the circuit board layout is shown below. There are a pair of grey/red slide
switches near the RCA input connectors. Slide them as shown in the drawing to select balanced or unbalanced
input. Similar switches near the middle of the board add 20 dB of gain for each channel. If more gain is needed,
switch in the head amp by throwing all four switches on the head amp board as shown on the left of the
drawing.

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