Conrad-Johnson ET3 Preamplifier Owner’s Manual
Physical location and cable “dress” can be an important factor in
minimizing hum pickup. The installation should situate the pream-
plifier well away from the power amplifier, and power (ac mains)
cords should be dressed to remain at least 4" (100mm) away from
input/output cables.
Connection
SOURCES (TUNER, CD, VIDEO, TAPE): These high level inputs
are electrically equivalent. The load they present to the source
varies with the volume control setting, but in no case will it drop
below 25 kOhms. Connect the corresponding source components
to these inputs.
AUX1/PH: If the optional phono stage is installed (see below), this
input provides the extra gain and RIAA equalization required for
playback of LPs. Otherwise, this serves as an additional line-level
input.
EPL: This set of line-level inputs and outputs provides for
connection of an external signal processor (e.g. parametric
equalizer, tone controls) or a tape recorder. Connect the EPL OUT
to the input of your signal processor or tape recorder, and the EPL
IN to the output of your processor or tape recorder. Alternatively,
the EPL IN connection can be used as an additional line level
input.
THEATER: This is an external processor loop designed to
conveniently accommodate the addition of a surround-sound
processor (SSP) to a high-quality two-channel system without
compromising two-channel performance. Connect the front left and
front right channel outputs from your SSP to THEATER IN. You
can also connect the THEATER OUT to an input on your SSP,
allowing you to do signal processing on selected two channel
sources. When THEATER is selected, the level controls are set
and locked to unity gain. Level and balance control are then
accomplished via your surround sound processor.
MAIN OUT: Connect to the input of your amplifier (or crossover in
a bi-amplified system). We recommend the use of an amplifier with
an input impedance of 20k ohms or higher. Since this preamplifier
inverts phase, it may be necessary to invert the speaker leads to
maintain correct absolute phase. See the section on “Getting the
Most From Your ET3 Preamplifier" for an explanation.
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