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screw type connector. This connector is the ground
connection for a ground wire from a cartridge and/or
turntable.
When you are facing the front of the H‐3000, the two pairs of
MC connections are on the right/centre of the unit, with the
two MM connections immediately to their left on the other
side of the ground connection.
The H‐3000 has been designed and manufactured to work
most synergistically with Allnic Audio preamplifiers, pre‐
phono stages and equalization products.
D.
OUTPUTS
The H‐3000 is equipped with one pair of unbalanced or
"single‐ended" (RCA) outputs and one pair of true balanced
(XLR) output connections. The left channel output
connections are labeled "left output" and are just to the left
of the DC Source Input. The right channel output connections
are labeled "right output" and are on the far left hand side of
the rear of the phono stage unit (See Figure 1). In each pair,
the balanced (XLR) connection is labeled "1", and the
unbalanced (RCA) connection is labeled "2".
Above each pair of outputs, comprised of one single‐
‐ended (RCA) connection and one balanced (XLR)
connection, is a switch for selecting either the balanced
or the single‐ended connector. The switches are labeled
"unbalanced output". Moving the unbalanced output
switches to the right (facing the rear of the unity) sets
the outputs to their respective unbalanced (RCA)
connector. Of course, the opposite position in each
case sets the switches for the balanced connectors. Be
sure to have both switches set for the connection you
are using. You may have both balanced and unbalanced
outputs connected at the same time without
introducing hum PROVIDED you have the output
switches set to unbalanced output.
E.
Moving Coil (MC) Transformer Controls
On the top of each channel's MC transformer on the
centre rear of the chassis deck of the phono stage unit,
there is a rotating control. Turn the control knob to select
from four gain factors.
The "X#" scale corresponds to the factor that you will select
for the millivolt output of your selected MC cartridge. Each
position on the X# (factor) scale corresponds to an increase
in gain, indicated on the "+#dB scale. You should use
identical settings for both transformers to avoid channel
imbalance.
NOTE:
Please mute your H‐3000, and/or reduce your
preamplifier's volume control, during transformer gain
adjustments. Be aware if you are increasing gain, that you
may hit an uncomfortably loud volume level.
F.
A NOTE ON PHASE
Phase issues generally will result in lack of bass and/or
focus of the stereo image. You may need to reverse
connections on your cartridge if you are having phase
issues. As is usual in these circumstances, some trial and
error experimentation may be required to find the correct
position. The process is simplified for you with the H‐3000,
as it has a phase control switch on the front panel of the
phono stage unit.
G.
IMPEDANCE
In the Specifications at the end of this manual, you will
read that the moving coil (MC) input impedance for the H‐
3000 is up to 470 ohms. This value represents the internal
impedance of the cartridge itself, and is at the very
extreme of what would normally be expected for the
internal impedance of an MC cartridge. It would be
exceptionally unusual to find a cartridge with internal
impedance greater than that value.
INITIAL POWER‐ON
Once you have your H‐3000 in place and all connections have
been made to your turntable and preamplifier, you are ready to
turn on the power for your H‐3000. Before you power up the H‐
3000, though, be sure you have:
•
removed all the cushion materials between the tubes and
the protective parts of the chassis
•
selected the output connections that you want to use, single
ended (RCA) or balanced (XLR), on the two switches on the
back of the phono stage
•
turned the volume down or muted your preamplifier
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