ALLNIC AUDIO H-3000 Benutzerhandbuch - Seite 7

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1. Tubes

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.

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.

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 "#/#" scale corresponds to the turn ratio for the MC

transformer. 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.

IMPEDANCE CONTROL

The Impedance control is located at the rear of the top

plate of the H-3000 chassis (see Figure 6). It has four

positions, 10, 20, 30 and 47 KΩ (thousand ohms). Use the

impedance control to match the H-3000 to the impedance

of your MC cartridges. By experimenting with the

impedance settings and the transformer controls together,

you can obtain optimum performance from your moving

coil cartridges. You will need to experiment to find the

"sweet spot" combination for each MC cartridge because

even the cables from your cartridge to the tonearm, your

internal tonearm cable, and your phono cable will all affect

impedance level. We suggest starting with the

specifications from your cartridge and using the

impedance level closest to that. Please refer to Table one

to see the possible combinations for MC cartridges and the

resulting operating impedances and gain. Of course,

impedance for MM cartridges remains constant at 47 KΩ.

In the Specifications section, you will read that the 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.

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,