ALLNIC AUDIO A-6000 Owner's Manual - Page 6

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INPUTS

There are two (2) female inputs. One accepts a balanced

cable with a male XLR connector; the other is to accept a

cable with a single-ended, RCA type male connector. These

input connections are located on the right (facing the back)

rear of the chassis, with the balanced input closest to the side

edge. Between the inputs, there is a switch to select one of

two pin configurations for a balanced cable (i.e., it changes

the phase). The top position is for pin 2" hot" and pin 3

"cold"; the bottom position is for the reverse (in both cases,

pin 1 is ground). Please refer to Figure 4

SPEAKER TERMINALS

The A-6000 is equipped with one pair of high-quality speaker

terminals. These terminals are located in the middle of the

rear panel of the A-6000 chassis, with the terminal for the live

connection marked positive "+" on the left, and with the

ground connection labeled negative "-", to the right (facing

the chassis rear). Between the plus and minus terminals is a

switch that provides for either 8 or 4 ohm impedance, as your

speakers may require. The upper position of the switch is for

8 ohm operation; the lower for 4 ohm operation. 8 and 16

ohm terminals are available by special order. The terminals

accept bare wire (not recommended) and spade and banana

type connectors. Please refer to Figure 4.

POWER CONNECTION

Connect the input interconnect and speaker cables

before you insert the power cable into the receptacle at

the left (facing the back) rear of the chassis. The A-6000

uses a standard three prong male IEC connection for AC

input. You need to use a power cord with a female

three prong IEC connector at one end. Please refer to

Figure 4.

The A-6000 you have purchased is set internally for AC

110/120 volt – 60 HZ operation. There is no way to

change this to another AC setting without return of the

unit to the factory for re-wiring, at the owner's cost,

including transport both directions.

INITIAL POWER-ON



Once you have your A-6000 in place and all connections

have been made to your turntable and preamplifier, you

are ready to turn on the power for your A-6000. Before

you power up the A-6000, though, be sure you have:



removed ALL the cushion materials from inside the tube

chimneys



selected the input connection that you want to use, single

ended (RCA) or balanced (XLR), on the switch on the back of

the chassis and have the interconnect firmly attached.



turned on your source(s) and your preamplifier, and turned

the preamplifier's volume control down to zero or otherwise

muted its output



securely and correctly fastened the speaker cables and

ensured that they are also connected properly to the

speakers



checked that all tubes are snug in their sockets

Turn on the A-6000 by pushing the on/off vertically mounted

rocker switch, located at the front of the right side panel (facing

the front of the unit) to the "on" position. The "on" position is

with the vertical line on the switch (the upper portion)

depressed and the part of the switch marked with the "o" (the

lower portion) in the raised position. Of course, the off position

is the reverse. After about a thirty to forty (30 - 40) second delay

(the soft start), the A-6000 will be powered on.

OPERATION

When the power is on, the current meters on the top plate of

the chassis will illuminate. From this point on, operation is

straight-forward.

When you are finished listening, turn off your A-6000(s)

monoblock(s) first; then, turn off your preamplifier and sources.

In the case of any failure, please contact Hammertone Audio for

assistance.

THE CURRENT METERS

These illuminated meters indicate the current supply to each of

the four 300B gain tubes in the A-6000. There is one current

meter for each 300B. There is also a potentiometer and a fuse

for each 300B. (Refer to Figure 5).

When you turn on the A-6000, the needle of each current meter

should be between the two parallel lines on the meter face. Any

error of current supply to or failure of a 300B tube is indicated

by the needle on the 300B tube's respective meter moving out

from between these two parallel lines.