7
B.
INPUTS
There are two (2) female inputs (See Figure 4). One accepts a balanced cable with a male XLR connector;
the other accepts 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/neutral”; the bottom position is for
the reverse (in both cases, pin 1 is ground).
C.
SPEAKER TERMINALS
Each A-5000 DHT is equipped with one pair of high-quality speaker terminals (See Figure 4). These
terminals are located in the middle of the rear panel of the A-5000 DHT chassis, with the red marked
terminal for the live connection labelled positive “+” on the right, and with the return connection labeled
negative “-”, to the left (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), spade and banana type connectors.
D.
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 (See Figure 4). The A-5000 DHT uses a
standard 15 amp three prong male IEC connection for AC input. You need to use power cords with a
female 15 amp, three prong IEC connector at one end. The Allnic ZL-3000 and ZL-5000 power cables
will make an excellent match.
The A-5000 DHTs you have purchased are set internally for either AC 110/120 volt – 60 HZ, or 220/230
volt – 50 HZ operation. There is no way to change this to another AC setting without return of the A-
5000 DHTs to the factory for re-wiring, at the owner’s cost, including transport both directions.
INITIAL POWER-ON
Once you have your A-5000 DHTs in place and all connections have been made to your source(s) and
preamplifier, you are ready to turn on the power for your A-5000 DHTs. Before you power up the A-5000
DHTs, though, be sure you have:
•
removed ALL the cushion materials (e.g., cardboard) from inside the tube chimneys. Any silicone
rings or other damping material (not cardboard or Styrofoam packing materials) on the RS242
should be left ON the tube.
•
selected the input connection you want to use, single ended (RCA) or balanced (XLR) and, for XLR
selected the correct phase position of 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
