6
B.
INPUTS
There are four (4) RCA type female inputs. Your interconnects
will require male RCA terminations. Facing the rear of the
chassis, the input connections are to the right of the IEC
power input and the Pre Out terminal pair. The left channel
connector is the top one in each line input pair. Please refer
to Figure 5.
C.
PRE OUT CONNECTIONS
The T-1500 has a pair of RCA type female Pre Out
(Preamplifier outputs – refer to Figure 5) connections on the
rear of the chassis, between the IEC connection and the Line
Inputs. The Pre Outs are connected passively; therefore,
when they are in use, the PCL86 and 300B’s continue to draw
power and operate. These connections are for use to connect
to one or a pair of powered subwoofers or, for bi-amping, to
an external stereo power amplifier or pair of monoblock
amplifiers (preferably with the same gain as the T-1500).
C.
SPEAKER TERMINALS
The T-1500 is equipped with two pairs of high-quality speaker
terminals. These terminals are located at the left of the back
of the chassis (the right, facing the front of the chassis). The
positive terminal for each pair is on top, the negative below.
Between the pairs of terminals is a vertically oriented toggle
switch to select between either 4 or 8 ohm speaker
impedance or 8 and 16 ohm impedance, as pre-specified by
the owner. The T-1500 utilizes a circuit design that provides
for full power from the output transformer regardless of the
impedance selected with the toggle switch. Set the toggle
switches to your preferred speaker impedance. Facing the
rear of the chassis, the right pair are on the left outside left
and the left channel pair are on the inside right. Facing the
front of the chassis, the right channel pair is on the outside
right and the left channel pair is to their left, on the other
side of the impedance toggle. The terminals accept bare wire
(not recommended) and spade and banana type connectors.
Please refer to Figure 5.
D.
POWER CONNECTION
Connect the input interconnects and/or the speaker
cables or the Pre Out connections before you insert the
power cable into the receptacle at the centre of the
chassis rear. The T-1500 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 5.
The T-1500 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 T-1500 in place and all connections have
been made to your turntable and preamplifier, you are ready to
turn on the power for your T-1500; before you power it up,
though, be sure you have:
removed ALL the cushion materials from inside the tube
chimneys
checked that all tubes are snug in their sockets and that the
pin alignments for the 300B’s are correct (wide diameter
pins and narrow diameter pins in the correct holes of the
sockets.
This is essential.
The 300B tubes are fused, as is the
mains for the unit, and they should preserve both the tubes
and the amplifier, in case you have removed and replaced
the 300B’s incorrectly. However, you will have to replace
fuses, and the damage to your self-esteem for getting it
wrong may haunt you forever. Hammertone Audio and Allnic
Audio Labs are not responsible for such an outcome.
ensured the interconnects are 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
Turn on the T-1500 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 T-1500 will be powered on.
