TOA Electronics TA 1400 - Manual (Page 12)

Within the Neutrik® Combojack there is a ¼”(6.3mm) phone jack, which is wired in parallel with the
XLR.
TIP HOT
RING COLD
SLEEVE SHIELD/GROUND
Figure 6. ¼” TRS plug
The input impedance is high enough (20 kohms balanced) to
allow ”daisy-chaining”, or multiple parallel input connections.
The headroom of the input circuits is also high enough to
accept the maximum output level from virtually any low-level
signal source. Balanced signals are less sensitive to AC hum
and radio interference. The source impedance should be le
than 1 kohms to avoid high frequency loss in long cable
ss
s.
To daisy chain amplifiers, use the screw-terminal
o
7.1.2 Unbalanced inputs
o connect an unbalanced source, tie pin 3 (ring on TRS jack) down to the shield of the connector. If
wn in Figure 8. This is similar to the connection
igure 7. Unbalanced line connection Figure 8. Balanced line with unbalanced
(Phoenix connector), labeled Link, provided on each
channel. It is connected in parallel with the Neutrik® Comb
jack on each input.
T
you leave one pin disconnected, you will lose 6 dB.
A better method for using unbalanced sources is sho
for balanced lines, but pin 3 is connected to the shield at the source. The hum and noise rejection for
the cable is equivalent to that for a balanced line. To minimize hum in the audio, use balanced inputs
whenever possible.
F
Tannoy Limited
TA 1400 User Manual 11-06-02
11
equipment
or two-channel (stereo) operation, use both channels A and B. For tandem stereo or bridged F
mono operation, use only one of the inputs. See
operation modes for more details.