4.1 Rear Panel Description
LINE INPUT (Left and Right)
Female XLR-3 connectors. Balanced input for
line level signals to +36dB maximum.
(pin +2 hot)
LINE OUTPUT (Left and Right)
Male XLR-3 connectors. Balanced DC coupled,
capable of +30dB into 600 ohms.
(pin +2 hot)
GROUND LINK
2-terminal barrier strip. Provided to isolate
chassis ground from audio ground. To lift
ground, simply unscrew both phillips-head
screws and remove the metal strip held by the
screws.
AC INPUT & FUSE
Combination IEC socket, voltage selector and
fuse location. AC voltage is factory set as
ordered. To change the factory voltage setting,
refer to the AC Voltage Selection section of this
manual in Chapter 3 (page 11), or contact your
authorized Avalon dealer.
For instructions on changing the fuse, see
Chapter 3.4 Fuse Replacement (page 12).
4.2 Connections
The LINE INPUTS are an electronically
balanced Class A circuit with a nominal 20k ohm
input impedance. (Can be used unbalanced by
shorting pin 3 to ground on the cable connector.)
The connectors are female XLR-3.
The OUTPUTS
are a low impedance
electronically balanced circuit which terminates
to a male XLR-3 connector. (Can be used
unbalanced by shorting pin 3 to ground on the
cable connector.)
All XLR connectors are wired:
Pin 1
ground
Pin 2
high (+)
Pin 3
low (-)
Input Impedance: 20k Ohm
Output Impedance: 600Ohm
4.3 Unbalanced Operation
The Vt-747sp can also be used in unbalanced
mode by grounding pin 3 on the cable input
and output pins.
4
3
2
1
Page 17
Avalon Vt-747sp Operation Manual
Operation and
Controls
AVA L O N D E S I G N
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2
3
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AVA L O N D E S I G N
