Oxmoor 4x4 - Manual (Page 4)

OXMOOR 4X4 BUFFER AMPLIFIER
CHANNEL A CHANNEL B CHANNEL C CHANNEL D
PIN 2 POSITIVE
ON ALL AUDIO
CONNECTIONS
FUSE POWER
CHASSIS
SERIAL NUMBER
D C B A
OUTPUT
D C B A
INPUT
CAUTION REPLACE ONLY
WITH SAME TYPE FUSE
Figure 2.0: Block Diagram of Factory Set-Up
electronically balanced, accepts balanced or unbalanced
signals from line-level devices. Normal input level is
+4 dBu with a maximum input level of +24 dBu.
5. FUSE HOLDER - Replace only with approved type of fuse
in a rating appropriate to the mains voltage, as indicated
on back panel. (See SPECIFICATIONS, page 9.)
6. POWER CONNECTOR - Standard IEC 3-pin connector for
AC power cord. Use only with grounded (3-wire) outlets.
Cord sets are available for all world connection standards.
7. CHASSIS GROUND POST - A screw with a star washer
enables the installer to secure a ground wire to the chassis.
Page 2
Figure 1.1: Rear Panel View
4x4 CALLOUTS
1. POWER STATUS LED – Indicator for AC Power On.
2. INPUT TRIM – Trim pots, accessed through the front panel
with a small flat-blade screwdriver, offer
±
15 dB gain ad-
justment to match different operating levels or balance lev-
els across channels.
3. PROGRAM OUTPUTS – Audio outputs, XLR-M–type con-
nectors, Pin 2 positive, electronically balanced, accept bal-
anced or unbalanced signals. Recommended load impe-
dance is 600 ohms or greater. Maximum output level is
+26 dBu.
4. PROGRAM INPUT – Audio input, XLR-F–type connector,
Figure 1.0: Front Panel View
6 5 7 4 3
2 1
D
C
B
A
D
C
B
A
D
C
B
A
D
C
B
A
3
3
2 1
3
3
2 1
2 1
3
2 1
3
2 1
A
B
C
D
A
B
C
D
A
B
C
D
D
C
B
A
2 1
2 1
2 1
3
3
D
C
B
A
D
C
B
A
D
C
B
A
BALANCED/UNBALANCED
OUTPUT JUMPER
GAIN TRIM
±
15 dB OUTPUT STAGE SOURCE SELECTORS GAIN STAGE SOURCE SELECTORS
4X4 BLOCK DIAGRAM