BRANCH II
FRONT PANEL OVERVIEW
16
15
17
LEVEL
1
2
0 20
19
18
12
8
5
3
4
7
6
13
14
10
9
11
HP FILTER
GAIN SELECT
35
cps
125
OUT
80
250
dB
45
40
50
60
55
DI
60037.5
INPUT
IMPEDANCE
150
16k
EQUALIZER
ROOTS / BRANCH II
tree audio / los angeles
-
4
222
LEVEL
+
L0
4
6
-
HI
4
FREQUENCY
dB
0
L0
dB
0
HI
80
50
cps
100
400
cps
10k
7k
12k
2
+
4
6
OUT
IN
250 cps
HPF
ZERO
VU
LIMITER
12
GAIN
REDUCTION
20
4
2
0
6
10
8
16
18
14
OFF
48 Vdc
MUTE
ON
-20
-10
OFF
MIC 0
MIC
LINE
GR
METER SELECT
IN
OUT
POWER
OUTPUT
LEVEL
(1)
(2) (3)
(4)
(5)
(6) (7)
(8) (9)
(10)
(11)
(12)
(13)
(14)
(15) (16)
(17)
(19)
(18)
(20)
(1) BIG KNOB LEVEL - Controls input level (mic and line)
(2) HI PASS FILTER - @ 80Hz/120Hz/250Hz - 6 dB per octave
(3) GAIN SELECT SWITCH - Controls gain of 1st tube stage, 35,40,45,50,55,60 dB
(4) INPUT IMPEDANCE SWITCH - Controls input impedance of input transformer, selectable between
37.5 Ohms, 150 Ohms or 600 Ohms, nominal input for line input is 150 Ohms
(5) 1/4” DI INPUT - Hi Z in for guitar/bass/keyboard passive or active
Set source select switch (15) to line level for high level signals or mic for low level signals
(6) LO FREQ SELECT - 50Hz, 80Hz, 100Hz, 400Hz Baxandall type / all shelving
(7) HI FREQ SELECT - 7k, 10k, 12k, 16k Baxandall type / all shelving
(8) LO LEVEL SELECT - Boost up to 6dB in 2 dB steps/cut up to 4 dB in 2 dB steps
(9) HI LEVEL SELECT - Boost up to 6dB in 2 dB steps/cut up to 4 db in 2 db steps
(10) LIMITER IN / OUT HI PASS FILTER SWITCH - HPF 250 Hz @ 6 dB per octave, for detector circuit only
(11) LIMITER GAIN REDUCTION POT - Clockwise adjusts gain reduction (optical)
(12) VU METER ZERO ADJUST - To align the meter set meter select switch (18) to GR (gain reduction) and
adjust VU meter to “0” on the meter
(13) PAD SWITCH - Pads down the input level by -10 dB or -20 dB mic only
(14) PHANTOM 48Vdc switch, supplies phantom power to condenser microphones
(15) LINE / MIC / MIC PHASE REVERSE SWITCH - Selects the input source, mic / line or mic phase reverse
(16) MUTE SWITCH - Mutes entire channel
(17) VU METER (looks at line input, limiter gain reduction, and output level)
(18) METER SELECT SWITCH - IN position looks at line level only, not mic level / GR (gain reduction)
is used to monitor limiter levels / OUT position is used when looking at the ouptut level of the whole
channel, including mic levels
(19) OUTPUT LEVEL - Overall ouptut level, this should typically be set full up, fully clock wise
Attenuates (cuts) only if output level is overdriving next piece of equipment
(20) POWER SWITCH - Turns the Branch II on or off.
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