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Outputs
IMPEDANCE
Output
Designed for
Use W
ith
Actua
l
(Internal)
Output
Clipping Level
Microphone Any low imped-
anc
e m
icrophone
input
0.5,
–34
d
B
(2
0 m
V)
Mix Bus
3.5 k
,
3.5 k
,
–8 dBV
(400 mV)
Head
-
phones
8 - 2000
,
200,
recommended
400
, W
3 k, ∗∗
+10 dBV
(3.3 V)
Line
600, 150,
+18
dBm
(6.2 V)
∗∗
Depending on level control setting
Noise
Equivalent Input Hum and Noise: –126 dBV (low
impedance
microphone, 150
,
- 20-20,000 Hz) into a
600
, load
at full gain
Output
N
oise
:
–7
5 d
B
V (
maste
r c
ontro
l f
ull
y c
ounter-
clockwise), –53 dBV (master fully clockwise), (input
controls
d
own
, 3
00-20,00
0 H
z)
Output Hum and Noise: –70 dBV (master control
down), –51 dBV (master control up) (input controls
down,
2
0-20,00
0 H
z)
Distortion
0.35% or less THD from 30 to 20,000 Hz at +15 dBm
output;
0
.5
% o
r l
es
s I
M d
istortio
n u
p t
o +
1
5 d
B
m o
utput
level
Common Mode Rejection
65 dB minimum with input of –20 dBV at 100 Hz
Control Interaction
Less than 1 dB with any control combination
Overload and Shorting Protection
Shorting the outputs, even for prolonged periods, will
cause no damage; microphone inputs will not be dam-
aged
b
y s
ignal
s u
p t
o 3 v
olts
Lo-Cut Filters
6 dB/octave rollof
f at 150 Hz
Limiter
Threshold:
+15 dBm (line output level; adjustable
from –4 to +18 dBm)
Attack T
ime:
3 msec typical
Recovery T
ime:
500 msec typical
Peak Indicator
Lights
6 dB below clipping or at onset of limiter
action
Headphone Output Clipping Level
3.16V (+10 dBV) into 200
,
T
one Oscillator
1,000 Hz, 1.5% or less THD
Phantom Power
30 Vdc open-circuit, 3.3 k, series resistance, input
switches
in MIC position only
Operating V
oltage
Ac Operation: 120 or 240 volts ±10%, 50/60 Hz,
9.5W,
internally switchable
[
Dc
Operation:
27 volts nominal at 15
mA typical no-
signal, 18 mA typical at 0 VU (+4 dBm) output with
headphone
load; 21.5 volts minimum
Battery
life:
approximately 20 hours with alkaline
bat
-
teries
at +4 dBm output
in continuous use; three 9-volt
batteries, type NEDA 1604A (Duracell MN1604 rec-
ommended)
[ Supplied wired for 120 Vac operation (See Service section for
240
V
ac operation)
Temperature
Range
Operating: –18
o
to 57
o
C (0
o
to 135
o
F)
Storage: –29
o
to 71
o
C (–20
o
to 160
o
F)
Dimensions
See Figure 1
309
mm
(12
5
/
32
in.)
68.8mm
(2
23
/
32
in.)
6.3 mm
(
1
/
4
in. )
229 mm
(9 in.)
FIGURE 1
Weight
Net: 2.3
kg (5 lb 2 oz)
Packaged:
3.2 kg (7 lb 2 oz)
Certifications
Listed
b
y U
nderwriters
’ L
aboratories
, I
nc.,
a
n
d l
iste
d b
y
Canadian
S
tandard
s A
ssociatio
n a
s C
ertified