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Les langues disponibles
C
R
P U S H
T 500mA L
Made in Europe (Fr)
R
100-240V
47/63Hz 30W
G
A)
3 pins XLR female, left stereo input.
B)
3 pins XLR female, right stereo input.
Same for inputs 2 to 8.
C)
Power switch.
D)
¼ inch headphone socket (1 to 8)
GEM 808 features an internal power supply setting, limiting the power to the headphones. This allows to
comply with the acoustic pressure regulation according to the headphone impedance.
Setting uses dip switches: see below.
OFF
+17.5 dBu
1
106.5 dB SPL
OFF
+16.8 dBu
2
105.7 dB SPL
OFF
+15.5 dBu
3
104.5 dB SPL
OFF
+14.8 dBu
4
103.8 dB SPL
RAmi - GEM 808
REAR PANEL DESCRIPTION
L
P U S H
R
P U S H
L
P U S H
R
P U S H
IN 8
IN 7
IN 6
L
R
L
R
OUT 8
OUT 7
OUT 6
OPTION
OPTION
F
OFF
+14 dBu
5
103 dB SPL
OFF
+13 dBu
6
102.1 dB SPL
OFF
+12.2 dBu
7
101.2 dB SPL
OFF
+11.4 dBu
8
100.4 dB SPL
L
P U S H
R
P U S H
L
P U S H
R
P U S H
L
IN 5
IN 4
L
R
L
R
L
OUT 5
OUT 4
EXT
8
7
E
Example :
The following values are measured on a Bayer DT150 headphone
impedance 250 Ohms
The dBu level corresponds to a 1000 Hz just before saturation point.
The dB SPL level measured using a B&K 2260 sono meter, Laeq
protocole, pink noise at the saturation point.
The sono meter sensor is 2cm in front of transducer, and the
headphone is open.
For other headphones, carry the same survey and set the switches
to reach the required dB SPL level.
GEM 808 is delivered with limiter OFF.
OFF
9
OFF
10
OFF
11
OFF
12
19
P U S H
R
P U S H
L
P U S H
R
P U S H
L
P U S H
IN 3
IN 2
R
L
R
L
OUT 3
OUT 2
6
5
4
3
D
OFF
+11 dBu
13
100 dB SPL
OFF
+10 dBu
14
99 dB SPL
OFF
+9.3 dBu
15
98.3 dB SPL
OFF
+8.5 dBu
16
97.5 dB SPL
B
A
R
P U S H
L
P U S H
IN 1
R
L
OUT 1
2
1
+7.8 dBu
96.8 dB SPL
+7 dBu
95.9 dB SPL
+6.2 dBu
95.2 dB SPL
+5.7 dBu
94.7 dB SPL
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