SAFET
Y
INF
O
SET
UP
OP
ERA
TION
SUB
FINE
TUNING
MISC
W
ARRANT
Y
OP
ERA
TION
TRIO
SAFET
Y
INF
O
SET
UP
OP
ERA
TION
SUB
FINE
TUNING
MISC
W
ARRANT
Y
OP
ERA
TION
TRIO
18
19
TRIGGER
SENSOR
12V DC
OUT
IN
ON/OFF
POWER ON
DIMMER
TOTAL GAIN
GND
MODE
TOGGLE
E FUSE
RESET
DRIVER GAIN
INTERNAL CONNECT PORT
OUTPUT TO DRIVER
LOW
MID
HIGH
+ 1.5
–
1.5
+ 1.5
–
1.5
+ 1.5
–
1.5
0dB
+ 1.5
–
1.5
+ 3
–
3
+ 6
–
6
INPUT
OUTPUT
BALANCED SIGNAL
A
D
B C
ENGAGED
FUSE
POWER
FOR HOME OR OFFICE USE
11
0
–
240
V
~
50
/6
0
H
Z
M
A
X
P
O
W
E
R
C
ON
SU
M
P
TI
ON
–
50
0
W
F
U
SE
2.
5
A
SL
O
W
W
ARNING!
E
LE
C
TR
IC
AL
SH
OCK
H
AZAR
D
D
O
N
O
T
OP
E
N
!
SERIAL NO.
TRIO G3
ITRON AMP–TRIO
MADE IN GERMANY
SPEAKER TYPE
MODEL NO.
ORIGIN
PUSH
FUSE
PUSH
OPERATION – TRIO G3 ITRON VERSION
AUDIO SOUND ADJUSTMENTS
The 3 x DRIVER GAIN switches
allow tonality adjustments of the
3 x horns in –1.5 dB, 0 dB (= FLAT) and +1.5 dB steps.
LOW
adjusts the level of the lowrange horn (100 - 600 Hz)
MID
adjusts the level of the midrange horn (600 - 4.000 Hz)
HIGH
adjusts the level of the tweeter horn (above 4.000 Hz)
Factory default is the “O dB” position for all 3 switches.
Adjustments may be made according to personal taste, for
adapting to the tonal “brightness” (or lack thereof) of connected
source equipment, or to mildly correct room acoustic influence.
In practice, the tonal balance between the 3 x f requency bands can
be altered up by up to 3 dB. For example:
With the HIGH and LOW switches set to +1.5 dB, and the MID switch
set to –1.5 dB, the relative volume of the midrange is reduced by 3
dB against the tweeter and lowrange horns. This could be used as a
favorable voicing for “shouty” recordings (with over-emphasized
midrange f requency content) or in an acoustical environment that
has a “peak” in the midrange.
18
11
12
DRIVER GAIN
LOW
MID
HIGH
+ 1.5
–
1.5
+ 1.5
–
1.5
+ 1.5
–
1.5
0dB
DRIVER GAIN
LOW
MID
HIGH
+ 1.5
–
1.5
+ 1.5
–
1.5
+ 1.5
–
1.5
0dB
OPERATION – TRIO G3 ITRON VERSION
GAIN ADJUSTMENTS
The 3 x TOTAL GAIN switches
allow the adjustment of the gain of
the speakers to the strength of the line level signal f rom the
connected preamp. To avoid sound degrading potentiometers in
the signal path, 3 x switches in an additive stepped arrangement are
being used. Factory default is the “0 dB” position for all 3 switches.
Practical example: If a preamp already makes big “jumps” in sound
level by turning the volume knob just slightly, reducing the iTRON’s
input gain by up to –10.5 dB may increase the adjustment angle of
the pre amps volume knob considerably, thus enhancing its
practical usefulness for f ine volume adjustments.
The following steps are possible:
+/– 1.5 dB
= left switch in “+” or “–“ position
+/– 3 dB
= central switch in “+” or “–“ position
+/– 4.5 dB
= central & left in “+” or “–“ position
+/– 6 dB
= right switch in “+” or “–“ position
+/– 7.5 dB
= right & left in “+” or “–“ position
+/– 9 dB
= right & central in “+” or “–“ position
+/– 10.5 dB
= all 3 switches in “+” or “–“ position
TOTAL GAIN
0dB
+ 1.5
–
1.5
+ 3
–
3
+ 6
–
6
TOTAL GAIN
0dB
+ 1.5
–
1.5
+ 3
–
3
+ 6
–
6
TOTAL GAIN
0dB
+ 1.5
–
1.5
+ 3
–
3
+ 6
–
6
TOTAL GAIN
0dB
+ 1.5
–
1.5
+ 3
–
3
+ 6
–
6
TOTAL GAIN
0dB
+ 1.5
–
1.5
+ 3
–
3
+ 6
–
6
TOTAL GAIN
0dB
+ 1.5
–
1.5
+ 3
–
3
+ 6
–
6
TOTAL GAIN
0dB
+ 1.5
–
1.5
+ 3
–
3
+ 6
–
6
TOTAL GAIN
0dB
+ 1.5
–
1.5
+ 3
–
3
+ 6
–
6
OP
ERA
TION
TRIO
OP
ERA
TION
TRIO
