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OPERATION – ITRON VERSION
AUDIO SOUND ADJUSTMENTS
SPEAKER TYPE
UNO G3
DUO G3
MODEL NO.
ITRON AMP
ORIGIN
MADE IN GERMANY
only to be used with marked speaker type
+ 1.5
+ 1.5
0dB
ENGAGED
FUSE
– 1.5
– 1.5
RESET
MID
HIGH
E FUSE
DRIVER GAIN
1 1
The 2 x DRIVER GAIN switches � allow the volume of the 2 x horns
+ 1.5
+ 1.5
to be adjusted in –1.5 dB, O dB (= linear) and +1.5 dB steps.
0dB
– 1.5
– 1.5
MID
HIGH
MID controls the level of the midrange horn (approx. 200–4,000 Hz)
DRIVER GAIN
HIGH controls the level of the high frequency horn (above 4,000 Hz)
The factory setting is the "O dB" position for all 2 switches.
Adjustments can be made according to personal taste, to match the
tonal "tonality" of the connected source equipment, or to slightly
correct for room acoustic influences.
In practice, the tonal balance between the 2 x frequency bands can
be changed by up to 3 dB. Example:
If the HIGH switch is set to +1.5 dB and the MID switch is set to –1.5
+ 1.5
+ 1.5
0dB
dB, the relative loudness of the midrange speaker compared to the
– 1.5
– 1.5
tweeter horn is reduced by 3 dB. This could be used as a beneficial
MID
HIGH
voicing for "shrill" recordings (with overemphasized midrange) or in
DRIVER GAIN
an acoustic environment with a "peak" in the midrange.
WARNING
ELECTRICAL SHOCK HAZARD
PUSH
DO NOT OPEN!
110 – 240V ~ 50/60HZ
MAX POWER CONSUMPTION – 570W
POWER OUTPUT – 530W RMS
FUSE 2.5 A SLOW
+ 1.5
+ 3
+ 6
0dB
0dB
– 1.5
– 3
– 6
IN
OUT
BALANCED INPUT
TOTAL GAIN
1 2
OPERATION – ITRON VERSION
GAIN ADJUSTMENTS
The 3 x TOTAL GAIN switches
+ 1.5
+ 3
+ 6
the speakers to the strength of the line level signal from the
0dB
connected preamp. To avoid sound degrading potentiometers in
– 1.5
– 3
– 6
TOTAL GAIN
the signal path, 3 x switches in an additive stepped arrangement are
being used. Factory default is the "O 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 fine volume adjustments.
The following steps are possible:
+ 1.5
+ 3
+ 6
+/– 1.5 dB
0dB
– 1.5
– 3
– 6
TOTAL GAIN
+ 1.5
+ 3
+ 6
+/– 3 dB
0dB
– 1.5
– 3
– 6
TOTAL GAIN
+ 1.5
+ 3
+ 6
+/– 4.5 dB
0dB
– 1.5
– 3
– 6
TOTAL GAIN
+ 1.5
+ 3
+ 6
+/– 6 dB
0dB
– 1.5
– 3
– 6
TOTAL GAIN
+ 1.5
+ 3
+ 6
+/– 7.5 dB
0dB
– 1.5
– 3
– 6
TOTAL GAIN
+ 1.5
+ 3
+ 6
+/– 9 dB
0dB
– 1.5
– 3
– 6
TOTAL GAIN
+ 1.5
+ 3
+ 6
+/– 10.5 dB
0dB
– 1.5
– 3
– 6
TOTAL GAIN
20
21
�
allow the adjustment of the gain of
= left switch in "+" or "–" position
= central switch in "+" or "–" position
= central & left in "+" or "–" position
= right switch in "+" or "–" position
= right & left in "+" or "–" position
= right & central in "+" or "–" position
= all 3 switches in "+" or "–" position