OWNER’S MANUAL
AV uno
/
14
8. INPUT CONTROLS
AV uno
50
85
60
150
HZ
115
135
LO PASS
50
85
60
150
HZ
115
135
HI PASS
50
90
70
HZ
PRE OUT
20
30
25
50
HZ
35
40
SUBSONIC
0
3
2
6
+ dB
4
5
BOOST
NORMAL
POLARITY
POLARITY
REVERSE
LO
FULL
1
8
7
11
12
10
9
3
2
5
4
6
8.1
CONTROL PANEL: SWITCHES AND ADJUSTMENTS
1.
LEVELS (0.3V - 5V):
LEVELS (0.3V - 5V): Input sensitivity of the Left and Right channel control. Set the knob on
position 1. Use a CD as a source and increase the source volume until you hear distortion, then lower it slightly to
eliminate distortion. Increase the amplifier LEVELS to optimize the output signal without distortion.
2.
PASS MODE (LO - FULL):
Switch to select filter type. Select
FULL
to get a full range output signal.
Select
LO
to get an output signal to drive a SUB / WOOFER. The output cut-off frequency should be set by
adjusting the
LO PASS
knob
(see section 3)
.
3.
LO PASS (50 Hz ÷ 150 Hz):
Low-pass filter cut-off frequency adjustment. By turning the knob it is possible to
vary the cut-off frequency from 50 Hz to 150 Hz @ 24dB/Oct.
4.
SUBSONIC (20 Hz ÷ 50Hz):
Subsonic filter cut-off frequency adjustment. By turning the knob it is possible to
vary the cut-off frequency from 20 Hz to 50 Hz with a 24dB/Oct slope. With this filter it is possible to eliminate
the ultra-low frequencies which some audio signals carry and which might cause undesired distortions.
5.
NORMAL / REVERSE POLARITY:
Phase signal adjustment. Select
NORMAL POLARITY
to not have phase
rotations. Select
REVERSE POLARITY
to have 180° phase rotation.
6.
HI PASS PRE OUT (50 Hz ÷150 Hz):
PRE OUT output Hi-Pass filter cut-off frequency adjustment.
By turning the knob it is possible to vary the cut-off frequency from 50 Hz to 150 Hz @ 12dB/Oct.
7.
BOOST (0 +6dB):
Equalizer level adjustment. When set to 0 position, the equalizer is off. By increasing the
adjustment level, the low frequency level increases according to the range selected by setting the
BOOST Hz 50-70-90 switch
(see section 8)
.
With this function it is possible to improve the system’s performance at
low frequencies.
8.
BOOST FREQUENCY (50 Hz - 70 Hz - 90 Hz):
Switch to select the equalizer adjustment frequency. Set the
desired level by turning the BOOST knob
(see section 7)
.
9.
POWER ON:
The green LED indicates that the amplifier is on. If LEDs 9, 10, 11 and 12 are simultaneously lit,
the amplifier will turn off and it will be necessary to contact technical support.
10.
THERMAL:
The red LED indicates the amplifier temperature. It flashes at 60°C and the output power is limited
by 1.5 dB. The flashing frequency increases around 70°C where the output power is limited by 3 dB. The LED
lights up without flashing at about 80°C when the amplifier thermal protection starts operating. The amplifier will
restart at about 70°C.
8
Summary of Contents for AV uno
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