Front Panel Controls - Laney A-DUO Manual Del Usuario

FRONT PANEL CONTROLS

1. CH1/CH2 MIC/LINE INPUT: Combi sockets provide the flexibility to connect either a
balanced XLR or unbalanced jack terminated cable. Set Level control (2) to minimum before
connecting a device to the Mic/Line inputs. For best results, always use a good quality
instrument/mic cable.
Phantom Power (15V non switchable) is available from the XLR Inputs only. This is
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for use with condenser microphones, but dynamic mic's won't be damaged if used.
Please note that some 48V condenser Mics may not work.
2. LEVEL/PEAK: Use together to find the optimum level for your signal. Adjust the Level so
the Peak only lights during the very highest peaks of the connected signal.
Peak illuminates constantly = possible distortion. Damage won't occur to the
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amplifier, but audio quality may suffer.
Peak is never illuminated = slightly reduced signal to noise ratio as amplifier is not
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running at optimum levels.
3. SHAPE: Engages an EQ circuit to give a brighter, more extended top end and scooped mid
to provide more definition.
4. EQ: A traditional set of tone controls giving the player a natural set of tools to shape their
ideal sound. As a starting point, set the EQ controls to the 0 position.
5. CHORUS: To engage the Chorus press the Chorus switch. The adjacent LED lights only
when the effect is active. To adjust the chorus amount, press and hold the Chorus switch (while
the chorus is active) and adjust using the Reverb control. Once you release the Chorus switch,
the LED will briefly flash to indicate the setting has been stored.
The amplifier is shipped with a Chorus level of 3.
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6. REVERB LEVEL: Use these to independently control the reverb/chorus for channels 1
and 2. The Reverb Level increases progressively as you move the control from 0 to 10.
Amp
7. ANTI-FEEDBACK: When the Anti-Feedback control is enabled the A-Duo actively and automatically searches for any signs
of feedback (over multiple frequencies) and eliminates it before becoming a serious problem.
If you have microphones connected, enable the Anti-Feedback.
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8. PHASE SWITCH: Inverts the phase of the signal from the amplifier output. When you play any acoustic guitar the sound it
produces is a waveform, the same applies to an acoustic guitar plugged into an acoustic amplifier. It is not uncommon for these
two waveforms to be out of phase with each other. To a player sat close to an amplifier this poses a small problem if the wave
forms are out of phase as they are destructive to each other and cancel each other out. This would cause the guitar to sound a
little thin and lack-lustre. Engaging the phase switch switches the phase of the amplified signal removing the problem of
destructive interference. However sometimes the low frequencies being in phase can cause acoustic feed back problems, to avoid
this try operating the phase reversal switch. Most times this will cure the problem. One thing to point out is that the audience
does not hear any phase problems as by the time the sound wave reaches them any phase differences have been cancelled out
naturally.
9. VOLUME: To control the overall output level from the loudspeaker, phones, FX Send and D.I. Out.
10. MUTE: This will mute CH1 and 2, but not signals connected to AUX IN or FX RETURN.
The Power Led will flash when the Mute is enabled.
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11. POWER: Illuminates when the Power Switch is set to 1.
Also controls Chorus Level.
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Audio feedback is caused when a loop occurs between a microphone or guitar pickup and the
loudspeaker. Commonly caused by pointing a microphone at a speaker or simply by the two
being too close. The result is an unpleasant screeching or whistling sound. The A-Duo is
equipped to deal with this.
EN
A-DUO
VOLUME
MUTE
POWER
A A A
Duo Duo
0 10
ACOUSTIC ACOUSTIC
ANTI-FEEDBACK PHASE
REVERB
0 10 0 10
CHR ADJ CHR ADJ
CHORUS CHORUS
0 0
TREBLE
0 0
MIDDLE
0 0
BASS
SHAPE SHAPE
LEVEL
PEAK
CH1 CH2
6