Laney A1 User Manual page 7

Laney
sound. The Enhance control does this by providing a dip in the frequency-response of the amplifier at approximately 250Hz.
This dip reduces some of the harmonics of the important low-frequencies around 80-120 Hz producing better definition to
your sound. Turning the control through to its maximum has the effect of boosting both the low and high-frequency content.
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Active Bass control allowing boost and cut of the low-frequency response of the pre-amplifier.
Selects the mid-frequencies (200Hz to 9KHz) to be cut or boosted in conjunction with the paramid level control
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Boosts or cuts the chosen frequency set by
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frequency turn anticlockwise.
Active Treble control allowing boost or cut of the high frequency response of the pre-amplifier.
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This is an active filter control that allows you to boost the high frequencies around 10KHz. It can be used to add a high end
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piezo/bowlback characteristic to the amplifiers response.
Switches the phase of the signal from the amplifier. When you play any acoustic guitar the sound it produces is a waveform,
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the same applies to an acoustic guitar plugged into an acoustic amplifier. It is not uncommon for these two waveforms -
which occur simultaneously be out of phase with each other. To a player who is 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.
The Notch filter can be switched in and out here and adjusted with
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associated with amplified acoustic guitar at high volume levels.
To eliminate "body resonance" feedback switch the filter in with
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you should find a sweet spot on the control where it disappears. Turning further out of the sweet spot will bring the
resonation back up again. This setting will be the optimum for that particular guitar but may need to be altered if you plug in
another guitar.
16 Sets the volume of the instrument plugged into channel 1.
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Led is lit when channel 1 is muted (with )
Mutes whatever instrument is connected into channel 1. Led
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Sets the overall listening volume of the amplifier. Make sure the channel volumes are not set too low (
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To boost the chosen frequency turn the control clockwise, to cut the chosen
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and adjust this control until the body resonation reduces,
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is lit when muted.
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OPERATING INSTRUCTIONS
to eliminate the "body resonance" feedback often
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10
)
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