Accusound AMA-1 User manual

Brand: Accusound

Model: AMA-1

Category: Home audio sets

Type: User manual

Acoustic Amplifier Handbook

Contents:

Description 2

Features 3

Dimensions 4

Use 5

Technical Spec 8

Thank you for purchasing the Accusound AMA-1 acoustic amplifier.

Please read the enclosed information. This will help you to

understand the product in which you have invested and enable you to

get the most out of it.

Please take note of the safety warnings and as with all electrical

goods, do not attempt to open the product under any circumstances.

There are no user serviceable parts. All remedial work should be

referred back to Accusound.

Always protect your amplifier from damp. Any moisture on the

cabinet should be immediately dried using a cloth to prevent any from

entering the product through connector sockets or other points.

This unit must only be used with mains supply that has a protective

earth connection.

AccusoundAccusound

AMA-1 60watt acoustic amplifier

172 Wadsley Lane, Sheffield, UK. S6 4EE +44 (0)114 220 3517

The Accusound AMA-1 acoustic amplifier is a professional quality, flexible product.

The amplifier is intended to be used with microphones or pickups with an XLR or

1/4" jack plug connector. Phantom power may be switched on and off using a front

panel button. Similarly the input sensitivity may be changed using a front panel

button, allowing use of many different instrument pickup or CD players.

The front panel also allows independent volume control along with overall system

volume. Three band tone control is available on each channel plus a parametric

control to allow selective enhancement or reduction of a particular frequency.

There are 16 different reverberation programs available. Both channels must use

the same reverberation channel, however the level of reverberation may be

adjusted on each channel independently from none to max.

If this is insufficient, external effects may be added by use of the send and return

sockets on the amplifier.

There is also a headphone socket with independent volume control to allow

personal listening or monitoring.

The DI output is selectable between pre and post main volume control so a clean

signal may be sent to your main amplification system if you are using the AMA-1 for

monitoring.

There are clipping indicators on each input, plus the output, to indicate when you

are approaching the overload limit of the amplifier. (Green indicates good signal

level, Red indicates close to clipping level, no LED illumination indicates a very low

input level.)

Description;

172 Wadsley Lane, Sheffield, UK. S6 4EE +44 (0)114 220 3517

The AMA-1 has many useful professional features to help you make the most of

your playing.

Phantom power (12v) is independently switchable on each channel.

Three band tone equalisation control. Bass, treble and mid control give you

complete control of your music and helps to optimise your surroundings.

Parametric control on each channel. 10dB boost or cut, adjustable, of any

frequency in the lower registers, adjustable by the frequency knob. The width or

spread of this boost or cut is also adjustable using the width knob.

16 programs of reverberation available on both channels. Programs from simple

spring reverb to more elaborate “slow deep flange with reverb”. The algorithms for

these reverbs have been developed by world famous programmers and are

available on many professional pieces of equipment. The level of the reverb added

to each channel may be adjusted independently.

Effects send and return are available to allow addition of standard effects pedals

and other outboard equipment, making your AMA-1 as fully expandible as you

wish.

The balanced DI output allows a clean signal to be sent to your main amplification

system if you are using your AMA-1 as a stage monitor. The DI output signal is

switchable from pre to post main volume control.

Headphones socket with independent volume control allows you to listen privately.

Built-in speaker stand socket on base for easy stand mounting. (Sturdy stand

should always be used)

Features:

172 Wadsley Lane, Sheffield, UK. S6 4EE +44 (0)114 220 3517

Dimensions

The AMA-1 is a compact, but powerful, acoustic amplifier.

Physical dimensions: 24cm (depth) x 26.5cm (height) x 34cm (width)

Weight: 8kg

Finish: black splatter effect.

Mains: 3 pin IEC socket with on/off switch and fuse.

(120/240 switchable, 2AT/1AT fuse)

Must only be used with mains supply that has a protective earth connection.

172 Wadsley Lane, Sheffield, UK. S6 4EE +44 (0)114 220 3517

Amplifier use

172 Wadsley Lane, Sheffield, UK. S6 4EE +44 (0)114 220 3517

Before switching on your amplifier, ensure all volume controls are at minimum

and connect all inputs and outputs.

Your instrument or microphone should be connected to input 1 or 2, each have

the same facilities so you may chose either and achieve the full use of the

amplifier.

Input 1 & 2 connectors:

These XLR/Jack input connectors will accept either 3pin male XLR connectors

or 1/4" (6.35mm) jack plugs. The input sensitivity is the same whichever

connector is used but may be switched using the 0/-20dB button. Phantom

power may be applied to the XLR connector, no effect will be noticed if the

phantom power button is on when you use the 1/4" jack connection.

Gain:

This control changes the input level taken from your instrument/microphone. To

get the most out of your amplifier it is best to use this control at as high a level

as possible whilst still maintaining the sound you want.

Frequency/width/level:

These controls adjust the parametric tone control on each channel. This control

allows you to make a tone control that operates on any frequency you desire.

First select the frequency by adjusting the FREQUENCY knob, counter-

clockwise for low frequency and clock-wise for high frequency.

Next adjust the boost or cut of this frequency using the LEVEL knob, counter-

clockwise for cut and clock-wise for boost.

Finally adjust the width of the control or the number of frequencies around the

selected frequency by adjusting the WIDTH knob, counter-clockwise for

narrower or fewer frequencies and clock-wise for wider or more frequencies.

This process may need to be repeated to optimise the effect you are trying to

achieve. This is particularly useful if the room in which you are playing or the

instrument you have has a particularly strong resonance at any frequency.

If you do not want to use this facility simply adjust the LEVEL knob to the

central position, a click stop is in the centre so it is easily found, and the filter

will have no effect.

Amplifier use cont

Bass/Mid/Treble:

This three band tone control provides boost or cut in the three bands, BASS for

low frequencies and TREBLE for the higher notes. The MID knob allows the

middle band to be adjusted in a similar manner giving a much higher degree of

control over the sound you produce.

Reverberation:

This control allows selection of the 16 in-built reverberation programs. The

numbers correspond to the list of effects on the lower front panel. Both

channels must have the same reverberation program but the level of

reverberation is independently adjustable on each channel.

Reverb Level:

This adjusts the level of reverberation on each channel, there are controls for

channel 1 for channel 2. These allow full control from zero to maximum

effect.

Power indicator:

The green LED indicates that the amplifier is on and working

correctly.

Clip indicators:

There are three CLIP indicators, one for each channel input and

one for the main output. When one of the input indicators

illuminates RED, this indicates that the input signal may be too

high and may cause the amplifier to distort. These indicators are

set to give the user plenty of warning so if the indicator only

illuminates occasionally and no distortion is heard, then there is no need to

take action. If you feel you should take action then either reduce the input by

turning down the signal arriving at the amplifier input if this is possible, i.e. if the

signal is from another device like a CD player etc. Alternatively select the “0"

Volume:

This is the main output volume control. This will adjust the output

level of both channels simultaneously. To get the best out of your

amplifier this control should be used in conjunction with the GAIN

knobs, the GAIN knobs should be as high as possible whilst still

maintaining the sound quality thus allowing the VOLUME control

to be as low as possible.

172 Wadsley Lane, Sheffield, UK. S6 4EE +44 (0)114 220 3517

position of the “0/-20dB” button.

If the output CLIP indicator illuminates RED, then the volume control knob

should be turned counter-clockwise. Again this indicator gives the user plenty of

warning that the level is approaching overload, if distortion is not heard then no

action is required but be aware that if the level increases yet further then

distortion may occur.

All clip indicators will remain unlit if a low signal is present and will illuminate

GREEN when a good working signal level is present. They will turn RED when

the signal is approaching clip level.

0/-20dB button:

This button changes the sensitivity of the input. When the button is out the

channel is in its lower sensitivity and will be quieter but will take a higher input

level, as may be expected if a CD player or similar is connected. When the

button is pressed in, the sensitivity is increased and will become louder, this is

suitable for microphones and other lower level signals.

Phantom Power button:

When pressed, this button applies 12v phantom power to the respective input,

the orange indicator is also illuminated. The two channels may have phantom

power applied independently. Phantom power is only applied to the XLR

connector, when a jack plug is connected and phantom power is on then no

power is applied to the input.

Phones socket:

This will accept standard stereo headphones, the amplifier is mono so left and

right will have the same signal.

Phones Level knob:

This will adjust the level going to headphones when connected. This control is

independent of the main volume control so the main speaker may be turned to

off and the phones may still have full volume.

Effects Send socket (FX Send):

This socket will allow connection of external effect units or pedals. This takes

the signal before the main volume control but after all other controls.

Effects Return socket (FX Rtn):

This return socket takes the signal back from the external effects unit or pedal.

DI Out socket:

This socket allows the output signal to go to an external amplification system.

The signal is taken from after all controls but before the main volume control.

Amplifier use cont

172 Wadsley Lane, Sheffield, UK. S6 4EE +44 (0)114 220 3517

Technical Specification

Dimensions:

Weight: 8kg

Finish: Black splatter effect.

Mains:

Inputs: 2 identical channels;

switchable low/high sensitivity,

balanced XLR or unbalanced 1/4" jack

Phantom power: 12v switchable on both channels.

Tone controls: Both channels identical;

Bass +/-10dB 120Hz;

Mid +/- 10dB 800Hz;

Treble +/-10dB 10kHz.

Reverberation: 16 programs available on both channels,

level independently adjustable.

DI Output: Balanced, switchable between pre/post final volume

control.

Phones: Mono feed signal pre-main volume

with independent level control

Power: 120/240AC (switched) 50/60Hz 200VA IEC socket,

lead supplied.

1amp T rated fuse must be used with 240v supply,

2amp T rated fuse must be used for 120v supply.

Must only be used with mains supply that has a protective earth connection.

Amplifier: 60watts class D amplifier.

Speaker: Full range dual cone 8" 60w 4ohm 50Hz - 19kHz.

Speaker out: Output socket to connect passive auxiliary speaker.

24cm(depth) x 26.5cm(height) x 34cm(width)

3 pin IEC socket with on/off switch and fuse.

(120/240 switchable, 2AT/1AT fuse)

Must only be used with mains supply that has a protective earth connection.

172 Wadsley Lane, Sheffield, UK. S6 4EE +44 (0)114 220 3517

Accusound AMA-1 User manual

Brand: Accusound

Model: AMA-1

Category: Home audio sets

Type: User manual

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Accusound AMA-1 User manual

Accusound AMA-1 User manual

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