APS AEON User manual

USER’S MANUAL
AEON
ACTIVE STUDIO MONITOR
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CONTENTS
page
INTRODUCTION
GENERAL INFORMATION 3
BREAK-IN TIME 3
REAR PANEL
REAR PANEL 4
SWITCHES 5
INDICATORS & PROTECTION
INDICATORS 5
PROTECTION 5
SETTING UP & POSITIONING
UNPACKING 6
POSITIONING 6
CONNECTING & STARTING 9
TECHNICAL SPECIFICATIONS
TECHNICAL SPECIFICATIONS 10
SAFETY INSTRUCTIONS
SAFETY INSTRUCTIONS 11
MISCELLANEOUS
CARE 12
BLOCK DIAGRAM 12

INTRODUCTION
Congratulations on your purchase of the APS AEON active monitor. AEON is designed to provide many years of
excellent and trouble free audio reproduction. It is most important, however, that you take a few minutes to read this
manual. It contains essential information to make you get the best from your new monitors.
General Information
AEON is a professional studio monitor for near-medium field, designed for accurate sound realization.
This loudspeaker is suitable for:
– recording studios,
– broadcasting studios,
– TV studios,
– multimedia studios,
– post production facilities,
– mastering,
– digital workstations,
– home recording studios,
– audio monitoring systems of the highest quality.
AEON monitor is a two-way active system. It has two independent power amplifiers, mounted on the rear panel, for
each: tweeter and bass/mid-range loudspeaker. There are also calibrated controls, protections, indicators, and the
input terminals.
AEON is designed for operation in stereophonic or multi-channel systems (5+1 or 7+1 and larger) such as DOLBY,
DTS, THX, etc.
Break-In time
The transducers of your APS AEON monitor will achieve better sound quality after breaking in. Especially after the
first hours of use, you may notice a significant advance in sound quality.
APS Spanily s.j.
Sikorskiego 15
62-020 Swarzędz
POLAND
tel. [phone]
fax [phone]
www.aps-company.com
e-mail: [e-mail]

REAR PANEL
Correct setup is essential to achieve optimal performance from your monitors. Please follow the instructions on the
following pages.
1
2
5
3
4
6
7
8
9

1. AC input and fuse
2. Power on/off switch
3. Input Sensitivity Switch
4. Tweeter Loudspeaker Level Switch
5. Bass Controller Level Switch
6. Bass Controller Switch
7. Ground Lift Switch
8. XLR symmetrical (balanced) output
9. XLR symmetrical (balanced) input
Switches
On the rear of the monitor you will find switches for setting up the monitor for optimum performance in different
acoustic and electric environments. Each switch is explained in the following.
3. Input Sensitivity Switch
Use this switch to match the sensitivity of AEON monitor to your source.
AEON functions together with the most common signal sources. The step switches allow you to adjust exactly the
same levels in each monitor in stereophonic or multi-channel systems.
4. Tweeter Loudspeaker Level Switch
This switch controls the higher tones. You can use it to match AEON sound with room conditions, audio monitoring
conditions or sound material.
If the surfaces of walls in the room are made of hard and smooth materials, the sound - especially the high
frequencies - can be strongly reflected and it will be too bright. In such situation it is recommended to decrease the
treble level.
You can also raise the treble if the sound is too dull.
5. Bass Controller Level Switch & 6. Bass Controller Switch
In the case of the monitors arrangement in front of a wall or if the monitor is suited in a corner of the room you should
best decrease the level of bass.
If the room is too small it is also advisable to decrease the level of bass by a few dB.
One can always decrease or increase the level of deep bass, depending on a personal taste.
Note: the Bass Controller Level Switch is active when the Bass Controller Switch is adjusted in the on position.
Bass Controller Switch allows you to switch off the Bass Controller decreasing the low bass volume whilst increasing
its speed.
7. Ground Lift Switch
It allows disconnection of the ground to the common (common of your studio equipment) if ground loops occur.
In case of a poorly earthed, and/or a great number of devices, say in a sound monitoring room, hums, interferences
and other disturbances can appear. The switch should then be adjusted in such position in which interferences do not
appear, or are the lowest.
INDICATORS & PROTECTION
Indicators
On the front you will find Three-Color LED Indicator positioned just underneath the APS logo. The blue power LED
indicates speaker on/off status.
The LED indicator flashes green when the input signal reaches a level where the limiter is activated to prevent the
internal high frequency amplifier from clipping and the tweeter from damage as well.
The LED indicator flashes red when the input signal reaches a level where the limiter is activated to prevent the
internal bass amplifier from clipping and the woofer from damage as well.
Protection
AEON monitor has several built in protection systems to reduce the risk of hazard or damage due to overloading as
well as prevent against interferences.

The tweeter is protected by an electronic Tweeter Protection System limiting overdrive of its dedicated Power
Amplifier. The Tweeter Power Amplifier is equipped with thermal, short circuit and over-current protections. There are
also interference eliminators operating during switch-on and switch-off.
The woofer is similarly protected by its own Woofer Protection System. The woofer section is also equipped with its
own thermal sensor and is protected by a specially designed Power Amplifier Controller.
The AEON loudspeakers are magnetically shielded, preventing interferences with TV screen, computer monitor
screen (e.g. disturbance of colors) or other equipment standing nearby.
There is also the Ground Lift Switch preventing against ground loops.
SETTING UP & POSITIONING
Unpacking
OK, first things first:
Prepare adequate space before taking the monitor out of the package to avoid the necessity of a hasty search for a
“piece” of table, chair or floor with your AEON in hand.
It is necessary to exercise caution while unpacking the device in order to avoid damage to the Bass/Mid-Range and
Tweeter Loudspeaker diaphragms as well as the switches mounted on the rear panel of the monitor.
Positioning
Step 1
Prepare a suitable place for each AEON monitor. They can be special supports or fastenings or also other stable
stands, pedestals, shelves or areas located in audio monitoring places.
Remark 1
The location of your monitors depends on the system: stereophonic or multi-channel systems (5+1 or 7+1 and larger).
Remark 2
For stereo, the angle between the lines connecting the listener’s face with the left and right monitor should amount to
about 60°, while the distance from each monitor should be equal.

A
A=B
B
Step 2
Install the Stick-On Feet in suitable places of the monitor base near the corners to ensure its stability.
Step 3
Put monitors in a vertical position – standing up, (although horizontal position - lying down - is also permissible), so
that the center (Tweeter Loudspeaker axis) will be located at the ear-level of the listener.
Step 4
Turn each monitor so that the Tweeter Loudspeaker will be turned in the direction of the listener.
Remark 3
The monitors can also be situated above the ear-level. In this case, it is necessary to tilt them so that the Tweeter
Loudspeaker will be turned towards the listener.

Remark 4
It is necessary to match the location of the monitor, the listener’s head and reflecting surfaces (e.g. mixer console
surface) to avoid a situation in which the reflected sound directly reaches the listener’s ears.
Illustrating: it is best to choose such a location for the monitors so that they will not be visible in a mirror put on the
mixer console halfway between the listener’s face and each monitor.
A=B
λ=β
A
λ β
B
Remark 5
The most favorable is a configuration which allows similar acoustic conditions for each channel, e.g. the same
distances of the left and right monitor from walls (from side, in the back of monitors), the same distances of the
listeners ears from walls.
Remark 6
It is worth placing the AEON away from walls, especially corners; even though the wide range of precise control
settings allows the monitors to work in practically any position.
Remark 7
It is necessary to allow some air flow behind AEON. In particular, do not put the monitor on a closed shelf or cover
the rear panel of the monitor with materials blocking dispersion of heat, e.g. sound absorbing materials, curtains, etc.

Connecting and Starting
Step 1
Adjust all regulators in 0 dBu and 0 dB positions before connecting.
Step 2
Adjust output level of signal source in the minimum position.
Remark 1
If a value of source output level is not known, then the safest method is to adjust the Input Sensitivity Switch in 30 dBu
position.
Step 3
Bass Controller Switch should be adjusted in the switch-on position, with GROUND LIFT Switch in the switch-off
position.
Step 4
Adjust the Power Switch adjustment in the switch-off position.
Step 5
Put XLR connector of the cable connected to symmetrical signal source (e.g. mixer console) into the XLR Symmetrical
Input of AEON.
Remark 2
It is possible to make use of the Big Jack Symmetrical Input using the big jack symmetrical connector or other
applying a suitable inter-connector.
Remark 3
It is also possible to connect your AEON monitor to an asymmetrical signal source. In this case one should use a
suitable inter-connector, whose connection diagrams are shown below (RCA and XLR standards).
2 1
3
Connection in case of cable – two wires in screen
2 1
3
Connection in case of cable having one wire in screen
Remark 4
The use of high quality signal connectors and cables is recommended. Solid signal connectors are a must if you want
to get the best sound performance.
Step 6
Connect the power cable to the Power Cable Socket and switch on power by means of AEON Power Switch.
Remark 5
Connecting your monitors via computer power cords is not recommended. Similarly don’t use low quality power
conditioners, etc. Using the power conditioners is not required.

Remark 6
Power cables of the monitor and a signal source connect best to the same power sockets unit.
Step 7
Adjust suitable source (e.g. mixer console) output level slowly.
Remark 7
Change the level by means of Input Sensitivity Switch especially if it was adjusted in 30 dBu position.
TECHNICAL SPECIFICATIONS
AEONActive Studio Monitor
Field Monitor
Near-medium
Type
Active – two power amplifiers:
- Tweeter p.a.: monolithic integrated circuit TDA7294
- Woofer p.a. operates on 2SA1943/2SC5200
System
Two-way
Crossover Frequency
1.5 kHz (slope: 24 dB/octave.)
Dimensions: Height ×Width ×Depth
42 cm ×27 cm ×36 cm/ 16.5’’ x 10.5’’ x 14’’
Free Field Frequency Response
±2 dB: 30 Hz ÷30 kHz
SPL in Free Field @ 1m
RMS: 108 dB
Peak: 116 dB
Weight
18 kg / 39.6 lbs.
Loudspeakers
Bass/Mid-Range Loudspeaker
φ22 cm (8 2/3’’)
Diaphragm: cellulose, surround: rubber
Magnetically shielded
Tweeter Loudspeaker
φ2.5 cm (1”) in two versions:
-Fabric dome
-Titanium dome
Magnetically shielded
Amplifiers
Bass/Mid-Range Power Amplifier
150 W RMS @ 4 Ω
Tweeter Power Amplifier
70 W RMS @ 6 Ω
THD Distortions
0.005 % – PO= 5 W, f = 1 kHz
0.1 % max – PO= 0.1 up to 50 W, f = 20 Hz up to 20
kHz
Signal to Noise Ratio
103.5 dB – weighted by A curve
101 dB – in band of 20 Hz up to 20 kHz
Input Voltage Level for 100 dB SPL In Free Field @ 1m
0 dBu (i.e. 0.775 V) – calibrated regulators in 0 dBu, 0
dB positions
Calibrated Controls
Input Sensitivity Switch
30dBu, 22dBu, 15dBu, 9dBu, 4dBu, 0dBu, -3dBu,
-10dBV
Bass Controller Level Switch
-15dB, -12dB, -9dB, -6dB, -3dB, 0dB, 3dB, 6dB