User manual
IMPORTANT SAFETY INSTRUCTIONS
When using this electronic device, basic precautions should always be taken, including the
following:
1. Read all instructions before using the product.
2.Do not use this product near water (e.g., near a bathtub, washbowl, kitchen sink, in a wet
basement, or near a swimming pool.etc).
3.This product should be used only with a cart or stand that will keep it level and stable and
prevent wobbling.
4.This product, in combination with headphones or speakers, may be capable of producing
sound levels that could cause permanent hearing loss. Do not operate for a long period of
time at a high volume level or at a level that is uncomfortable. If you experience any hearing
loss or ringing in the ears, you should consult an audiologist.
5.The product should be positioned so that proper ventilation is maintained.
6.The product should be located away from heat sources such as radiators, heat vents, or other
devices (including amplifiers) that produce heat.
7.The product should be connected to a power supply only of the type described in the
operating instructions or as marked on the product. Replace the fuse only with one of the
specified type, size, and correct rating.
8.The power supply cord should: (1) be undamaged, (2) never share an outlet or extension
cord with other devices so that the outlet's or extension cord's power rating is exceeded, and
(3) never be left plugged in to the outlet when not being used for a long period of time.
9.Care should be taken so that objects do not fall into, and liquids are not spilled through, the
enclosure's openings.
10. The product should be serviced by qualified service personnel if:
A.
The power supply cord or the plug has been damaged.
B.
Objects have fallen into, or liquid has been spilled onto the product.
C.
The product has been exposed to rain.
D.
The product does not appear to operate normally or exhibits a marked
change in performance.
E.
The product has been dropped, or the enclosure damaged.
11. Do not attempt to service the product beyond what is described in the user maintenance
instructions.
All other servicing should be referred to qualified service personnel.
CONTENTS:
Before you start
What's in the box
Features
Hints on installation
4
4
4
Controls and connections
Front panel
Rear panel
5
5
Specifications
Power Specifications
General Specifications
8
8
Congratulations on your choice of stereo power amplifiers - you have purchased one of the finest
stereo amplifiers on the market today. This unit was developed using the expertise of professional sound
engineers and working musicians. You will find that your new A Series has superior performance and
greater flexibility than any other amplifiers in its price range. Please read this manual carefully to get the
most out of your new unit. Thanks for selecting A Series as your choice in stereo power amplifiers.
What’s in the box?
Items that are included in the box:
•
•
•
A Series amplifier
Instruction manual
Power cable
Features
• Full operating features: volume controls;
balanced phoenix connectors, screw terminal
speaker connectors, stereo/bridge mode.
• Power ON, Clip, Signal, and Protect LED
indicators for each channel.
• Full safety/reliability features: 2 variable speed
fans for cooling; DC and thermal overload
protection; short circuit and speaker protection.
• Roadworthy, rugged double rack space (1 U)
housing -115VAC 60Hz, -230VAC 50Hz select
switch and IEC.
Hints on Installation
To ensure years of enjoyment from your A Series, please read and understand this manual thoroughly before
using the unit.
INSPECTION
Your A Series was carefully packed at the factory in packaging designed to protect the units in shipment.
Before installing and using your unit, carefully examine the packaging and all contents for any signs of
physical damage that may have occurred in transit.
(Note: A Series is not responsible for shipping damage. Remove if the unit is damaged, do not return to us, but
notify your dealer and the shipping company immediately to make a claim. Such claims must be made by the
consignee in a timely manner.)
RACK MOUNTING
The A Series amplifiers are designed for standard 19" rack mounting as well as "stack" mounting without
a cabinet. Use 4 screws and washers for mounting to the front rack rails. It is also a good idea to support
the amps also in the rear, especially for mobile use where the amps will be subjected to shocks.
AMPLIFIER COOLING
Also pay close attention to the cooling requirements. Never block the air vents in the back, side and front
of the amplifier if the load seen by amplifier is less than 4 ohms and the amplifier is being run at high
output levels. For best results, in such high output power applications you should augment the amplifier's
air flow with a rack cooling system.
Front Panel
1. POWER SWITCH
To turn the unit ON or OFF, press the upper or bottom
portion of this button. Before turning on the amplifier, check
all connections and turn down the level controls. A
momentary muting is normal when turning the amplifier on
or off.
(Caution: Always turn on your power amplifier last, after all
your other connected equipment, and always turn off your
power amplifier before your other connected equipment.)
2. POWER LED INDICATORS
These LEDs illuminate when the power is turned "ON".
3. PROTECT LED INDICATORS
These LEDs illuminate if the power amplifiers output
connection is shorted or the load impedance is too low.
When either of these LEDs is lit up, turn OFF the power and
check the output's connection to verify that it is correct, then
turn ON the power again.
4. SIGNAL LED INDICATORS
These LEDs illuminate to confirm the presence of an input
signal greater than 100 mV at that channel of the amplifier
5. CLIP LED INDICATORS
These LEDs illuminate if any section of the power amplifier's
output are within 3dB of clipping. Occasional blinking of the
LEDs are acceptable, but if they remain on more than
intermittently you should turn down either the power
amplifier s level controls or reduce the output level of the
preceding component to avoid audible distortion.
6. LEVEL CONTROLS
These control the level of signal coming into each channel.
The actual voltage gain of the amplifier is shown in dB. Turn
these controls counter clockwise if the peak LEDs illuminate
steadily (indicating too strong an input signal).
Rear Panel
7. POWER CONNECTOR
The cord connector is used to connect the AC power source
to your power amplifier. (CAUTION: DO NOT REMOVE THE
CENTER GROUNDING PIN.)
8. FUSES
Fuse holders for T2A-6.3A/250V fuses. If these fuses
continuously. Blow, shut off the unit and have it serviced by
qualified service personnel.
9. AC VOLTAGE SELECTOR SWITCH
Before plugging in the power cord, check to see that the unit
is set for the proper voltage for your area: ~115V (60Hz) or
230V (50Hz).
10. OUTPUT CONNECTORS
Connect to your speakerbox.
11. MODE SELECTOR
This button allows select the stereo or bridge
configuration. If bridge mode is selected, the minimum
loudspeakers impedance should be no less then 8Ω.
12. INPUT CONNECTORS
Connect your input signal to these balanced phoenix
connectors.
12. FANS
The fan speed is varied continuously and automatically to
maintain the proper internal operating temperature.
Specifications
4Ω / EIA 1 kHz / 0.1% THD (Stereo mode)
8Ω / EIA 1 kHz / 0.1% THD (Stereo mode)
8Ω / EIA 1 kHz / 0.1% THD (Bridge mode)
Input Sensitivity
Input Impedance
Frequency Response
Distortion (SMPTE-IM)
Signal to Noise Ratio (20 Hz - 20 kHz) 8Ω
Damping Factor (1 kHz and below)
General specifications
Amplifier Protection
Load Protection
Controls
Indicators
Connectors (each channel)
Power Requirements
Fuses
Dimensions (HxWXD)
Weight - Net
A100
100W
70W
200W
A200
200W
130W
400W
0.775 Vrms (0 dBu)
10kΩ unbalanced
25 Hz - 25 kHz: ±1 dB
5 Hz - 50 kHz: ±3 dB
< 0.03%
> -100 dB
> 400 at 8Ω
Full short circuit, open circuit, thermal. Stable into
reactive or mismatched loads
Turn-on/off muting, current limiter
Front: AC switch, channel 1 & 2 volume knobs
Power-on: Blue LED / Signal: Green LED (1 per channel)
/ Clip: Red LED (1 per channel) Protect: Red LED
Input: balanced Phoenix
Output: Screw terminals
Selectable: 115V AC 60Hz / 230V AC 50Hz
AC115V:T4A/250V
AC115V:T10A/250V
AC230V:T2A/250V
AC230V:T5A/250V
45x482x320mm (1.73"x19.0"x12.6")
8.0 kg
8.3 kg
The specifications above are correct at the time of printing of this manual. For improvement purposes, all
specifications for this unit, including design and appearance, are subject to change without prior notice.
2
AMC is a registered trademark of AMC Baltic www.amcpro.lt
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