Stanton A 900, A 1800, A 2800 User Manual

A.900 / A.1800 / A.2800

HEAVY DUTY PROFESSIONAL AMPLIFIERS

USER MANUAL

IMPORTANT SAFETY INSTRUCTIONS

1. Read Instructions – All the safety and operating instructions should be read before
his product is operated.

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2. Retain Instructions – The safety and operating instructions should be retained for
uture reference.

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. Heed Warnings – All warnings on the appliance and in the operating instructions

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should be adhered to.

. Follow Instructions – All operating and use instructions should be followed.

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. Water and Moisture – The appliance should not be used near water - for exam-

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le, near a bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or

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ear a swimming pool, and the like.

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6. Wall or Ceiling Mounting – The product should be mounted to a wall or ceiling only

s recommended by the manufacturer.

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. Heat – Appliance should be situated away from heat sources such as radiators,

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heat registers, stoves, or other appliances (including amplifiers) that produce

eat.

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. Power Sources – This product should be operated only from the type of power

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source indicated on the rating label. If you are not sure of the type of power sup-

ly to your home, consult your product dealer or local power company. For prod-

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ucts intended to operate from battery power, or other sources, refer the operat­ing instructions.

. Grounding or Polarization – This product may be equipped with a polarized alter-

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nation-current line plug (a plug having one blade wider than the other). This plug

ill fit into the power outlet only one way. This is a safety feature. If you are

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nable to insert the plug fully into the outlet, try reversing the plug. If the plug

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should still fail to fit, contact your electrician to replace your obsolete outlet. Do

ot defeat the safety purpose of the polarized plug.

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0. Power-Cord Protection –Power-supply cords should be routed so that they are

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not likely to be walked on or pinched by items placed upon or against them, pay­ing particular attention to the cord in correspondence of plugs, convenience
receptacles, and the point where they exit from the appliance.

11. Cleaning - The appliance should be cleaned only as recommended by the man­ufacturer. Clean by wiping with a cloth slightly damp with water. Avoid getting
water inside the appliance.

12. For AC line powered units - Before returning repaired unit to user, use an ohm­meter to measure from both AC plug blades to all exposed metallic parts. The
resistance should be more than 100,000 ohms

13. Non-use Periods –The power cord of the appliance should be unplugged from
the outlet when left unused for a long period of time.

14. Object and Liquid Entry – Care should be taken so that objects do not fall and
liquids are not spilled into the enclosure through openings

15. Damage Requiring Service – The appliance should be serviced by qualified serv-

ice personnel when:

A. The power-supply cord or the plug has been damaged; or

B. Objects have fallen, or liquid has been spilled into the appliance; or
C. The appliance has been exposed to rain; or

D. The appliance does not appear to operate normally or exhibits a marked

change in performance; or

E. The appliance has been dropped, or the enclosure is damaged.

16. Servicing –Do not attempt any service to the appliance beyond that described in
he operating instructions. All other servicing should be referred to qualified serv-

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ice personnel.

7. Ventilation – Slots and openings in the cabinet are provided for ventilation and

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o ensure reliable operation of the product and to protect it from overheating, and

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these openings must not be blocked or covered. The openings should never be

locked by placing the product on a bed, sofa, rug, or other similar surface. This

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roduct should not be placed in a built-in installation such as a bookcase or rack

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unless proper ventilation is the manufacturer’s instructions have been adhered

o.

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18. Attachments – do not use attachments not recommended by the product manu­acturer as they may cause hazards.

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9. Accessories – Do not place this product on an unstable cart, stand, tripod, brack-

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et, or table. The product may fall, causing serious injury to a child or adult, and

erious damage to the product. Use only with a cart, stand, tripod, bracket, or

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able recommended by the manufacturer, or sold with the product. Any mounting

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of the product should follow the manufacturer’s instructions, and should use a

ounting accessory recommended by the manufacturer.

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20. Lightning – For added protection for this product during a lightning storm, or

when it is left unattended and unused for long periods of time, unplug it from the

all outlet and disconnect the antenna or cable system. This will prevent dam-

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age to the product due to lightning and power-line surges.

1. Replacement Parts – When replacement parts are required, be sure the service

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echnician has used replacement parts specified by the manufacturer or have

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the same characteristics as the original part. Unauthorized substitutions may

esult in fire, electric shock, or other hazards.

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22. Safety Check – Upon completion of any service or repairs to

this product, ask the service technician to perform safety
checks to determine that the product is in proper operating
condition.

23.This product is in compliance with EU WEEE regulations.

Disposal of end of life product should not be treated as
municipal waste. Please refer to your local regulations for
instructions on proper disposal of this product.

24. Carts and Stands – The appliance should be used only with

a cart or stand that is recommended by the manufacturer. An
appliance and cart combination should be moved with care.
Quick stops, excessive force, and uneven surfaces may
cause the appliance and cart combination to overturn.

25. This device complies with Part 15 of the FCC Rules. Operation is subject to the

following two conditions: (1) this device may not cause harmful interference,
and (2) this device must accept any interference received, including interference
that may cause undesired operation.”

CAUTION: To reduce the risk of electric shock, do not remove any
cover. No user-serviceable parts inside. Refer servicing to quali­fied service personnel only.

The lightning flash with arrowhead symbol within the equilateral triangle is intended to alert the user
to the presence of un-insulated “dangerous voltage” within the product’s enclosure that may be of suf­ficient magnitude to constitute a risk of electric shock.

The exclamation point within the equilateral triangle is intended to alert the user to the presence of
important operation and maintenance (servicing) instructions in the literature accompanying this appli­ance.

CAUTION: To prevent electric shock, do not use this polarized plug with an extension cord, receptacle or other out­let unless the blades can be fully inserted to prevent blade exposure.

INTRODUCTION

Thank you for your decision to purchase Stanton’s innovative new A Series professional power amplifier! Engineered for superior sound
reproduction, the A Series line of professional amplifiers deliver top quality audio at an affordable price. The A Series offer a standard of

eliability and efficiency that makes them the perfect solution for every DJ, musician, and sound engineer. Welcome to a new level of pro-

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fessional quality sound performance!

UNPACKING & INSTALLATION

Although it is neither complicated to install, nor difficult to operate your amplifier, a few minutes of your time are required to read this
manual for a properly wired installation, and to become familiar with the unit’s features. Please take great care in unpacking the unit and
do not discard the carton and other packing materials. They may be needed when moving the unit and are required if it ever becomes
necessary to return the unit for service. Never place the unit near a radiator, in front of heating vents, in direct sunlight, in excessive
humidity, or dusty locations to avoid damages and to guaranty a long reliable use. Connect the unit with the system components accord­ing to the description on the following pages.

FEATURES

• Stanton amplifiers deliver the following power ratings.

• A.900 - 2 x 210 Watts at 8 ohm, 2 x 320 Watts at 4 ohm and 2 x 420 Watts at 2 ohm

• A.1800 - 2 x 400 Watts at 8 ohm, 2 x 600 Watts at 4 ohm and 2 x 900 Watts at 2 ohm

• A.2800 - 2 x 600 Watts at 8 ohm, 2 x 900 Watts at 4 ohm and 2 x 1400 Watts at 2 ohm

• 2-channel, parallel or bridged mono operating modes for flexible application 900 Watts for A.900, 1800 Watts for A.1800 and 2800
Watts for A.2800

• Independent limiters for each channel reduce distortion

• Independent input level controls for each channel allow precision adjustments

• Precise signal and clip LED indicators to monitor performance, allow you to correct for overloading (clipping) condition

• Low-frequency filters (40 Hz) remove rumble and subsonic frequencies

• Twin-tunnel and two temperature-sensitivity forced-air cooling system to maintain a low operating temperature during use

• Balanced XLR or balanced 1/4-inch TRS Combination input connector for each channel and LINK ports

• 5-way output binding posts or Speakon® connectors enable secure operation

• High-current toroidal transformer for absolute reliability

• Independent DC and thermal overload protection on each channel automatically protects amplifier and speaker from damage or failure

• The A-Series can be mounted in any standard 19” rack

FRONT PANEL CONTROLS

1. Rack Ears

These ears are used to mount the amplifier in any standard 19”
rack.

2. Fan Vent

The A-Series amplifiers are cooled by two rear-mounted fans
(except for A.900 which is cooled by a single rear mounted fan).
Cool air flows through the front fan filters, reducing the tempera­ture internal components while forcing the heat out the rear vents.
Never block these vents and keep them clean at all time.

3. AC Power Switch

This switch powers the unit on and off.

4. Signal Indicators

These blue LED's will illuminate to indicate that a signal is pres­ent at the amplifier input, and that the signal is being amplified.

5. Clip Indicators

These red LED's will illuminate at the clipping threshold. These
lights should not light up during normal use as they indicate sig­nal outside of the amplification range of the amplifier. When a sig
nal is "clipped" and the clip indicator illuminates, it means that the
signal is being distorted at the output stage. Prolonged clipping
can not only damage your amplifier, but also your speakers, so be
careful to monitor the clip indicator during setup and use. If the
clip indicator is illuminated then simply lower the channel gain or
input signal until the indicator does not light.

6. Active Indicators

These blue LED's indicate that AC power is connected and the
amplifier is turned on.

7. Protect Indicators

These red LED's indicate that the channel is in Protect mode.
When the channel goes into protect mode all output for that chan­nel will be muted. The protect LED's light when overheating or
other severe problems occur. This is to protect any speakers con­nected to the channel. The LED's also light for approximately five
seconds whenever the unit is powered on and fade slowly when
the amplifier is powered off.

8. Channel input level control

These two 21-position detented potentiometers adjust input level
for their respective amplifier channels. In Bridged Mono Mode,
only channel 1 level control are used to adjust signal level. In
Parallel Mode, both input level control are used to adjust signal

­level for their respective amplifier channels. At their fully counter­clockwise position, the signal is attenuated by more than 80dB. At
their fully clockwise position, the signal is at unity gain. When 0
dBu of signal arrives at the input jacks and the Channel input level
controls are set to their fully clockwise position, the unit delivers
full power output.

REAR PANEL CONTROLS

1. Fan

This is a variable speed cooling fan. Cool air enters the amplifier
through the fan filters located on the front of the amplifier. Be sure
not to block these ports when installing the amplifier or other
equipment.

2. Input connectors

Connect the input source to the balanced combo connectors
using either XLR or 1/4” TRS plugs. They are configured as fol­lows : Pin 2 (Tip) hot, Pin 3 (Ring) cold, and Pin 1 (Sleeve)
ground. We recommend using balanced three-conductor cabling
wherever possible. Unbalanced two-conductor 1/4” plugs can
also be inserted into these inputs, but you will get better signal
quality and less outside noise and hum if you use balanced lines.
Stereo signal should be connected to both the Channel 1 and
Channel 2 input jacks. When operating the unit in Bridged Mono
or Parallel modes, use the Channel 1 input jack only.

3. Link connectors

These jacks are used to send a parallel signal to another device
or amplifier.

4. High Pass Filter (HPF) switch.

These switches are used to activate the built-in High Pass Filter.
The HPF rolls off signals below 40Hz. This improves bass per­formance by limiting sub-audio cone motion, making more power
available for the speaker’s rated frequency range. When the filter
is turned off, a 5 Hz roll off protects against DC or deep sub-audio
inputs.

7. 5-way Binding Post

Connect each channel of the unit to 4 ohms or 8 ohms loudspeak­ers.Two pairs of 5-way binding posts are provided for each chan­nel, so that paralleling of speakers is possible. Connection to the
binding posts can be made with bare wire, banana plugs, or
spade lug terminations. Make connections to both the Channel 1
and Channel 2 terminals for Stereo or Parallel Mode, or a single
connection across the red terminals only of Channel 1 and
Channel 2 for Bridged Mono Mode.

8. Speakon® output connectors

You can use these to connect each channel of the unit to 8 ohms
or 4 ohms loudspeakers. Using Speakon® speaker cables, make
connections to both the channel 1 and channel 2 connectors for
Stereo or Parallel Mode, or to the Bridged mode connector for
Bridged Mono Mode.

9. Circuit breaker

The breaker acts in place of common disposable fuses. This cir­cuit breaker will trip if there is a fault with the main voltage or if
maximum output is exceeded. Simply depress the circuit breaker
and power up the unit again.

10. AC input

IEC connector for AC power cable. Connect the supplied heavy­gauge 3-pin IEC power cable.

5. Limiter switch

When the input signal connected to your amplifier is too high, you
end up with a distorted output signal. To prevent this, both chan­nels feature a clip limiter that can be engaged or disengaged
selectively.

6. Bridge / Stereo / Parallel switch

This switch changes the amplifier operating mode between
stereo, mono bridged, and parallel.