Beale Xpress A4X40 Manuale utente

A4X40

Class D 4 Channel x 40W Amplifier

User Guide

CHANNELS CHANNELS

CH 1&2

BRIDGE

CH 3&4

BRIDGE

• Explanation of Graphical Symbols

The lightning flash with arrowhead symbol, within an equilateral triangle, is

intended to alert you to the presence of uninsulated “dangerous voltage” within

the product’s enclosure that may be of sufficient magnitude to constitute a risk of

electric shock to persons.

The exclamation point within an equilateral triangle is intended to alert you to the

presence of important operating and maintenance (servicing) instructions in the

literature accompanying the product.

APPLICABLE FOR USA, CANADA OR WHERE

APPROVED FOR USAGE

CAUTION: TO PREVENT ELECTRIC SHOCK,

MATCH WIDE BLADE PLUG TO WIDE SLOT,

INSERT FULLY.

ATTENTION: POUR EVITER LES CHOCS

ELECTRIQUES, INTRODUIRE LA LAME

LA PLUS LARGE DE LA FICHE DANS LA

BORNE CORRESPONDANTE DE LA PRISE ET

POUSSER JUSQU AU FOND.

RISK OF ELECTRIC SHOCK

DO NOT OPEN

RISQUE DE CHOQUE ÉLECTRIQUE

N'OUVREZ PAS

CAUTION: To reduce the risk of electric shock, do not remove cover (or back).

No user-serviceable parts inside. Refer servicing to qualified service personnel.

1. Read these instructions.

2. Keep these instructions.

3. Heed all warnings.

4. Follow all instructions.

5. Do not use this apparatus near water.

6. Clean only with a dry cloth.

7. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.

8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.

9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding-type plug has

two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an

electrician for replacement of the obsolete outlet.

10. Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.

11. Only use attachments/accessories specified by the manufacturer.

12. Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus. When a cart is used, use caution when moving the

cart/apparatus combination to avoid injury from tip-over.

13. Unplug this apparatus during lightning storms or when unused for long periods of time.

14. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is

damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been

dropped.

15. The apparatus shall not be exposed to dripping or splashing and that no objects filled with liquids, such as vases, shall be placed on the apparatus.

16. CAUTION: Servicing instructions are for use by qualified service personnel only. To reduce the risk of electric shock, do not perform any servicing other than that

contained in the operating instructions unless you are qualified to do so.

17. WARNING: To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture.

18. Where an appliance coupler is used as the disconnect device, the disconnect device shall remain readily operable.

19. CAUTION: Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type.

PORTABLE CART WARNING

Important Safety Instructions

Table of Contents

Important Safety Instructions ........................................................................2

Table of Contents .............................................................................................3

Introduction......................................................................................................4

Features............................................................................................................5

What’s Included ...............................................................................................5

Front Panel Features .......................................................................................6

Rear Panel Features.........................................................................................7

Installation .......................................................................................................8

Shelf Mount...................................................................................................................8

Speaker Wire.................................................................................................................9

Connections....................................................................................................10

Four Channel.............................................................................................................. 10

Three Channel With Audio Bus.............................................................................11

Two Channel Bridged Mode...................................................................................12

Trigger Input............................................................................................................... 13

AC Select/Fuse .......................................................................................................... 13

Operation/Settings........................................................................................14

ON/OFF........................................................................................................................ 14

Volume ........................................................................................................................ 14

Flat ................................................................................................................................14

Freq............................................................................................................................... 14

Bridge/Stereo ............................................................................................................15

Specifications.................................................................................................16

Limited Warranty...........................................................................................17

Notes...............................................................................................................18

Introduction

Congratulations and thank you for purchasing the Xpress A4X40 multi-channel,

multi-purpose amplifier!

The A4X40, keeping in line with several other Xpress amplifiers, may be small in

physical appearance, but has more tricks up its sleeve than a magician at a state fair!

The A4X40 is a Class D, 4 Channel x 40 Watts amplifier that when properly installed,

runs cool under almost any load.

First trick...the A4X40 can be setup as a four channel amp that can be used for two

discreet audio zones. It can be setup as a three channel amp with one stereo pair and

a high power sub. It can also be setup as a two channel amp in a high power stereo

bridged mode configuration.

Next trick...the A4X40 features selectable bandpass that allows selecting a Low Pass,

High Pass or Flat setting to contour the speaker level out specifically for the given

application. That is, let’s say the A4X40 is setup in a three channel (2.1) configuration.

The bandpass switch allows the stereo speakers connected to Channels 1 & 2 to be

set to a high pass for high bass/low mids to high frequency output, while the sub,

connected to bridged Channels 3 & 4, gets a separate low pass setting for low mids

to low bass. And...drum roll please...the low pass and high pass settings each have

their own adjustable crossover to fine-tune the system for the given speakers and

room conditions!

For an extra touch of magic, the A4X40 is audio-sensing so anytime an audio signal

hits any one of the A4X40 inputs, the amp will instantly turn ON. The amp will also

turn itself OFF if no audio signal is present for 15 minutes. There is also a 12VDC

Trigger Input that will turn the A4X40 ON when 12-24VDC is applied and turn the

amp OFF when the voltage is removed for additional control trickery, if desired.

The A4X40 is the perfect match for many applications and is always ready for new

tricks, (other applications not mentioned in the manual, just in case the ‘magician at a

state fair’ reference got lost somewhere along the way).

Please read and follow the instructions in this User Guide to assure you are getting

the most from your new Xpress a4X40 Digital 4 Channel Amplifier.

Thank you again for choosing Xpress!

Features

• Compact Size...Fits Almost Anywhere

• Cool, Efficient Digital Design

• Multiple Input and Output Configurations

• Audio Bus IN

• High Power Bridged Speaker OUT

• Audio Inputs - 2 x Stereo Line Level IN or 1 x Stereo Line Level Bus IN

• Speaker Outputs - 4ch x 40W; 2ch x 40W + 1ch x 80W; 2ch x 80W

• 2Ω Stable - Stereo Mode

• 4Ω Stable - Bridged Mode

• Volume Controls For Each Stereo/Bridged Speaker Pair

• Adjustable Crossover Frequency

• Low Pass, High Pass, Full Band Switch

• Audio Sensing

• 12/24VDC ON/OFF Trigger Input

• 110/220V Switchable

What’s Included

1 - A4X40 Amplifier

1 - AC Power Cord

1 - User Guide

This is the stuff on the front panel...

CHANNELS CHANNELS

CH 1&2

BRIDGE

CH 3&4

BRIDGE

1 2 3 4 56789

1. LEVEL (CHANNEL 1 & 2) - Adjusts the volume to the speakers connected to the CH1 and

CH2 Speaker OUTs. RANGE: MIN (OFF/Turn it up!) to MAX (Can you hear me now?)

2. FREQ (CHANNEL 1 & 2) - Sets the frequency above or below where audio content will pass

to the speakers connected to the CH1 and CH2 Speaker OUTs when the LPF (Low Pass

Filter) or HPF (High Pass Filter) is engaged. See: LPF/HPF below.

RANGE: 40 Hz to 160 Hz.

3. FLAT (CHANNEL 1 & 2) - Sets the crossover mode to which audio content will pass to the

CH1 and CH2 Speaker Outs.

LPF - Low Pass Filter. When set to LPF, audio content will pass to the speakers connected

to the CH1 and CH2 Speaker OUTs below the frequency set with Channel 1 & 2 FREQ.

FULL - Full Band. When set to FULL, audio content will pass to the speakers connected

to the CH1 and CH2 Speaker OUTs at the full bandwidth of the audio content (within of

course the 20 Hz to 20 kHz capability of the A4X40).

HPF - High Pass Filter. When set to HPF, audio content will pass to the speakers

connected to the CH1 and CH2 Speaker OUTs above the frequency set with Channel 1 & 2

FREQ.

4. CH 1/2 BRIDGE/STEREO (CHANNEL 1 & 2) - Sets the CH1 and CH2 Speaker OUTs to

normal stereo mode or Bridged mono mode. (Bridged/Mono mode = CH1 and CH2 INPUTs

summed/mono using both CH1 and CH2 Speaker OUTs for high power output.)

5, 6, 7, 8. CHANNEL 3 & 4 - LEVEL, FREQ, FLAT, MONO/STEREO settings as described above

but relative to the CH3 and CH4 INPUTs and Speaker OUTs.

9. POWER - One, green LED. Illuminates solid green when A4X40 is connected to AC power

and an audio signal is being played. The LED is OFF when the amp is in standby, (connected

to AC power, no audio signal being played).

Front Panel Features

This is the stuff on the rear panel...

1 2 3 4 5 6 7

1. AC MAINS - One, two-prong socket. Use the supplied 2-pin ground power cable to connect

the unit to an unswitched external AC power supply.

2. POWER - One, switch. Set to AUTO position to turn power to the amp ON (Standby) and

enable audio sensing. Set to OFF position to turn power to the amp OFF.

3. AC SELECT - One, switch. Select either 110V-120V or 220V-240V as appropriate for local

AC line voltage. Please confirm local voltage prior to use or making changes to the setting.

4. SPEAKER OUT - Two, four-position plug-in screw terminals. One outputs speaker level

audio to CH1 and Ch2 speakers the other outputs speaker level audio to CH3 and Ch4

speakers. Using 16AWG (min) speaker wire, connect to the appropriate speaker terminals.

Before connecting the speaker wire to the amp and speakers, twist the ends of the

speaker wire so there are no strays that can cause shorts. See section: ‘Connections’ for

information regarding normal power stereo/high power bridged connections.

5. TRIGGER - One, 3.5mm mini jack. Connect to the DC voltage Control OUT on a

preamplifier, audio processor or other device to automatically turn the A4X40 ON/OFF.

When DC voltage is applied, the A4X40 will turn ON. When DC voltage is removed, the

A4X40 will turn OFF. RANGE: +12 to +24V DC. POLARITY: Tip: +VDC, Sleeve: GND.

6. BUS SWITCH - One, switch. When set to the OFF position, Channels 1, 2, 3, 4 pass

through to their respective Speaker Outs. Channels 1/2 can be left/right audio for one

zone and channels 3/4 can be left/right for a second zone. In the ON position, Channel 1

is passed through to the Channel 3 Input and Channel 2 is passed through to the Channel

4 Input. In this configuration two stereo zones can play the same source. The BUS Switch

can also be used to feed Channel 1/2 Input to Channel 3/4 with Channels 3/4 set to

Bridged mode for a high power sub OUT. See section: ‘Connections’ for options.

7. INPUT - Four, RCA jacks. Can be configured as four mono, two stereo or two stereo BUS

audio sensing line level audio inputs. A4X40 will turn ON when a line level audio signal is

present on any jack. Amp will turn OFF after 15 minutes of no audio signal. See section:

‘Connections’ for options.

Rear Panel Features

SHELF MOUNT

The A4X40 can be conveniently mounted on a shelf top in a cabinet, closet, or even out in the

open!

• Leave room for wires.

• Allow adequate space for airflow.

• Do not set objects on top of the amp.

• Do not block vent holes on the bottom of the amplifier.

CHANNELS CHANNELS

CH 1&2

BRIDGE

CH 3&4

BRIDGE

Shelf

Installation

SPEAKER WIRE

The A4X40 is a flexible multi-channel amplifier capable of many different applications. Please

review the information below and apply these guidelines to your particular application(s).

MULTI-ZONE AUDIO

If the A4X40 is being used with a multi-zone preamp/controller then pull home-runs of

speaker wire directly from the speaker locations, or speaker terminal plates, to the amplifier

location. Use quality stranded speaker wire based upon the 4/8Ω Speaker Wire Gauge Table

below.

MULTI-ROOM AUDIO - STEREO OR BRIDGED

If the amp is being used to distribute audio from the A4X40 to rooms with individual room

volume controls, pull speaker wire from each speaker to the volume control location in each

room and then home-runs from each volume control to the amplifier location. Use quality

stranded speaker wire based upon the 4/8Ω Speaker Wire Gauge Table below.

4/8Ω SPEAKER WIRE GAUGE

SPEAKER WIRE LENGTH SPEAKER WIRE GAUGE

150’ (46m) 16 AWG

400’ (122m) 14 AWG

1000’ (305m) 12 AWG

Installation

Connections

The A4X40 can be configured for a variety of applications. For the purpose of this User Guide,

we will feature three. One as four channel amp, (two stereo sources x two stereo zones) one

as a three channel amp, (normal power stereo plus a bridged high-power sub channel) and

one as a two channel stereo amp with two bridged high power zones.

FOUR CHANNEL (Two Stereo Sources x Two Stereo Zones)

Beale Street Audio

In Ceiling Speakers

Beale Street Audio

In Ceiling Speakers

Zone 1 Zone 2

Zone 1 Audio Source

Zone 2 Audio Source

A4X40 Amplifier

BUS Switch OFF

Stereo Stereo

This illustration shows a typical multi-room system with two stereo audio sources and two

stereo audio zones. The sources can be individual devices or the output of an audio matrix

switcher or other multi-source controller.

SOURCE CONNECTIONS

1. Connect the Zone 1 Audio Source left channel line OUT to the A4X40 CH1 INPUT.

2. Connect the Zone 1 Audio Source right channel line OUT to the A4X40 CH2 INPUT.

3. Connect the Zone 2 Audio Source left channel line OUT to the A4X40 CH3 INPUT.

4. Connect the Zone 2 Audio Source right channel line OUT to the A4X40 CH4 INPUT.

SPEAKER CONNECTIONS

1. Connect A4X40 CH1+/- to the +/- terminals on the left channel speaker for Zone 1.

2. Connect A4X40 CH2+/- to the +/- terminals on the right channel speaker for Zone 1.

3. Connect A4X40 CH3+/- to the +/- terminals on the left channel speaker for Zone 2.

4. Connect A4X40 CH4+/- to the +/- terminals on the right channel speaker for Zone 2

SWITCH SETTINGS

1. Set both Front Panel Bridge/Stereo switches to Stereo.

2. Set the Rear Panel BUS Switch to OFF.

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