Extron electronics XPA Ultra Series Manuale utente

User Guide

XPA U 3502

XPA Ultra Series

Half-Rack Audio Power Ampliﬁer

68‑3545‑01 Rev. A

05 21



Trademarks

All trademarks mentioned in this guide are the properties of their respective owners.

The following registered trademarks (®), registered service marks (SM), and trademarks (TM) are the property of RGBSystems, Inc. or Extron (see the

current list of trademarks on the Terms of Use page at www.extron.com):

Registered Trademarks (®)

Extron, Cable Cubby, ControlScript, CrossPoint, DTP, eBUS, EDID Manager, EDID Minder, eLink, Flat Field, FlexOS, Glitch Free, GlobalConfigurator,

GlobalScripter, GlobalViewer, Hideaway, HyperLane, IPIntercom, IPLink, KeyMinder, LinkLicense, LockIt, MediaLink, MediaPort, NAV,

NetPA, PlenumVault, PoleVault, PowerCage, PURE3, Quantum, ShareLink, Show Me, SoundField, SpeedMount, SpeedSwitch, StudioStation,

SystemINTEGRATOR, TeamWork, TouchLink, V‑Lock, VideoLounge, VN‑Matrix, VoiceLift, WallVault, WindoWall, XPA, XTP, XTPSystems, and ZipClip

Registered Service Mark(SM) : S3 Service Support Solutions

Trademarks (™)

AAP, AFL (Accu‑RATEFrameLock), ADSP(Advanced Digital Sync Processing), AVEdge, CableCover, CDRS(ClassD Ripple Suppression),

CodecConnect, DDSP(Digital Display Sync Processing), DMI (DynamicMotionInterpolation), DriverConfigurator, DSPConfigurator, DSVP(Digital

Sync Validation Processing), EQIP, Everlast, FastBite, Flex55, FOX, FOXBOX, IP Intercom HelpDesk, MAAP, MicroDigital, Opti‑Torque,

PendantConnect, ProDSP, QS‑FPC(QuickSwitch Front Panel Controller), RoomAgent, Scope‑Trigger, SIS, SimpleInstructionSet, Skew‑Free,

SpeedNav, Triple‑Action Switching, True4K, True8K, Vector™ 4K, WebShare, XTRA, and ZipCaddy

FCC Class B Notice

NOTE: 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.

This equipment has been tested and found to comply with the limits for a Class B digital

device, pursuant to part15 of the FCC rules. These limits provide reasonable protection

against harmful interference in a residential installation. This equipment generates, uses,

and can radiate radio frequency energy and, if not installed and used in accordance with

the instructions, may cause harmful interference to radio communications. There is no

guarantee that interference will not occur. If this equipment does cause interference to radio

or television reception, which can be determined by turning the equipment off and on, you

are encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that to which the

receiver is connected.

• Consult the dealer or an experienced radio/TV technician for help.

In order to maintain compliance with FCC regulations, shielded cables must be used with

this equipment. Operation with non-approved equipment or unshielded cables is likely to

result in interference to radio and TV reception. The user is cautioned that changes and

modifications made to the equipment without the approval of the manufacturer could void

the user’s authority to operate this equipment.

NOTE: For more information on safety guidelines, regulatory compliances, EMI/EMF

compatibility, accessibility, and related topics see the Extron Safety and Regulatory

Compliance Guide on the Extron website.

Regulatory Notice

WARNING: Potential risk of severe injury or death.

AVERTISSEMENT : Risque potentiel de blessure grave ou de mort.

• The circuit breaker used for this connection should be rated no lower than 20

amps and no greater than 30 amps.

• El disyuntor utilizado para esta conexión no debe tener una capacidad nominal

de entre 20 y 30 amperios.

• This product is intended for indoor use and dry environment only. The device

must not be exposed to dripping or ingress of water and that other objects filled

with liquids, su h as glasses, should be placed on the apparatus.

• Este producto está diseñado para uso en interiores y ambientes secos

únicamente. El dispositivo no debe exponerse a goteos ni a la entrada de agua y

deben colocarse sobre el aparato otros objetos llenos de líquido, como vasos.

• XPA Ultra series are Class I products and must be connected to the MAINS

outlet ELECTRICAL with a protective ground connection.

• La serie XPA Ultra son productos de Clase I y deben conectarse a la toma de

corriente ELÉCTRICA con una conexión a tierra de protección.

• Where a mains plug or appliance connector is used as the disconnecting device,

the disconnecting device must remain easily operative.

• Cuando se utilice un enchufe de red o un conector de aparato como dispositivo

de desconexión, el dispositivo de desconexión debe permanecer operativo

fácilmente.

Conventions Used in this Guide

Notifications

The following notifications are used in this guide:

DANGER:

• Will result in serious injury or death.

• Entraînera des blessures graves ou la mort.

WARNING: Potential risk of severe injury or death.

AVERTISSEMENT : Risque potentiel de blessure grave ou de mort.

CAUTION: Risk of minor personal injury.

ATTENTION : Risque de blessuremineure.

ATTENTION:

• Risk of property damage.

• Risque de dommages matériels.

NOTE: A note draws attention to important information.

TIP: A tip provides a suggestion to make working with the application easier.

Specifications Availability

Product specifications are available on the Extron website, www.extron.com.

Extron Glossary of Terms

A glossary of terms is available at http://www.extron.com/technology/glossary.aspx.

viiiXPA U 3502 • Table of Contents

Contents

Introduction ................................................ 1

About this Guide.................................................. 1

About the XPA U 3502......................................... 1

Features .............................................................. 2

Installation .................................................. 4

Mounting the XPA U 3502 Ampliﬁer ..................... 4

Tabletop Use ................................................... 4

UL Rack Mounting Guidelines.......................... 4

Rack Mounting ................................................ 5

Rack Shelf Mounting........................................ 6

Rack Mounting Ventilation

Recommendations ......................................... 7

Flexible Conduit Adapter Kit Installation ............... 8

UL Requirements............................................. 9

Installing the Flexible Conduit Adapter Kit ........ 9

Operation.................................................. 12

Front Panel Features.......................................... 12

Rear Panel Features .......................................... 13

Remote Volume Control Port ......................... 15

Remote Standby Port .................................... 16

Troubleshooting................................................. 17

Amplifier Fails to Exit Standby Mode

Promptly....................................................... 17

Amplifier Enters Standby Mode Too Early....... 18

Limiter/Protect LED Warning Indicators.......... 18

Over Temp Indicator LED............................... 18

XPA U 3502 • Introduction 1

Introduction

This section gives an overview of the Extron XPA U 3502 two-channel audio power amplifier.

Topics include:

• About this Guide

• About the XPA U 3502

• Features

About this Guide

This guide describes the XPA U 3502 two-channel audio power amplifier and discusses

how to install, configure, and operate it.

In this guide, the terms “unit”, “amplifier”, and “power amplifier” refer to the XPA U 3502.

About the XPA U 3502

The Extron XPA U 3502 is an ENERGY STAR-qualified two-channel audio power amplifier

that can drive 8 ohm or 4 ohm loads. The XPA U 3502’s outputs can deliver two 350 watt

channels into low-impedance systems.

The convection-cooled, plenum-rated enclosure of the XPA U 3502 doesn’t require empty

rack spaces for ventilation and include rack mount hardware. It features a highly efficient,

advanced Class D amplifier design with defeatable auto standby, fast wake up from

standby, and patented Extron CDRS (Class D Ripple Suppression) technology. Remote

volume and mute control is possible via Extron VCM, VC, select MediaLink controllers, and

Extron Control products with the digital Remote Volume Control Ports.

XPA U 3502 • Introduction 2

Features

• 350 Watts per channel into 8 ohms or 4 ohms

• ENERGY STAR®qualified amplifier — The XPA U 3502 is an ENERGY STAR-qualified

and energy efficient amplifier conserving energy and reducing costs.

• Extron Patented CDRS (Class D Ripple Suppression) Technology — CDRS is an

Extron pantented technology providing a smooth and clean audio waveform, and improving

signal fidelity over Class D amplifier designs. CDRS eliminates the high frequency switching

ripple characteristics of Class D amplifiers, a source of RF emissions which can interfere

with sensitive AV equipment like wireless microphones.

• Convection cooled and fanless operation - can be stacked without extra rack

space for ventilation — The XPA U 3502 does not have internal fans or vents for

cooling, ensuring quiet reliable operation. The unit generates substantially less heat than

conventional power amplifiers, making the XPA U 3502 ideal for rack-mount applications

where space is limited.

See Rack Mounting Ventilation Recommendations on page7.

• Defeatable auto-standby with fast wake up — The amplifier meets ENERGY STAR

qualification requirements with an auto-standby feature that automatically places the

unit into standby after 25 minutes of inactivity, thereby dramatically reducing power

consumption. The XPA U 3502 quickly returns to full power in less than 100 ms upon signal

detection, with minimal inrush current. Auto-standby can be disabled if required.

• UL 2043 Plenum-rated when used with the optional Flexible Conduit Adapter

Kit/AV equipment — The XPA U 3502 amplifier meets UL 2043 when installed with the

Flexible Conduit Adapter Kit, part # 70-228-02. The amplifier must meet this requirement

for heat and smoke release for installation within a plenum airspace. Above-the-ceiling

placement conceals the amplifier to prevent theft, and it is convenient for installing when

space inside the room is limited.

• 1U, half-rack enclosure — mounts in a standard rack enclosure with the included

hardware.

• Remote volume and mute control per channel — With Extron VCM, VC, and select

MediaLink controllers.

• Professional grade signal-to-noise and THD+N performance — The XPA U 3502

delivers professional grade performance, featuring 100 dB signal-to-noise ratio and THD+N

of less than 0.1%.

• Ultra low inrush current at power up - no need for power sequencing — Allows

multiple XPA Ultra amplifiers to be powered on simultaneously without overloading power

circuits. This eliminates the need for power sequencing.

• Power factor correction - removes harmonic content on AC line — The XPA U 3502

features power factor correction technology that smooths out the high peak currents of the

amplifier’s current draw, minimizing the presence of high-frequency harmonics on the AC

power line, preventing audible artifacts from being transmitted to other audio equipment in

the system.

• Rear panel recessed, detented level controls — Provides attenuation of input signal

for adjusting audio system gain staging. These controls are lcoated on the rear panel to

prevent tampering with the level adjustments. Laser-etched markings provide enhanced

visibility of settings for ease of configuration.

• Remote standby port — Enables the XPA U 3502 to be remotely powered down when

not in use, reducing operating cost.

• Automatic clip limiter — Detects actual onset of clipping. Gain is automatically reduced

without audible artifacts to prevent clipping distortion.

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