Avantone Pro CLA-400 Manuel de démarrage rapide - Page 2

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Avantone Pro CLA-400 Manuel de démarrage rapide

IMPORTANT SAFETY INSTRUCTIONS

Exposure to extremely high noise levels may cause permanent hear-

ing loss. Individuals vary considerable in susceptibility to noise-induced

hearing loss, but nearly everyone will lose some hearing if exposed to

sufficiently intense noise for a period of time. The U.S. Government's

Occupational Safety and Health Administration (OSHA) have specified the

permissible noise level exposures shown in the following chart.

According to OSHA, any exposure in excess of these permissible limits

could result in some hearing loss. To ensure against potentially danger-

ous exposure to high sound pressure levels, it is recommended that all

persons exposed to equipment capable of producing high sound pressure

levels use hearing protectors while the equipment is in operation. Ear

plugs or protectors in the ear canals or over the ears must be worn when

operating the equipment in order to prevent permanent hearing loss if ex-

posure is in excess of the limits set forth here.

Duration, per

Sound Level dBA,

Typical example

day in hours

slow response

Duo in small club

Subway train

100

Very loud classical music

1.5

102

That couple screaming

105

at each other

0.5

110

<0.25

115

Loudest parts at a rock concert

The CLA-400 complies with all applicable / RoHS / WEEE European

Union directives. This product complies with IEC62386.

Do not attempt to service this unit yourself, as it will void your war-

ranty. Please check your unit carefully upon receipt and return to place of

purchase immediately if there are any problems with the product. After

that, the standard AVANTONE 5 YEAR warranty will apply to defects in

materials and workmanship.

INTRODUCTION

The Avantone Pro CLA Studio Reference Amplifier is a classically designed

Class A/B amplifier. We took particular care to create an amplifier in the

traditional studio style, with generous VU meters, high quality Japanese

components and a serious toroidal transformer linear power supply. In

a standard 3U rack mount chassis, this amplifier can generate over 360

watts per channel into an 8 ohm load, making it perfect for large speakers

in a studio environment. The CLA-400 is convection cooled – no fan noise,

so it can be used in the same room as the monitors.

U.S.A.

Should your Avantone product require service, please contact the Avan-

tone PRO Service Department. +1 845 642 3697-or- e-mail info@avan-

tonepro.com. You must obtain an RA # (Return Authorization number)

from us before shipping a unit back to us. This RA # must be clearly

written on the outside of the box.

Please safely pack the units...It is best to use the original packing mate-

rials. AVANTONE PRO cannot be responsible for any damages incurred

in shipping to us due to poor packaging. PLEASE PACK CAREFULLY and

FULLY INSURE THE SHIPMENT.

INTERNATIONAL

For service or warranty assistance, please contact the AVANTONE PRO

distributor in your country through the dealer from whom you purchased

this product.

LIMITED 5 YEAR WARRANTY

AVANTONE CLA-400s are warranted by Avantone Pro to be free from

defects in materials and workmanship for the period of 5 YEARS to the

original purchaser. In the event of such defects, the Avantone Pro product

will be repaired without charge or, at our option, replaced with a new one

if delivered to Avantone Pro prepaid, together with a copy of the sales slip

or other proof of purchase date. The warranty excludes problems due to

normal wear, abuse, shipping damage or failure to use the product in ac-

cordance with the specifications.

All speaker systems are vulnerable to damage from sustained amplifier

clipping. This can be described as a distortion of the signal caused by the

amplifier running out of headroom. Heat will then be generated in the

voice coil of the driver beyond the heat handling capabilities of wire and

glue. At some point the voice coil will burn, causing the speaker to sound

very distorted; eventually the driver will stop working.

All parts and labor are covered under this Limited Warranty. However, if it

is determined by AVANTONE PRO that the voice coil was burned due to

sustained amplifier clipping, we reserve the right to charge the customer

for the cost of the repair, since this is considered abuse.

Avantone Pro shall not be liable for damages based upon inconvenience,

loss of use of the product, loss of time, interrupted operation or com-

mercial loss or any other damages, whether incidental, consequential, or

otherwise. This warranty gives you specific legal rights, and you may have

other rights, which will vary from state to state.

This warranty is not transferable.

The CLA-400 Studio Reference Amplifier is designed to be used in a studio

environment requiring high power output with no fan noise. Under test-

ing, it delivers a powerful 360 watts into 8 ohms and can run at one third

power without thermal fault.

The CLA-400 was designed to be paired with large format studio moni-

tors, but it can be used with just about any demanding speaker load. Very

low distortion, steady performance under harsh conditions, and an open

and transparent sound make this an obvious choice for discerning studios.

QUICK START GUIDE

Select the operating voltage. If you are chang-

Place volume controls to minimum

ing voltages, please be sure to change fuse

values as specified on the rear panel

Connect audio input, speaker cables and pow-

er cord with power switch in OFF position

Select operating mode: either two indepen-

dent channels or mono bridged mode.

Plug power into AC source

CONNECTING YOUR CLA-400

Before plugging in and powering up your CLA-400 please take a

moment to be certain that the proper AC MAINS operating voltage

setting has been selected on the rear panel.

THERMAL PROTECTION

If the heat sink temperature reaches an abnormally high temperature, the

amplifier will protect itself by disconnecting loudspeakers and shutting

down until sufficiently cooled.

DC VOLTAGE PROTECTION

If an amplifier channel detects DC voltage at its output terminals, the out-

put relay will immediately open to prevent loudspeaker damage.

REAR PANEL CONNECTIONS

1. BALANCED INPUT: The XLR and phone plug inputs accept a BALANCED

male XLR plug as well as a 3-conductor BALANCED TRS ¼" or a 2 con-

ductor UNBALANCED TS ¼" male plug. For unbalanced operation with a

TS connector the minus signal is automatically grounded. A pass-through

connection is provided for convenience when running multiple amplifiers

on the same signal chain.

2. VOLTAGE SELECT and AC MAINS INPUT: There is a switch on the

rear panel for selecting the proper AC/MAINS operating voltage for your

location. Please be sure to use the correct specified fuse value for your

location. Fuse tray is incorporated into the IEC320 receptacle on the rear

panel.

3. GROUND LIFT Switch: By engaging this switch the pin 1 shield is lift-

ed at the input jack and routed through two opposing diodes. This can

be used to aid in ground loop control of the incoming analog line signal.

The diode signal path still provides a safety ground in the event of very

high voltage ground loops. The earth ground from the AC input is always

Turn on all upstream equipment; run outputs

at minimum

Turn on power switch

Adjust volume to appropriate level at source

and speaker

INSTALLATION AND MOUNTING

The CLA-400 is a 3U amplifier that can be can mounted in a standard

19-inch rack. Four front panel mounting holes are provided.

SHORT CIRCUIT

If an output is shorted ( i, e.. defective speakers or crossed speaker wires)

the ZSP and thermal protection circuits will automatically protect the am-

plifier. The ZSP circuit senses the short circuit as an extremely stressful

load condition and attenuates the signal, protecting the channel's output

transistors from over current stress. If the short circuit remains, the load

will be disconnected by the thermal protection circuit.

connected. If the ground lift switch doesn't help, it may be necessary to

evaluate your power/ground scheme to eliminate noise issues.

4. SPEAKER OUTPUTS: Both SPEAKON™ and binding posts are provided.

In mono/bridge operation mode, the two positive terminals are driven an-

ti-phase. DO NOT GROUND any of the speaker terminals in bridge mode.

5. MODE SWITCH: DO NOT ADJUST THIS SWITCH WITH POWER ON.

This switch allows the user to operate the amplifier in three modes:

STEREO: both channels driven separately

PARALLEL: the input is sent to both outputs; volume controls

are still enabled for each channel

BRIDGED MONO: both channels operate together as a sin-

gle amplifier. Channel A is the input, and Channel A output is

in phase, channel B output is out of phase.