Arcam Alpha 7SE Справочник - Страница 6

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Technical notes

Alpha 7SE, 8SE & 9 CD Players

These all use the same basic chassis and mechanics and the

controls are identical. They differ in the system of digital to analogue

(D/A) conversion used in each player Lower specification Arcam

CD players can be upgraded by your dealer to higher performance

models by installing the appropriate Arcam D/A upgrade kit

Alpha 7SE CD Player

This has Delta-Sigma D/A conversion with 24 bit filtering.

Alpha 8SE CD Player

The DAC module of the 8SE utilises the Pacific microsonics PMD

100 filter and HDCD® (High Definition Compatible Digital)

decoder; coupled to the high quality PWM (Pulse width

modulated) bitstream DAC (digital to analogue convertor) used in

the Alpha 8CD player The benefits of this improved sound quality

on all conventional CDs plus the ability to reproduce the full

dynamic range of the ever increasing number of HDCD encoded

CDs now available.

Alpha 9 CD Player

(

TM,

The Alpha 9 CD incorporates the unique dCS Ring DAC

which

delivers state-of-the-art performance from its revolutionary 24 bit

technology.

This new DAC is the result of a three year partnership between

two British companies - Arcam and dCS (Data Conversion Systems

Ltd), the world's leading supplier of professional audio ADCs and

DACs. Ring DAC technology exhibits exceptionally linear response

when decoding digital audio data, with the ability to resolve the

finest acoustic details recorded on a compact disc.

In the Alpha 9 CD player, 24 bit digital filtering is provided by the

Pacific Microsonics PMD 100 chipset, which also performs HDCD

(High Definition Compatible Digital) decoding of suitably encoded

CDs.The sonic performance of the Alpha 9 makes it one of the

very best CD players currently available, regardless of price.

For optimum sonic performance, the analogue power supply of the

Alpha CD players is kept powered up all the time the unit is

connected to the mains supply. The front panel power switch

powers down all other circuitry.

This means that even though the power switch is off, it may be

possible to hear a slight residual hum coming from the mains

transformer inside the CD player This is perfectly normal. If the

unit is to be left unused for an extended period, we recommend

that it is disconnected from the mains supply by switching it off at

the wall socket.

This appliance is normally supplied with a moulded mains plug

already fitted to the lead. If for any reason the plug needs to be

removed, it must be disposed of immediately and securely, as it is a

potential shock hazard when inserted into the mains socket.The

unit is double insulated and does not require an earth.

If the plug is removed then the remaining lead must be rewired as

follows:

The blue wire

must be connected

to the terminal

which is coloured

blue or marked

with the letter N.

The green and yellow

wire must be connected

to the terminal which

is coloured green and

yellow, or marked with

the letter E or the

safety earth symbol.

wire must be

connected to the terminal

which is coloured brown or

marked with the letter L.

For convenience and ease of use, Alpha CD players are supplied

with an infra-red remote control handset. The handset transmits

Philips RC-5 type codes.

POSITIONING

Always place the CD player or transport on a level, firm

surface. Placing your player on a set of dedicated sorbothane

isolation feet will isolate the unit from its surroundings as well as

absorbing the vibrations created within the player itself. You will

generally hear some sonic improvements, which makes this an

extremely cost-effective upgrade.

RADIO INTERFERENCE

The Alpha 7SE/8SE/9 CD players are digital audio devices which

have been designed to very high standards of electromagnetic

compatibility.

Both CD players and digital to analogue converters (DACs)

generate, and can radiate RF (radio frequency) energy. In some

cases, this can cause interference with FM and AM radio reception.

If this is the case, keep the CD player and its connecting cables as

far from the tuner and its aerials as possible. Connecting the CD

player and the tuner to different mains sockets can also help to

reduce interference.

EC COUNTRIES - These products have been designed to comply

with directive 89/336/EEC.

USA - These products comply with FCC requirements.

LASER RADIATION

If an Arcam Alpha CD player is operated whilst the outer casing is

removed, invisible laser radiation could cause eye damage.

CLASS I

LASER PRODUCT

For more details about HDCD and HDCD recordings please visit

the Pacific Microsonics Website www.hdcd.com or contact them at

Pacific Microsonics Inc. 2560 Ninth Street, Suite 219. Berkeley,

CA 94710, USA