Arcam Alpha 9 Manuale - Pagina 9

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BI-AMPING

The performance of your system can be further enhanced over

that achieved with bi-wiring, by extending the same principal

one stage further to include separate amplification for the low

and high frequency speaker drive units as well as separate

loudspeaker cables. This is known as biamplifying, or bi-amping

for short.

To implement bi-amping therefore requires four amplification

channels.

In practice this is done by using two stereo

amplifiers; when one of these is an integrated amplifier it is best

to use this drive the high frequency (HF) units whilst the

outboard power amplifier is used to drive the low frequency (LF)

units.

We recommend that you use identical amplifiers to avoid

potential imbalances in sonic performance and sensitivities.

The Alpha 9/9P combination is ideal, as is the Delta 290/290P.

It is however possible to mix the Alpha 9 and Delta 290 range

of amplifiers.

HOW TO SET UP A BI-AMPED SYSTEM

1. Remove the shorting links from each of the red and

black terminal pairs on the rear of your loudspeakers.

THIS IS ESSENTIAL OR DAMAGE TO YOUR

AMPLIFIERS MAY RESULT WHICH IS NOT COVERED

UNDER WARRANTY.

BI-AMPING YOUR LOUDSPEAKERS

INTEGRATED AMPLIFIER

POWER AMPLIFIER

You will need two lengths of loudspeaker cable (or a

suitably terminated cable capable of being used for bi¬

wiring in one length) and one stereo amplifier per

frequency band.

Connect your system as per the diagram opposite

ensuring correct polarity at all times. The positive (+)

connections on the loudspeaker must go to the positive

(+) connections on the amplifier and the negative (-)

connections on the right loudspeaker must go to the

negative (-) connections on the right channel of the

amplifier etc. You also need to make a connection from

the preamp out sockets of your integrated amplifier, or

preamplifier, to the power amp in sockets of the power

amp.

ADDING AN ALPHA 9P TO AN EXISTING ALPHA 9

INTEGRATED AMPLIFIER

If you are using an Alpha 9, an Alpha 9P can be added to bi-

amplify a pair of bi-wireable loudspeakers.

This will reap

substantial improvements in sound quality if the following

advice is observed.

■

Always switch on the Alpha 9 and allow It to stabilise

(indicator light turns green) before switching on the

Alpha 9P.

■

The Alpha 9 and Alpha 9P power amplifier are placed on

separate shelves.

Stacking the units on top of each other will reduce the

sound quality slightly. It will also reduce ventilation and

consequently the continuous power handling capability.

■

The existing Alpha 9 should be used to drive the

loudspeakers' HF (high frequency) units. The new Alpha

9P Is utilised for the LF (bass) drivers, as shown in the

wiring diagram below.

■

At the end of a listening session the Alpha 9P should

always be turned off first.

■

High quality interconnect cables should be used

between the Alpha 9 and Alpha 9P.

■

The use of high quality interconnect and speaker cables

in your system is essential to obtain good sound quality.

Contact your dealer or Arcam for further details and

recommendations.

Note: The second set of speaker terminals (SP2) on

both units can be used to drive extra loudspeakers in

other rooms provided the impedance of these are 8

ohms or more.

WARNING - Ensure that the TERMINAL LINKS ARE

REMOVED on the loudspeakers before switching on

the amplifiers.

Failure to do this could cause

damage to one or both amplifiers and this is not

covered under the warranty.