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Arcam Delta 2 Loudspeaker

Instructions for use

Introduction

Thank you for buying the Arcam Delta Two loudspeakers.

These loudspeakers have been designed to produce a high standard of

sound reproduction at an affordable price. Although suitable for use with

any good quality hi-fi equipment, the speakers are an excellent sonic and

physical match for the rest of the Arcam Delta range of electronics. They

also work well with our entry level Arcam Alpha amplifier.

Installation Instructions

Positioning

For optimum results these speakers should be placed on

rigid stands 15 to 40cms from a rear wall and at least 60cms (2 feet) from

any side wall. They should never be used on the floor or in corners.

The final sound will of course depend on the acoustics of

the listening room, and experimentation with speaker positioning and

furnishings is definitely worthwhile. As a starting point we suggest that the

speakers should be placed 2.4 - 3m (8-10 feet) apart with their backs

lOcms (4 inches) from the rear wall. The bass output may then be raised

or lowered by moving the speakers closer to or further away from the

wall. Toeing-in the speakers, so that their axes cross just in front of the

listener may also be benificial to treble balance and stereo imagery.

Loudspeaker Stands

The more firmly a speaker is held, the better it will sound.

The Arcam STM3 stand is matched to the requirements of the Delta Two

and is available from your Arcam dealer.

Alternatively, use rigid metal stands of 40-60cms (14-24 _

inches) height. Properly damped types that do not "ring" when tapped

with a pencil, either by virtue of construction, or by filling with dry silver

sand, will bring out the best in the loudspeaker.

It is possible to obtain a good sound balance when shelf

mounting the Delta Two (though stands are recommended tor optimum

performance). The rear of the loudspeakers should be no less than

50mm from the wall to allow free flow of air from the reflex port and it

should be mounted at least 450mm from a corner and 600mm from the

floor (these distances may be interchanged if more convenient).

Speaker Cables

The speakers should be connected to the amplifier using

good quality, high purity copper cables with a cross sectional area of at

least 1 mm2 per conductor. Solid core cables or those with surface only

conductors are particularly suitable. Bell wire and very cheap or giveaway

speaker cables should be avoided - they are a false economy and can

badly degrade the sound quality. Neither do we recommend the use of

fat, heavily stranded cables, as these often impart a harsh and hashy

sound to the system. We recommend AudioQuest cables. Your dealer

will be able to give you advice on the differences between the various

models available.

The cable runs to the two speakers should be of roughly

equal length and yet as short as practicable (a long run of speaker cable

always sounds worse than a short one). The usual care should be taken

over speaker phasing. Both loudspeakers should be connected to the

amplifier with the same phase (black to black and red to red). All speaker

cables will be colour coded or have some physical identification (such a

small "rib" along one wire) to aid correct phasing.

Bi-wiring

Bi-wiring loudspeakers is a cost effective way of improving

the sound quality of a hi-fi system. The bi-wiring principle involves

electrically isolating the treble and bass sections of the loudspeaker’s

crossover network and bringing out the connections to four, rather than

two, terminals on the back panel. The use of separate cables to each half

of the crossover then enables the complete isolation of the signals fed

from the amplifier to the treble and bass speaker units. A reduction in

low level intermodulation and crosstalk effects is achieved, resulting in a

cleaner sound with improved imaging and separation o* instruments.

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