Matrix Amplification XT1000 Manual de usuario descargar pdf (Pagina 13)

XT SERIES USER MANUAL 12

The previous table is a rough guide for recommended cable gauges.

It is important to use sufficiently heavy duty cables (try to use at least 2.5mm

) and plan the

use and instillation of sound equipment such that the speaker cables in particular are kept short

where possible (under 6m/20ft should provide enough flexibility to cover most applications).

Speaker cables are usually made with copper to act as the conductor carrying power.

Although it is well suited to this task, it is still not perfect and has an undesirable property in the

form of resistance. This factor becomes a problem where cables are long and also of insufficient

thickness.

Cables intended for speaker use are commonly found in sizes of 1.5, 2.5, 4mm

Unfortunately, people still advertise their cables with a confusing mix of different standards.

Cables are also measured in the diameter of the copper core (often confused with mm

), AWG

and a few others. Rough conversion for AWG and Diameter to mm

are included in the tables on

the previous page.

Poor cable selection results in power being lost in the speaker cable as heat, and also can

dramatically reduce the amplifier's 'Damping Factor' – this is how tightly the speaker system is

controlled by the amplifier. Greatly reduced damping results in reduced sound quality; Typically

bass starts to lack the snappy bite on kick drums and toms, and a booming drone occurs

through the driver failing to stop moving when the sound has passed.

Reducing the total resistance of the speaker load will demand heavier, shorter cables to be

used in order to keep the losses and degradation to a minimum. Loads of less than 4ohms are

not generally recommended, even for amplifiers which will support them, as it puts the amplifier

under considerable stress and also dramatically reduces the damping factor. Typically a 2 ohm

load will compromise damping factor enough to audibly degrade the performance of the speaker

system.

Consult the tables on the previous page, to determine a suitable cable gauge for your

required cable length and speaker impedance.

Notes:

● The tables quote the gauge/area of the copper for each individual wire; the 'Wire' column

assumes in stating '2' wires – that one wire to each terminal of the speaker (+/-) is used.

'4' wires assumes that a with a 4 core cable, that the wires are paired to make 2

connections to one pair of terminals.

● Take extra care in ensuring that the + and - connections do not get reversed in the leads.

Whilst this will not usually cause damage, it will result in poor performance. When a cable

feeding one speaker cabinet is wired backwards, it will result in partial cancellation of

sound between the two speakers. Usually this presents itself as reduced bass levels and

indistinct stereo image.

● Purchase of a cable tester specifically for audio leads is recommended; as this makes it

easy to identify and detect problems in wiring which may otherwise slip by

unnoticed.

● NEVER use light duty cable which has not been designed for high

power audio use ('bell' wire, cat 5 cables, etc); this will result in

poor performance and can present a fire hazard.

● NEVER Pair together (-) negative/'ground' cables from different

amplifiers, this will result in amplifier malfunction and can easily

result in permanent damage to speaker systems, amplifiers and

associated equipment.

MATRIX AMPLIFICATION REV.1.17

1 2 ... 8 9 10 11 12 13 14 15 16

Comentarios a estos manuales

Sin comentarios

Matrix Amplification XT1000 Manual de usuario Pagina 13

Comentarios a estos manuales