Dynaudio Focus 110 A Specifications download pdf (Page 8)

Switching on and setting

6 Dynaudio Focus 110 A

Connecting the AC power input

NOTICE: Make sure mains voltage matches your region’s mains

voltage specification (see “Technical Specifications” on

page 10).

1. Make sure the speakers are switched off.

2. Connect the AC power input to the mains socket via the power

cable delivered with your speaker.

Switching on and setting

NOTICE: Make sure all connections are made properly and the output

of the preamplifier is set to a low level.

X Switch the Focus 110 A speakers on.

The Power LED (2) on the backplate will light green.

Protection circuits

The Focus 110 A speaker has several built in protection circuits to

reduce the risk of hazard or damage due to overloading.

The internal power amplifiers have thermal protection. This activates if

a problem should occur, and helps protect both the electronics and the

loudspeaker drivers.

There is also a thermal sensor measuring the temperature on the heat

sink (5). An electronic circuit will mute the signal when too high

temperature is reached.

There is an overload protection circuit on the tweeter to prevent burning

the tweeter driver in case of overloading. This circuit will mute the

tweeter signal if too much current is fed to the tweeter.

The woofer channel has a built in limiter that protects the woofer unit

from too much excursion. It works by reducing the gain of the circuit

when a certain threshold level is reached.

NOTICE: Avoid running the system into severe clipping. Despite the

advanced protection system, you may still be able to

damage your speakers by severe overpowering. The limiter

works over a certain range, but exceeding this level may

send a severely clipped signal to your drivers. When a

noticeable distortion occurs, please turn down the level to

your speakers.

Cutting off low frequencies

Without any filter setting, a speaker is forced to handle the full audible

range including very low frequency signals. The Focus 110 A is

designed for reproducing low frequencies down to 55 Hz very precisely

and at high sound pressure levels.

When operating the Focus 110 A together with a subwoofer (e.g. in a

home cinema setup) or to allow a higher undistorted sound pressure

level, it is recommended to cut-off low frequencies.

Lower frequencies can be cut-off by setting the

High pass

switch

(1)

Table 1: Settings for the High pass switch.

Set High

pass to...

to...

Flat achieve full range reproduction

(no cut-off).

60 Hz cut off frequencies below 60 Hz.

80 Hz cut off frequencies below 80 Hz.

Setting

-10

80 Hz

60 Hz

Flat

Level

High pass

Focus110A

book

Seite

Mittwoch

Januar

2009

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Dynaudio Focus 110 A Specifications Page 8

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