Genelec 7040A Handleiding

Genelec Subwoofer 7040A

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Pagina 1/12

7040A Operating Manual

操作手册

Genelec 7040A Active Subwoofer

真力有源低音音箱 7040A

Introduction

Congratulation and thank you for choosing

Genelec!

Since 1978, Genelec has been guided by a

single idea – to make perfect active monitors

that deliver neutral and accurate sound in

every kind of acoustical environment. In

Genelec’s quest for this ultimate goal, our

unrivalled commitment to research and

development has led us to continuously

develop innovative driver technology,

electronic circuitry, enclosure designs and

many more. Our design philosophy is based

on sustainability and environmental values,

where industrial design serves our product

acoustical performance.

Your Genelec product has been designed

and manufactured with care in our factory,

in Finland, using environmentally efficient

solutions to give you reliable operation over

many years.

Please take the time to read this manual.

Happy monitoring!

General Description

The Genelec 7040A is a very compact active

subwoofer for reproducing low frequencies.

The 7040A extends the bass reproduction

of Genelec 8010, 8020 and M030 active

monitors for stereo applications. Using the

7040A extends their frequency responses

down to 30 Hz (-6 dB).

Driver

The 7040A contains one 165 mm (6.5

in) magnetically shielded driver, housed

in Genelec Laminar Spiral EnclosureTM

(LSE™).

Bass Management

Balanced XLR connectors are used for the

audio inputs and outputs. There are two

input connectors and two outputs.

The bass management unit in the 7040A

subwoofer splits the input into low and

high frequency components at 85 Hz.

Frequencies below 85 Hz are reproduced

by the subwoofer. Frequencies above 85

Hz are directed via the subwoofer's output

connectors to the main monitors. The

subwoofer's outputs have the same level as

the inputs.

The subwoofer sensitivity can be adjusted

from +12 to -6 dBu to match the subwoofer

sound level easily with different monitors.

Two "BASS ROLL-OFF" switches provide

bass response adjustment to compensate

for the acoustical environment in three 2

dB steps. Two switches allow alignment

of subwoofer phase with the monitors.

The phase can be adjusted in 90 degree

increments between 0° and -270°.

Amplier

A Class D power amplifier produces 50

W output power with very low THD and

IM distortions. Driver overload protection

is included in the amplifier circuitry. The

a m p l i f i er a l s o i n c or p o r a t es t h e r m a l

overload and short circuit protections.

The power supply accepts mains voltages

from 100 to 240 VAC.

ISS™ Autostart

The 7040A is equipped with Intelligent

Si g na l Se n s i n g T M (ISS™) aut om a t i c

start funct ion. ISS turns t he amplifier

to standby mode if no input signal has

been detected for one hour. The power

consumption in standby mode is less

than 0.5 watts. Playback automatically

resumes once an input signal is detected.

There is a slight delay in the automatic

powering up. In those environments where

the 7040A is required to be on all of the

time, the ISS function can be disabled

by setting the “ISS DISABLE” switch to

the “ON” position. Then the subwoofer

is c ont i n u ou s ly p owered a n d can be

turned off using the power switch on the

connector panel. The default position

from the factory is with "ISS DISABLE" in

the OFF position.

Installation

The subwoofer is supplied with a mains

cable and this operating manual. After

unpac king i nspec t the subwoofer for

possible damage in transport . Ensure

that the subwoofer and the monitors are

powered off before connecting cables.

Genelec 7040A Active Subwoofer

Audio connections to the subwoofer and

monitors use balanced XLR cables (not

included in the subwoofer delivery content).

As the 7040A has an integrated amplifier,

it may only be connected to a line level

signal source, such as a mixing console or

preamplier, never to the loudspeaker outputs

of a power amplier or an integrated amplier.

The source is connected to the "LEFT IN"

and "RIGHT IN" connectors of the subwoofer.

The subwoofer’s output connectors "LEFT

OUT" and "RIGHT OUT" are connected to the

monitors.

If the signal source has unbalanced RCA

outputs, you can use signal cables as shown

in Figure 2.

Once all connections have been made, the

subwoofer and monitors can be powered up.

Positioning In The Room

Placement of the subwoofer in the room

affects the subwoofer frequency response

and sound level dramatically, as the room

influences the low frequencies strongly.

Even a slight change in the subwoofer's

location can make a marked difference in

the frequency balance. Often patient and

methodical experimentation is needed to

nd the optimum placement. The placement

will also affect the phase alignment between

the monitors and the subwoofer, as well as

the need for bass roll-off adjustment.

First, place the subwoofer slightly offset

from t he center of the front wall. T he

distance to the nearest wall should be

less than 0.6 m (24 in) measured from the

subwoofer's driver. This position increases

acoustic loading and sound output due

to the proximity of the wall and floor. Too

large a distance from the wall can cause

cancellations and reduce subwoofer output.

The monitor should be placed at least 1.1 m

(43 in) away from walls to avoid reduction of

low frequency output (see Figure 3).

If the subwoofer frequency response does

not seem balanced, move the subwoofer

slightly to the left or right. This changes

how the room modes are excited and can

result in improved flatness. Positioning

the subwoofer close to a corner boosts

the subwoofer outpu t but may cause

as ymm et ri c al spa t ia l i m a ging at low

frequencies.

Operating Environment

The 7040A subwoofer is designed for indoor

use only. The ambient temperature should

be 15-35 °C (50-95 °F) and the relative

humidity 20-80 %. Condensation is not

allowed. If it has been stored or transported

in a cool environment, the product must be

allowed to warm up in its packing to the

ambient temperature before connecting

mains power.

Sufficient amplifier cooling and reflex

port functioning is required when t he

>110 cm (43 in)

Main

monitor

< 60 cm (24 in)

Figure 3. Recommended distances to

the front wall

Figure 1. 7040A's amplifier panel, connectors and controls.

Figure 2. XLR to RCA connector for

connecting to an unbalanced signal source.

MADE IN FINLAND

www.genelec.com

7040A ACTIVE SUBWOOFER

MAGNETICALLY SHIELDED

SERIAL

NUMBER

LEFT OUT

LEFT IN

RIGHT OUT

RIGHT IN POWER

ROLL-OFF

-180°

-90°

-4 dB

-2 dB -270°

ISS-DISABLE

MAINS INPUT

50 / 60 Hz 70 W

100 - 240 V~

-6

+12

-3

-4

dBu

SENSITIVITY

FOR 100 dB

SPL @ 1m

SIGNAL INPUT

CONNECTORS

SIGNAL OUTPUT

CONNECTORS

BASS ROLL-OFF

PHASE AND

ISS DISABLE

SWITCHES

MAINS INPUT

POWER SWITCH

Product specificaties

Merk:	Genelec
Categorie:	Subwoofer
Model:	7040A
Kleur van het product:	Zwart
Stroomverbruik (in standby):	0.5 W
Impedantie:	10000 Ohm
Gemiddeld vermogen subwoofer:	- W
Diameter driver subwoofer (imperiaal):	6.5 "
Subwoofertype:	Actieve subwoofer
Frequentiebereik subwoofer:	40 - 85 Hz
Breedte van de subwoofer:	350 mm
Hoogte van de subwoofer:	410 mm
Diepte van de subwoofer:	205 mm
Gewicht subwoofer:	11300 g
Subwoofer sensitiviteit:	100 dB
XLR in:	Ja
AC-ingangsspanning:	100-240 V
Stroomverbruik (typisch):	70 W
Diameter driver subwoofer:	165 mm