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Genelec 1234A

Smart Active Monitor

Operating Manual

1234A

Genelec 1234A Operating Manual

Introduction

Congratulations 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 more. Our design philosophy is

based on sustainability and environmental

values, where industrial design serves our

products' acoustical performance.

Your Genelec product has been designed

and manufactured with care in our factory,

in Finland, using environmentally ecient

solutions to give you reliable operation

over many years.

Please take the time to read this manual.

Happy monitoring!

General Description

The Genelec 1234A Smart Active Monitor

is designed for neutral sound reproduction

at high SPLs in large control rooms. The

system comprises of a 160 litre enclosure

and a RAM-XL 19 in 3U rack mount

amplier unit.

The monitor enclosure contains two

305 mm (12 in) bass drivers, a 130 mm

(5 in) midrange, and a 25 mm (1 in) treble

driver. The midrange and treble drivers are

mounted in a Genelec Directivity Control

Waveguide™ (DCW™) which can be

rotated through ±90° for either horizontal

or vertical mounting. The system low

frequency response extends down to 29

Hz (-6 dB). The high frequency response

extends up to 21 kHz (-6 dB).

Digital signal processing in the RAM-XL

amplier unit is done with high precision

algorithms, and includes driver and

amplifier overload protection. The room

response compensations include highly

exible parametric lters, level alignment,

and acoustic delay compensation. These

allow accurate matching to all console

output sections and room acoustics.

The power amplifiers of the RAM-XL

produce 2 x 750 W, 400 W and 250 W of

short term power in the bass, midrange,

and treble channels respectively.

Delivery Content

The Genelec 1234A Smart Active Monitor is

shipped in a box containing an enclosure,

an individually calibrated RAM-XL amplier

unit, a mains connecting cable, an RJ45

cable and one Allen key.

Before installing the system, check

all items for damage and omissions. If

damage is found, contact directly the

distributor and insurance agent. If there

are any missing components, contact your

local dealer.

Cables

Each 1234A is delivered with the following

cable kit:

• One mains cable

• Two 10 m (32 ft 9 in) 4-pole Speakon

cables

• One 10 m (32 ft 9 in) RJ45 cable

• One 5 m (16 ft 4 in) RJ 45 cable

The 10 m cables are designed to go

between the amplifier and the monitor

enclosure. If you need to make custom

length cables for this, please connect the

Speakon cables pin to pin and see Table 1

for recommended wire gauges.

Amplifier Positioning

The RAM-XL amplifier is encased in a

standard 19" 3U rack case. The cooling

system circulates air into the amplifier

from behind, so that it exits through the

openings on the right side. Free flow of

fresh air must be ensured and the space

around the amplier must be suciently

ventilated to dissipate accumulating heat

so that the temperature does not rise

above 15-35 degrees Celsius (50-95°F). If

the system overheats it will stop operating

until a safe temperature is reached.

Make sure that the amplier is positioned

so that the monitor connecting cables will

reach. A space 100 mm (4 in) deep should

be left behind the rear panel of the amplier

unit to allow for the cable connectors and

air circulation.

The RAM-XL amplier is compatible with

mains voltage supply of 100 - 120 VAC and

220 - 240 VAC 50/60 Hz.

Operating Environment

These monitors and their RAM-XL

amplifiers are designed for indoor use

only. The permissible ambient temperature

is 15-35 degrees Celsius (50-95°F) and

permissible relative humidity between

20% and 80%. Humidity condensation on

the product is not allowed during use. For

instance, if the product has been stored or

transported in a cool environment and then

taken into a warm room, it must be allowed

to warm up to the ambient temperature

before connecting to mains power.

Aligning the DCW

The 1234A monitor is designed to be ush

mounted in either the vertical or horizontal

conguration. The DCW should be rotated

so that the treble and midrange drivers

align vertically. This ensures that optimum

stereo symmetry is obtained.

IMPORTANT-The DCW plate is heavy,

care must therefore be taken when

removing and replacing the DCW. To rotate

the DCW plate, proceed as follows:

• Place the monitor in its intended

listening orientation.

• Unscrew the eight M5 xing screws on

the edges of the plate using a 4 mm

Allen key.

• Carefully pull the plate a small distance

away from the enclosure. Rotate the

DCW so that the midrange and treble

drivers are aligned vertically (treble

driver on top) and remount the DCW

plate reversing the procedure above.

Flush Mounting of the

Enclosure

Although the 1234A may be used

successfully as a free standing monitor,

ush mounting is strongly recommended

for acoustical reasons. Flush mounting

improves the bass response and eciency

and also enhances the midrange transient

and frequency response.

Figure 1. The location of the acoustic axis.

The monitor enclosure has its acoustical

axis midway between the midrange and

treble drivers. This axis should be used

as the listening and measuring axis of the

system. (See Figure 1 and 2).

The typical listening distance varies

between 2 and 3.5 m (6½ and 11½ ft) from

the monitors. The monitor should be aimed

so that the vertical acoustical axes of the

two monitors meet midway between the

standing and seated listening position (1.4

m – 4 ft 7 in from the oor). This allows

the correct frequency response to be

received by a standing or seated person.

The monitors should not be mounted too

high as this increases the required vertical

tilt of the monitor and reduces the optimum

listening area.

The ceiling, side walls and especially the

rear wall should be acoustically absorbent

at low frequencies. The monitor mounting

wall should be acoustically hard and

therefore reective. The monitor mounting

wall should be angled so that the monitors

are correctly aimed. Great care should be

taken over how the monitor is mounted into

the solid and sturdy wall structure.

Note the following:

A space 50…100 mm (2…4 in) wide can be

left around the monitor enclosure.

Cover the space around the enclosure

with a facing panel, this should be xed

to the wall. Leave a gap of about 5…10

mm (¼…½ in) between the enclosure and

the panel. Fill this gap with a soft rubber

gasket to allow for possible enclosure

movement. Ensure that the speaker cables

can reach the rear of the enclosure. If a

light (e.g. wooden), but heavily braced,

wall is used, the monitor enclosure should

be mounted on vibration isolators with a

resonant frequency of around 2…8 Hz, to

prevent vibrations from being transmitted

to the wall and impairing the low frequency

performance. The space around the

enclosure should be lled with absorbent

mineral wool or foam plastic. The walls

must be well braced.

For a solid wall (e.g. concrete), the

enclosure may be directly mounted to the

wall without vibration isolators. The space

around the enclosure should be lled with

mineral wool or sand bags.

Discontinuities in the enclosure mounting

wall will cause diraction, which leads to

>2.0m

390 mm

270 mm

700 mm

383 mm

890 mm

>2.0m

350 mm

660 mm

340 mm

(13 3/8 in)

355 mm

(14 in)

355 mm

(14 in)

180 mm

(7 7/8 in)

180 mm

(7 7/8 in)

180 mm

(7 7/8 in)

Cable gauge Max. length

2,0 mm2 (14 AWG) 30 m (100 ft)

3,3 mm2 (12 AWG) 40 m (130 ft)

5,3 mm2 (10 AWG) 60 m (200 ft)

Table 1. Recommended cable thicknesses

for dierent lengths of speaker cable

Figure 2. Monitor enclosure

mounting.

Figure 3. Monitor enclosure mounting

details.

Figure 4. Eliminating discontinuities.

Figure 5. Recess for speaker cable

connectors (front view).

Produktspecifikationer

Varumärke:	Genelec
Kategori:	högtalare
Modell:	1234A

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