NJD NI575, NJ577, NI8100, NJ578, NI8100W User Manual

PROFESSIONAL

NL

D

F

GebruiksaanwijzingUser Manual

Sicherheitshinweise

Manuel Dʼutilisation

Issue 2

NI575 - NJ577 100W NI8100 - NJ578 100W NI8100W - NJ578W 100W NI10200 - NJ579 200W NI10200W - NJ579W 200W NI12300 - NJ580 300W NI15300 - NJ581 300W NI15300B - NJ582 400W NI15600 - NJ581A 600W NI18600 - NJ582A 600W

INSTALL CABINETS

GB SAFETY PRECAUTIONS For your own and others safety, please:

• carefully read the following safety precautions and operating instructions prior to operation

• observe the following safety precautions and operating instructions during operation

• store this manual in a safe place for future reference.

NJD install cabinets are designed exclusively to be floor-mounted, pole mounted using the fitted top-hat, wall mounted or suspended from built in flying point. If suspension of the speakers is required, please ensure that suitable fixtures are mounted by qualified personnel.

Safe speaker installation:

• Be sure to mount your speakers on a solid, stable and level base or stand. Vibrating floors (e.g. sprung stages), as well as tables, chairs or similar objects do not provide reliable support for speaker enclosures or stacks.

• Setting up your speakers some distance from the audience area, dance floor, musicians will minimize the risk of accident.

• Should local conditions prevent you from following these safety precautions, please be sure to secure the speakers so that they cannot fall or be knocked over.

• If you have any concerns regarding the installation please consult a PA expert.

Prevention of speaker damage:

Please protect your speakers from damage due to objects or liquids entering the enclosure.

Damage and repair:

NJD cabinets must be repaired by qualified personnel if:

1

• objects or liquids have entered the enclosure,

• the speakers have been subject to rain or excessive moisture,

• the enclosure does not work properly.

• the enclosure has been dropped or otherwise physically damaged.

Maintenance:

Any additional maintenance/repair work should be carried out by qualified service personnel only.

Before you begin

Your NJD Cabinet was carefully packed in the factory, the packaging is designed to protect the unit from damage during transit. Nevertheless, we recommend that you carefully examine all the packaging and contents for any signs of damage which may have occurred during transit. If the unit is damaged, please do not return it to NJD, but notify your dealer immediately. Otherwise, claims for damage or replacement may not be granted. Damage claims must be made by the person who shipped the item.

Connection

Use the Neutrik speakon connectors on the rear of the unit to connect the NJD cabinet to your power amplifier.

Improving Performance

The NJD cabinet was designed for use in a variety of applications. Naturally, the sound of your speaker cabinet largely depends on the acoustic properties of the environment in which it is used. The following points should help you get the most out of your NJD speaker system.

HF driver

High frequencies are a crucial part of the audio spectrum, which ensures clear

GB

sound and speech intelligibility. Whereas these frequencies are the most easily located, they are also the first to be acoustically blocked. We therefore recommend that you set up your speakers so that the HF driver is situated slightly above the heads of the audience. This will ensure not only optimal dispersion of the high-frequency content, but also considerably improved speech intelligibility and clarity.

Avoiding feedback

Always place the front-of-house speakers (the enclosures facing the audience) in front of the microphones. Use professional floor wedges, so that the performers on stage can hear themselves.

Avoiding feedback when using turntables (e.g. DJ applications)

Turntables often produce low-end feedback: low frequencies are fed back to the pickup arm and cartridge and reproduced again by the speakers. Common causes of low-end feedback are speakers set up too close to the turntable, rooms with a wooden floor or elements placed on the stage. In such cases, try moving the speakers away from the turntable or off the stage and placing them on a solid support. Another possibility is to mount the enclosures on stands, thus minimizing direct contact between floor and speakers.

Protecting your speakers with a lowcut filter

Low-frequency rumble or extreme low frequencies can lead to an excessive displacement of the speaker diaphragm and in turn to permanent damage. Using an equalizer or a low-cut/high-pass filter to eliminate the low frequencies below the response curve of the speaker can effectively prevent this. Most equalizers and sound enhancers provide a low-cut

2

function
The use of a low-cut filter in the signal
path is especially recommended when
using turntables and/or CD players as
signal sources. CD players often produce
extremely low frequencies, which can lead
to excessive diaphragm displacement.
Frequency Response
All NJD models are equipped with a built-
in passive crossover network, which
ensures a smooth transition between the
individual frequency ranges . The
Individual crossovers are tailored to
perfectly suit the cabinet and give the best
day to day performance.
Pin Arrangement
The NJD cabinets are equiped with 2
Neutrik(C) speakon sockets wired in
parallel. The pin arrangement is as
follows;
Speakon Plug	Amplifier
+1 pin	+ Output
-1 pin	- Output
Warranty

The cabinet, crossover and fittings are guaranteed for 2 years against defective workmanship or components. The driver and horn are guranteed for 1 year but as these are consumable items all warranty claims need to be approved by the NJD service department.

All servicing and warranty clams must be made in the fist instance to your dealer or supplier.