Bogen NEARA12 Bedienungsanleitung

OWNER’S GUIDE

MODEL A12

A-SERIES ENVIRONMENT-PROOF

HIGH-OUTPUT/LONG-THROW LOUDSPEAKER

Speciﬁcations subject to change without notice.

54-2172-01B 0812

Near A12 Speaker (1)

Mounting Knobs (2)

Yo ke ( 1)

Rubber Friction Disk (2)

Safety Attachment Bolt (1)

Owner’s Guide (1)

PACKAGE CONTENTS

SPEAKER ORIENTATION

RIGHT

The NEAR A12 is acoustically designed to operate in a vertical orientation with

the NEAR logo right side up. This orientation will provide 90 degrees of hori-

zontal coverage and 45 degrees of vertical coverage.

RIGHT

WRONG

The A12 is a ported speaker, designed to shed water, and includes a unique

water-repellent scrim.This scrim covers the ports and horn throat to slow the

ingress of water, but a small amount of water may still enter the cabinet.Weep

holes are provided at the bottom of the speaker baffle to drain any water that

enters the cabinet.

NOTE: It is very important that the speaker be mounted with its face either

vertical or facing down. Never install the speaker with the face tilted up, as this

will undermine the water-shedding aspects of the design and allow excessive

water to enter the cabinet.

WRONG

YOKE INSTALLATION

After selecting the speaker location, securely attach the yoke to the surface.An

Adjustable Tilt-Mount Adapter (TMA812) is available to provide various tilt an-

gles. The TMA812 allows attachment to walls and posts.

WARNING: Mounting brackets must be secured in accordance with local

codes. If in doubt, consult a professional contractor to determine the integrity

of the structure to which the bracket will be attached.When required, a safety

cable can be secured to the back of the speaker using the threaded brass insert

on the back of the speaker housing and the forged steel safety bolt (included).

MOUNTING THE SPEAKER ON THE YOKE

The A12 yoke allows the speaker to be

slipped onto it with the locking knobs at-

tached. First, both knobs need to be removed

and the supplied rubber friction disks applied

to the speaker enclosure where the knobs

clamp. Do not apply the friction disks directly

to the mounting knobs. Next, screw the

knobs back onto the enclosure about two

turns and simply slide the knob shafts down

the slots in the yoke. Now tighten the knobs

making sure that the shoulder of the knob

seats properly through the large hole at the

end of the yoke.

SOME FACTORS TO CONSIDER

Distance is not the only factor affecting sound intensity.Also consider what ad-

jacent surfaces may affect the sound (including but not limited to buildings,

walls, and overhangs).These structures may provide positive effects (low fre-

quency reinforcement) or negative effects (high-frequency reflections that will

degrade intelligibility).

TOP-DOWN VIEW

WALL MOUNT 90° WALL/CEILING MOUNT

(Secure both ends)

Low-impedance:

Remove jumper, use

COM (–) and 16

terminals.

Jumper can be installed on

any two unused terminals

for safe keeping.

REAR-PANEL CONNECTIONS

70V:

With jumper in place, use

COM (–) and one tap

selection (choose 8, 16,

32, 64, or 128 watts).

Shown without jumper

UNDERPOWERING VS. OVERPOWERING

Surprisingly, speaker damage can be caused by amplifiers with too little power.

An underpowered, overdriven amp sends heavily distorted, clipped audio to the

speakers.This can damage the high-frequency drivers. Clipping is usually audible;

it may vary from a harsh sound to a fuzzy or blurry sound. If you hear clipping

at loud volume levels, turn down the volume until the distortion is no longer

present.

On the other hand, overpowering a speaker can cause mechanical damage or

electrical failure by overstressing the speaker’s components.The speaker must

be powered appropriately to ensure its longevity and performance.

PAINTING

The speaker enclosure and grille can be painted with automotive paints or

spray paints specially designed to adhere to plastics. Perforated grilles require

special care when painting so that the holes do not become plugged with paint.

Applying several very light coats works best. Be sure to mask the port and horn

throat scrim so that no paint will get on those items.

70V SYSTEM CONFIGURATION

Shown with jumper in place

To next speaker

This example uses the 16W tap.

In a real installation, any of the

five 70V taps (8W, 16W, 32W,

64W, or 128W) may be used.

From amp

When designing a 70V system, the total of all the power tap settings of all the

connected speakers cannot exceed the output power of the 70V amplifier.The

example below shows five speakers connected in parallel. Using the 16W termi-

nals, an amplifier is needed with a power rating of at least (5) ×(16) = 80W. A

good rule of thumb is to select an amplifier with 20% more power; in this case,

an amplifier that delivers about 100W.

When using multiple low-impedance speakers wired in parallel, it is important

to know the total load that these speakers present to the amplifier and to

select an amplifier that is stable into that load.The A12 has a 16-ohm input im-

pedance which allows for easy paralleling of multiple speakers. In the example

on the next page, four speakers are paralleled on each amplifier output, so that

each run has a total impedance of 4 ohms.The amplifier is selected to be stable

into this load impedance.

LOW-IMPEDANCE SYSTEM CONFIGURATION

16 16 16 16

AMPLIFIER WITH DUAL 4 OUTPUTS

4 SPEAKERS PER CHANNEL CONNECTED IN PARALLEL

Example of Low-Impedance System Configuration

To next speaker

From amp

Jumper has been removed

Jumper stored here for safe keeping

Total load impedance can be calculated this way:

Rs is the impedance of the speaker, for the A12 it is equal to 16 ohms.

Note: If all speakers are the same Rs , it is simply:

Low-impedance amplifiers have power ratings based on driving a particular load

impedance, typically a 4-ohm load. Some rate power into an 8-ohm load. If the

speaker load’s impedance is greater than the amplifier’s rated impedance, the

speaker will not consume the amplifier’s total rated power. Since the A12 is a

16-ohm speaker, operating a single A12 with an amplifier rated for 4 ohms will

result in the A12 speaker consuming only 1/4 of the amplifier’s maximum capac-

ity. Likewise a single A12 will consume only 1/2 of the power capacity of an am-

plifier’s 8-ohm power rating. Most real world applications will require more

than a single A12, and paralleling the speakers will decrease the total impedance

of the load as mentioned above.

(1/Rs + 1/Rs ... 1/Rs)

1= Total Load Impedance

# of Speakers

Rs = Total Load Impedance

LIMITED WARRANTY; EXCLUSION OF CERTAIN DAMAGES

The NEAR A12 is warranted to be free from defects in material or workmanship for five (5)

years from the date of sale to the original purchaser. Any part of the product covered by

this warranty that, with normal installation and use, becomes defective will be repaired or

replaced by Bogen, at our option, provided the product is shipped insured and prepaid to:

Bogen Factory Service Department, 50 Spring Street, Ramsey, NJ 07446, USA. The prod-

uct will be returned to you freight prepaid. This warranty does not extend to any of our

products that have been subjected to abuse, misuse, improper storage, neglect, accident,

improper installation or have been modified or repaired or altered in any manner whatso-

ever, or where the serial number or date code has been removed or defaced.

THE FOREGOING LIMITED WARRANTY IS BOGEN’S SOLE AND EXCLUSIVE WAR-

RANTY AND THE PURCHASER’S SOLE AND EXCLUSIVE REMEDY. BOGEN MAKES

NO OTHER WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, AND ALL

IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR

PURPOSE ARE HEREBY DISCLAIMED AND EXCLUDED TO THE MAXIMUM EXTENT

ALLOWABLE BY LAW. Bogen’s liability arising out of the manufacture, sale or supplying

of products or their use or disposition, whether based upon warranty, contract, tort or oth-

erwise, shall be limited to the price of the product. In no event shall Bogen be liable for spe-

cial, incidental or consequential damages (including, but not limited to, loss of profits, loss

of data or loss of use damages) arising out of the manufacture, sale or supplying of prod-

ucts, even if Bogen has been advised of the possibility of such damages or losses. Some

States do not allow the exclusion or limitation of incidental or consequential damages, so

the above limitation or exclusion may not apply to you. This warranty gives you specific

legal rights, and you may also have other rights which vary from State to State.

7/22/2008

SPECIFICATIONS A12

Frequency Response (-10 dB)*55 Hz to 17.5 kHz

LF Driver Dual Metal-Composite 6-1/2" Cone Woofers,

Patented MLS Voice Coil Guidance System

HF Driver Weatherproof 1.9"Mylar Diaphragm

Constant Directivity Horn, 1" Exit

Sensitivity (1W/1M) 94.5 dBspl

Dispersion 90° Horizontal, 45° Vertical

Impedance Ratings Low (16 ohms) / High (70V)

Power Input (Max.) 225W @ 16 ohms; 128W @ 70V

Power Settings (in watts) 70V: 128, 64, 32, 16, 8

Grille Material Perforated Polypropylene

Enclosure Material Mineral-filled Polypropylene, with UV Inhibitor

Terminations Dual 4-Terminal Barrier Strips with Gold-plated

Rust-proof Screws

Product Weight 22 lb.

Speaker Dimensions 10-1/4"Wx17-7/8" H x 10-7/8" D

Included Accessories Color-matched, Stainless Steel Mounting Bracket

Optional Accessories Adjustable Tilt-Mount Adapter

(Model TMA812, sold separately)

Environmental Meets or Exceeds Mil-Std-810E

* Half-space response

50 Spring Street, Ramsey, New Jersey 07446, USA

201-934-8500 FAX: 201-934-9832

www.bogen.com

Inhaltsverzeichnis

Andere Bogen Lautsprechersystem Handbücher

Bogen

Bogen AS1 Leitfaden

Bogen

Bogen AS1 Leitfaden

Beliebte Lautsprechersystem Handbücher anderer Marken

JVC

JVC CA-MXK5R Bedienungsanleitung

LG NB4532B Bedienungsanleitung

JVC

JVC CA-FSH100 Bedienungsanleitung

5Core

5Core Pro Series Bedienungsanleitung

EAW

EAW MQV1394e Bedienungsanleitung

Lynx

Lynx GXR-LA10A Bedienungsanleitung

iLive

iLive ITB066B Bedienungsanleitung

RDX

RDX QuickStation 4 Bedienungsanleitung

Electro-Voice

Electro-Voice S-122 Bedienungsanleitung

Sven

Sven SPS-619 GOLD Bedienungsanleitung

Pioneer

Pioneer CS-7070 Bedienungsanleitung

EAW

EAW UB82e Bedienungsanleitung

Sondpex

Sondpex Active Speaker System and Digital Music... Bedienungsanleitung

JVC

JVC NX-PN7 Bedienungsanleitung

Yamaha

Yamaha NX-A01 - Speaker Sys Bedienungsanleitung

SE Audiotechnik

SE Audiotechnik I-LINE Bedienungsanleitung

Gemini

Gemini WRX-843 Series Bedienungsanleitung

TCL

TCL 6100 Series Bedienungsanleitung