Bogen A2-T, A6-T, A8-T Service Manual

A2

A6

A8

54-2033-02C
Printed in Taiwan 0305

OWNER’S GUIDE

MODELS A2, A6, A8, & VARIATIONS

A-SERIES ENVIRONMENT-PROOF

INDOOR/OUTDOOR LOUDSPEAKERS

NNEEAARR AA-SSEERRIIEESS EENNVVIIRROONNMMEENNTT-PPRROOOOFF IINNDDOOOORR//OOUUTTDDOOOORR LLOOUUDDSSPPEEAAKKEERRSS

BRACKET INSTALLATION

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 user-supplied safety strap can be secured to the back of the speaker cabinet using the
threaded brass insert and supplied screw.

MULTIPLE SPEAKERS AND SOUND COVERAGE

Placement is critical when the goal is smooth, even sound coverage of an area. Horizontal and vertical
dispersion usually vary with 2-way speakers, so installation orientation should be consistent. Models A6 and A8
deliver about 110 and 100 degrees of horizontal sound coverage, respectively, while the coaxial A2 provides
about 90 degrees.Too great a distance between any 2 speakers will create a dead spot in the coverage.When
in doubt, use more speakers to ensure adequate coverage.

OTHER FACTORS TO CONSIDER

Distance is not the only factor affecting sound intensity. Others that should be considered in the planning
phase are adjacent surface reinforcement and environmental effects such as temperature extremes and
humidity (mainly in outdoor installations).

LOW FREQUENCY OUTPUT

Bass output level depends on a speaker’s location. The more reflecting surfaces in proximity to the speakers
(walls, ceilings, floors), the greater the bass output. Therefore, speakers mounted in free space (e.g., hanging
from an overhead support) will produce comparatively less bass output.

UNDERPOWERING VS. OVERPOWERING

Most speaker damage is caused by amplifiers with too little power.An overdriven amp sends clipping distor­tion to the speakers. 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.
Damage caused by operating the speakers at distorted volume levels is not covered by the warranty.

PAINTING

The speaker cabinet and grille can be painted with a thin coat of spray paint.Remove the grille and mask the
speaker assembly so that only the cabinet gets painted. Then, if desired, spray the grille lightly to avoid
plugging the holes.

MAINTENANCE

None required. Speaker cabinets can be wiped clean with a soft, damp cloth.

NOTE:The total number of speakers multiplied by the tap value cannot exceed the output power (in watts)
of the 70V amplifier.The above example shows 5 speakers. Using the 16W taps, you need an amplifier with
at least (5) x (16) = 80W. A good rule of thumb is to select an amplifier with 20% greater power; in this case,
an amplifier that delivers about 100W.

Observe correct
polarity for maximum
bass performance.

BACK PANEL OF 70V MODELS

EXAMPLE OF 70V SYSTEM CONFIGURATION

EXAMPLE OF 8ΩΩSYSTEM CONFIGURATION

BACK-PANEL CONNECTIONS

BACK PANEL OF 8ΩΩMODELS

SPECIFICATIONS

MODEL NUMBER A2 / A2T A6 / A6T A8 / A8T

LF Driver 6" MDT 6" MDT 8" MDT

HF Driver

Freq. Response (-10 dB)

Impedance 8-ohm / 70V 8-ohm / 70V 8-ohm / 70V

Power Handling

(8-ohm/70V)

Sensitivity (1M/1 W, 8-ohm)

Additional Taps (70V) 8W, 4W

Dispersion Angles

Speaker Dimensions 9" dia. x 8" D

Product Weight

Terminations Gold-Plated, Rust Proof Barrier Strip

Cabinet Color Black, Green,White

*

Half-Space Response

*

1

/2" Polycarbonate

55 Hz to 20 kHz 50 Hz to 20 kHz 45 Hz to 20 kHz

100W / 16W 150W / 32W 175W / 64W

88 dBspl 89 dBspl

Horiz. - 90°

Vert. - 90°

8 lb. / 10 lb. 11 lb. / 12 lb. 18 lb. / 20 lb.

1" Titanium 1" Titanium

91 dBspl

16W, 8W 32W, 16W

Horiz. - 110°

Vert. - 45° (up), 35° (down)

71/8" W x 137/16" H x 711/16" D 101/4" W x 177/8" H x 107/8" D

Horiz. - 100°

Vert. - 45° (up), 35° (down)

NEAR TECHNOLOGIES

NEAR® A-Series Armadillo® loudspeakers feature NEAR’s unique technologies that improve
sound quality and operating reliability. All models feature NEAR’s MDT (Metal Diaphragm
Technology) and MLS (Magnetic Liquid Suspension).

Unique MDT™ (Metal Diaphragm Technology):

• High rigidity and low mass of metal versus traditional papers and plastics

• Extremely stable cone structure over long periods of time

• Fast transmission of sound through the diaphragm means low energy storage

• Special anodizing process creates a ceramic coating for increased stiffness

• Efficient heat-sinking of voice coils under long-term, high-power situations

Patented MLS™ (Magnetic Liquid Suspension):

• Voice coil is constantly centered for lower distortion

• Voice coil is more efficiently heat-sinked by fluid instead of air

• Greater linearity is accomplished because the mechanical spider is eliminated

• Constant lubrication of the gap prevents oxidation from outdoor use

Ramsey, NJ 07446 U.S.A.

201-934-8500 • Fax [phone]

e-mail: [e-mail]

Specifications are subject to change without notice. ©2000 Bogen Communications, Inc.

• www.nearspeakers.com