Bogen A2 User manual

DescriptionFeatures*
*A6 and A8 models described in more detail on separate
specification sheets.
Additional information at www.nearspeakers.com
• Indoor and outdoor all-weather speaker with
fully-sealed cabinet
• Available versions: 8-ohm and 70V
• Available colors: black, green, and white
• Metal-alloy MDT™ mid/bass speaker cone delivers
natural sound with ultra-low distortion
• Extremely stable, long-lasting MDT cone structure
• High-efficiency and power handling for optimum
performance
• Dual-layer voice coil with separate inner and outer
windings for high output with ultra-low distortion
• Patented MLS™ fluid voice coil suspension replaces
distortion-causing mechanical spider
• Compound rubber surrounds resist UV rays
and salt spray
• Gold-plated, rust proof connectors
• High-density, injection-molded cabinet resists
chipping and scratching
• Low-resonance cabinet structure
• Easy-to-grasp multi-faceted mounting brackets
with 180oswivel
• Easy to grip, oversized mounting knobs
• Brackets mount with knobs attached for easier
and safer installation in hard-to-reach locations
• Heavy-gauge aluminum (A2 & A6 models) or
stainless steel (A8 models) brackets
• Corrosion-resistant driver frame & mounting
hardware
• Attractive styling with “Armadillo” ridges for stiffness
• Coaxial (A2 models) or 2-way speaker
systems (A6 & A8 models)
NEAR A-Series Armadillo®loudspeakers feature NEAR’s unique
technologies that improve sound quality and operating reliability.
Attractively styled, they are engineered for both indoor and out-
door applications. The compact A2 models are designed for
smaller spaces.Their high audio intelligibility and superb articula-
tion make them ideal for music or paging applications. The A6
models are conveniently sized, 2-way designs with high-power
handling for applications such as restaurants, health clubs, and
patio and pool areas. The A8 models are high-output 2-way
designs for larger spaces such as clubs, auditoriums, and theme
parks. 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
Specifications subject to change without notice.
© 2000 Bogen Communications, Inc.
Part No. 54-8008-01R2 Printed in U.S.A. 0210
A-Series
All-Environment
Loudspeaker
Models A2, A2T

Technical
Specifications
The loudspeaker shall be a NEAR Model A2 (8-ohm) or
Model A2T (70V) in Black (BLK), White (WHT) or Green
(GRN) or approved equivalent loudspeaker consisting of
one 6-inch nominal low frequency transducer, one 1/2-inch
nominal high frequency transducer mounted coaxially, with
a filter network for dividing frequencies between the trans-
ducers. A weather-tight enclosure shall house all compo-
nents.The enclosure shall be constructed from an injection-
molded, high density (30% or greater), mineral-filled
polypropylene material compounded with UV inhibitors.
Three molded-in colors shall be made available (Black,
White, and Green). Perforated speaker grilles shall be made
from heavy-gauge PVC, color-matched to the enclosure.
The low frequency driver shall utilize a metal-alloy cone
with deep-anodized surface treatment for rigidity and cor-
rosion resistance.The cone shall provide a heat transfer ele-
ment for the voice coil under high power input.
Compounded rubber cone surrounds shall be formulated to
withstand all-environment installations, including salt spray,
ultraviolet light (UV), heat, cold, and constant humidity.The
voice coil will be centered via a high gauss, low viscosity
magnetic fluid (ferrofluid), which increases the heat transfer
rate from the voice coil under long-term, high-power use.
The magnetic fluid shall prevent corrosion from occurring in
the magnet gap.
The high frequency driver shall utilize an environmentally
stable polycarbonate diaphragm. Ferrofluid shall dampen the
voice coil and assist in the heat transfer for higher power
capability.
Environmental testing shall ensure long-term operation in
any weather. Specifications shall exceed Mil-Std-810E Test
Methods for Temperature, Humidity, Ultra-Violet Light, and
Salt Spray.
The mounting bracket shall be designed with multiple angles
to facilitate installation in corners or when angulation is
required. An integral safety strap mounting point shall be
included. The loudspeaker shall rotate, on its axis, a mini-
mum of 180o.The bracket shall be formed from heavy-gauge
aluminum (minimum 3mm thick), and finished with a
scratch-resistant paint (color-matched to the enclosure).
The input connectors for 8-ohm and 70-volt systems shall
be gold-plated screws with integral clamping washers.
Dimensions of each speaker shall not exceed 9" Diameter x
8" Deep. Weight shall not exceed 8 lb. (A2), and 10 lb.
(A2T).The speaker shall be a NEAR Model A2 (8-ohm) or
Model A2T (70V) in Black (BLK), White (WHT) or Green
(GRN).
Architect & Engineer
Specifications*
MODEL NUMBER A2 A2T
Frequency Response (-10 dB)*55 Hz to 20 kHz
LF Driver 6" MDT Metal-Alloy Cone
HF Driver 1/2" Polycarbonate
Sensitivity (1M/1W, 8-ohm) 88 dBspl
Impedance 8-ohm 70V
Power Handling 100W 16W
Additional Taps - 8W, 4W
Product Weight 8 lb. 10 lb.
Cabinet Material Mineral-Filled Polypropylene, UV-inhibitied
Speaker Dimensions 9" dia. x 8" D
Terminations Gold-Plated, Rust Proof Barrier Strip
Environmental Meets or exceeds Mil-Std-810E
Included Accessories Color-Matched Aluminum Mounting Bracket
Cabinet Color Black, Green,White
*Half-Space Response
* Specifications available on CD and on Bogen’s web site for easy downloading.

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Off-Axis Response
Because the A2 has a co-axial
design, all off-axis responses are
the same.
Frequency Response
(Half-space @ 1M/1W, 8-ohm)
Polar
Response
16W
8W
4W
1W/8-ohm
40 deg
30 deg
20 deg
10 deg
0 deg
500 Hz
1 kHz
2 kHz
4 kHz
8 kHz
16 kHz
(dBspl)
(Hz)
(dB)
(Hz)

50 Spring Street, Ramsey, NJ 07446, USA
Tel: [phone] • Fax: [phone]
www.bogen.com
Mechanical Drawings