AH-5A BOGEN COMMUNICATIONS, AH-5A Datasheet - Page 71

• Manufacturer Part Number: AH-5A
• Description: Amplified Speaker/horn
• Manufacturer: BOGEN COMMUNICATIONS

Specifications of AH-5A

• Peak Reflow Compatible (260 C): No
• Leaded Process Compatible: No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

1
DESIGNING SELF-AMPLIFIED SYSTEMS
WHAT MAKES A SELF-AMPLIFIED SPEAKER?
Built-In Amplifier
As the name suggests, all self-amplified speakers contain their
own built-in, miniature amplifier. These amplifiers range in size
from 1 watt, which are used on cone speakers, up to 30 watts,
which are used on the SAH30 horn speakers.
Bogen’s latest line of self-amplified horns use a revolutionary digital
switching amplifier. Unlike conventional analog amplifiers, this
advanced technology produces very little heat when it operates.
It produces so little heat that all it needs to dissipate the waste
heat are the copper interconnecting traces on the printed circuit
board instead of the typical large aluminum heat sinks. Because
it produces so little heat, it also draws considerably less power
from the power supply. Why? Because it is not wasting half of the
power supply energy it consumes as heat.
More typical in the industry are speakers that employ analog
amplifiers, which produce considerable waste heat while oper-
ating. They typically release half the 24V power they consume
in the form of heat, and heat is a major contributor to the fail-
ure of an amplifier.
2
See pages 22 and 68 for more information.
1.
2.
or greater than the total
To determine the number of ceiling speakers
your installation requires, simply divide the
area’s total square footage by the speaker
coverage as indicated in this chart.
Select a Power Supply (or power supplies) with a
Add all the
and volume controls together.
Total Area
(Sq. ft.)
C E I L I N G S P E A K E R S
Determining
Quantities
Self-Amplified
÷
Determining
Power Supply Capacity
To determine total 24V DC Power Supply size
requirement, follow the steps below.
numbers of the Self-Amplified speakers for the system
Coverage
Speaker
=
amount for the system.
Speakers
Figuring out how many speakers you need for your application is simple.
•
•
# of
For Bogen’s Horn Speakers, you will need room dimensions and ambient noise levels.
For Bogen’s Ceiling and Wall Baffle Speakers, you will need room dimensions.
speakers your installation requires, simply
W A L L B A F F L E S P E A K E R S
Coverage is 600 sq. ft. per speaker
divide the area’s total square footage by
To determine the number of wall baffle
Total Area
(Sq. ft.)
number(s) equal to
Self-Amplified
600 square feet.
÷
Sq. ft.
600
The amplifiers in Bogen’s AH series of self-amplified horns are
analog but rid themselves of waste heat through their large cast
aluminum end bell that works as an excellent heat sink, quickly
and effectively removing excess heat. Competitive products using
plastic end bells don’t have this cooling advantage
4 Wires
All self-amplified speakers require 4 wires to make the neces-
sary connections. Two of the connections are used to provide 24V
DC power to the built-in amplifier. The other connection pair to a
self-amplified speaker is for the audio signal input.
The general audio signal level is the same as what you would find
on any analog telephone line. The input is transformer balanced,
also similar to the inputs found on telephone systems. The bal-
anced nature of the input greatly reduces interference and noise
caused by equipment running in the facility. The use of an actual
transformer provides electrical isolation between the input leads
and the actual amplifier, which protects it from ground loops and
RF interference, and provides an all-around rugged input.
=
Speakers
# of
To determine the number of horn loudspeakers
your installation requires, simply divide the
area’s total square footage by the speaker
coverage for the noise level in the area as
indicated in the chart below.
Total Area
See page 30 for
(Sq. ft.)
Power Supply
H O R N L O U D S P E A K E R S
Selection.
Self-Amplified
÷
Coverage
Speaker
See page 75 for
Wire Lengths.
Maximum
=
.
Speakers
# of
69