Apogee APL-220, Руководство пользователя

Страница: 7 / 44

The Concept
of Integration Why a Powered Loudspeaker?
Apogee’s powered speaker systems further the company’s original concept
of processor-based loudspeakers. By combining advanced electronic signal
processing with precisely matched amplifiers, and integrating this package
into the speaker enclosure itself, a number of engineering improvements
result. Some of these are:
• The internal signal processor corrects driver and enclosure anomalies, and
provides required crossovers, time-domain alignment, and protection cir-
cuits.
• The amplifier’s power output, headroom, frequency response and dynamic
range are optimized for each model of loudspeaker system.
• The gain structure of the signal processor and amplifiers are always per-
fectly matched.
• An integrated speaker system is able to use voltage sensors to provide
information to the processor’s protection circuits. The result is more accu-
rate control of the drivers’ mechanical and thermal limits, and therefore
better protection under abusive conditions.
• The amplifier output cables are kept to very short lengths, thereby reduc-
ing cable losses to nearly zero.
Introduction
Apogee Powered Loudspeaker Systems are highly-engineered products that
combine advanced-technology amplifiers, sophisticated signal processing, and
state-of-the-art drivers housed in rugged, roadworthy loudspeaker enclo-
sures. They are suitable for a wide variety of applications, ranging from
portable use for shows and events in all types of venues to permanent instal-
lations in auditoriums, churches, theaters, stadiums, meeting rooms, board-
rooms, and similar locations.
The APL-220, APL-500, and APL-800 are compact, bi-amplified speaker sys-
tems capable of providing clean, undistorted sound at very high output lev-
els. They easily form acoustically-correct arrays when used in multiples.
Although deceptively small in size, they are capable of fulfilling an astonish-
ingly wide range of professional sound reinforcement requirements due to
their wide-range response, predictable pattern control, excellent sonic qual-
ity, and easy arrayability.
Apogee powered products are exhaustively engineered and finely crafted.
They will provide years of trouble-free service if care is taken in their use and
maintenance. It is recommended that you read this manual and retain it in a
convenient location for future reference.
7