Introduction; Lend Me Your Ears - Mackie HR824 Owner's Manual

Lend Me Your Ears

Exposure to extremely high noise
levels may cause permanent hearing
loss. Individuals vary considerably in
susceptibility to noise-induced hear-
ing loss, but nearly everyone will lose
some hearing if exposed to sufficiently
intense noise for a period of time. The U.S.
Government's Occupational Safety and Health Ad-
ministration (OSHA) has specified the permissible
noise level exposures shown in this chart.
Duration Per Day
In Hours
8
6
4
3
2
1.5
1
0.5
0.25 or less

INTRODUCTION

Thank you for choosing Mackie Designs'
HR626 Studio Monitors. We realize that moni-
tors are a critically important tool whether
your application is studio recording, audio/
video post production, hi-fi, or home theater.
Knowing this, Greg Mackie had a simple man-
date: Design a reference monitor with a degree
of accuracy and versatility unmatched by any
other in its size and price category — or any
size and price category for that matter. The
mandate was simple, but accomplishing it was
another story!
Investments in Excellence...
To accomplish the task at hand, Greg and
the New Product Development team realized
that a commitment was required in terms of
new resources and new equipment. So we re-
cruited some of the best speaker and acoustic
engineers in the industry to assist in the design
of our first studio monitor, the HR824. And we
invested in some advanced (and need we say
expensive) measurement and analysis tools for
the design team to use.
The result? The HR824 Studio Monitors,
and their siblings the HR624 and HR626, are
extremely accurate and versatile, loaded with
unique controls that allow you to fine-tune the
sound to match your individual environment
precisely. You're gonna love these!
According to OSHA, any exposure in excess of
these permissible limits could result in some hear-
ing loss. To ensure against potentially dangerous
exposure to high sound-pressure levels, it is recom-
mended that all persons exposed to equipment
capable of producing these levels use hearing pro-
tectors while this unit is in operation. Ear plugs or
protectors in the ear canals or over the ears must
be worn when operating this amplification system
in order to prevent a permanent hearing loss if
exposure is in excess of the limits set forth here.
Sound Level dBA, Typical
Slow Response Example
90 Duo in small club
92
95 Subway Train
97
100 Very loud classical music
102
105 Patrice screaming at Ron about deadlines
110
115 Loudest parts at a rock concert
What are they? The Advantages...
The HR626 Studio Monitors are high-resolution,
two-way, bi-amplified, active monitors employ-
ing a 6th-order Butterworth system with a
built-in rear-firing mass-loaded passive radiator.
Whew! There are many benefits to integrating
an active crossover, power amplifiers, and driv-
ers into a single cabinet, and we've taken full
advantage of these benefits in the design of the
HR626.
• The crossover point is designed so that the
high and low frequency drivers are fed only
the frequencies they are best able to
reproduce.
• The amplifiers are designed to provide
maximum acoustic output from the
speakers, yet minimize the danger of
speaker damage due to overdriving.
• In addition, the amplifiers' gain and
frequency responses are individually hand-
trimmed to compensate for typical
manufacturing tolerances between the
drivers and produce a smooth frequency
response from 42Hz to 20kHz (±1.5 dB).
• The connecting wire between the amplifier
outputs and the drivers are kept to an
absolute minimum, so the damping factor
of the amplifier isn't compromised by the
resistance of long speaker cables.
The HR626
can produce a
maximum SPL of
118 dB @ 1m
3