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INTRODUCTION
Thank you for choosing LOUD Technologies’ Mackie
active sound reinforcement speakers.
The SRM350v2 is a redesigned version of our popular
SRM350 active loudspeaker. With its newly designed Class-D
Fast-Recovery amplifiers, high-output compression driver
and 10" woofer, it produces an even smoother sound than
the original. SRM means Sound Reinforcement Monitor,
and the SRM350v2 truly produces a studio quality sound in
a sound reinforcement speaker.
Our design goal was to build a sound reinforcement
speaker with:
1. High precision, high output, and accurate playback.
2. Very wide, smooth dispersion of mid and high frequencies.
3. Ergonomically correct physical design for easy transport
and set up.
Through the combined resources of our top-notch
mechanical and analog engineers, and our experienced
transducer engineers at EAW, we were able to achieve our
design goals in every aspect. The result is a sound
reinforcement system equally at home in a concert setting,
in the studio, impromptu concerts on the studio roof, in
the cinema, or in a home theater.
The Transducers
The SRM350v2 active speakers feature a 10-inch
high-power low-frequency woofer, and a 1.4-inch titanium
diaphragm high-output compression driver. This
high-frequency driver is mounted on an acoustically
non-resonant exponential waveguide, providing a wide,
controlled dispersion and precise reproduction of the
critical upper mid-range and high frequencies. The result
is an unbelievably smooth off-axis response that allows
everyone in the audience to experience the same
high-resolution audio no matter where they are seated.
The Power Amplifiers
To power these beauties, each SRM350v2 includes two of
our acclaimed FR Series “Fast Recovery” power amplifiers.
In addition, the low-frequency amplifier uses a Class-D
design for improved efficiency and cleaner power. Our
exclusive designs use low negative feedback, yet allow the
amplifiers to maintain low distortion and stability and to
quickly recover when driven into clipping.
The amplifiers include the following features:
• The low-frequency amplifier produces 165 continuous
watts before clipping.
• The high-frequency amplifier produces 30 continuous
watts before clipping.
• When the output from either amplifier begins to clip,
a limiter gently reduces the input signal level until the
output is no longer clipping.
• The low-frequency amplifier also has a Dynamic Bass
Boost circuit. Our ears are more sensitive to bass
frequencies at high volume levels than at softer
volumes. This unique circuit automatically reduces
the low frequencies below 70 Hz as the volume of the
speakers goes up. This results in improved efficiency for
the low-frequency amplifier because it is not wasting
power trying to reproduce frequencies we hear
better at loud volumes. Instead, the power is used
for the frequencies where it is needed, resulting in
a louder sound.
Warning:
Although the amplifiers
have these protection circuits, you
must still make sure the LIMIT light
is not blinking continuously. If it
is, turn down your mixer faders, or
preamplifier gain, or turn down the
SRM350v2 LEVEL control.
The Crossover
The built-in electronic crossover is a 24 dB/octave
Linkwitz-Riley design. Although more expensive than other
crossover designs, the benefits provided by the Linkwitz-
Riley design have been well documented. These benefits
include:
• Absolutely flat frequency response throughout the
bandpass, without the characteristic ripple near the
crossover point exhibited by other designs.
• The sharp 24 dB per octave roll-off of the filters ensures
that the transducers aren’t reproducing frequencies
outside of their capabilities.
• The acoustic sum of the two driver responses is unity
at the crossover frequency, resulting in perfect power
response.
• Our heroic engineers have worked carefully to
ensure that the SRM350v2 also provides perfect phase
response. This diligence has yielded phenomenal
accuracy, even if you are standing 20 feet away.
The Cabinet
The SRM350v2 cabinet was designed to be the strongest
molded composite cabinet on the planet (Earth). This
material is as strong as concrete, and rigid enough to
prevent unwanted vibrations in the cabinet. An optional
bracket kit is available for the top and bottom of the
cabinet to be used for flying, and a socket is provided in
the bottom of the cabinet for mounting on a tripod stand.
Although it is an exceptional choice for installed sound
situations, its light weight and durable finish also make it
ideal for portable sound system use. The asymmetrical
trapezoidal design of the cabinet makes it easy to use as a
floor wedge for stage monitor applications.
