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Models 519B and 520D
Aural Exciters are plug-in modules that fit TOA 900, Raymer
9000, and Peavey MA Series power amplifiers. The Aural Exciter
is an audio processor that provides many benefits to the end
user, including greatly improved presence and intelligibility
without altering any other part of the audio system.
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| Overview |
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The Aural Exciter
is a powerful processing tool that has been used and acclaimed
by the recording and broadcast industries since 1975, and
has found countless new applications since then in sound reinforcement,
paging and P.A., tape duplicating, and background music systems.
An Aural Exciter can be used to benefit any sound system.
Until recently, one had to purchase a complete piece of outboard
equipment to enjoy the benefits of the Aural Exciter, but
advances in technology made it possible to include the heart
of the process on a small card to plug into an existing piece
of equipment, in this case the TOA 900 Series, Raymer 9000
Series, and Peavey MA Series power amplifiers.
The 519D or 520D
installs in one input module space in the rear of the amplifier,
taking its power from the amplifier. Both models feature a
jumper selectable Bass Boost for 0, +6 or +12 dB boost.
The 519D connects
to the amplifier's Preamp OUT and Amp IN jacks on the rear
with a standard phono type cord, and processes the entire
amplifier output.
The 520D is a
single channel input card. Its RCA type phono jack takes any
line level unbalanced input. The operating level may be selected
for -10 or +4dBm.
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| Why It's Needed |
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The audio reproduction
process is far from perfect, even under the best of circumstances.
Every step causes some degradation of the audio signal. What
is happening involves the loss of some of the harmonics or
overtones of the sound, the fragile parts that give it intelligibility.
Equalizers cannot restore clarity and realism because they
can only work on what's left of the original sound, often
increasing noise and distortion in the attempt.
Although the
initial impression of the Aural Exciter is often that it is
some form of EQ, a comparison soon proves the difference.
Equalizers are a static, fixed process, and they cannot boost
what is no longer there. Equalizers can also add considerable
power to the amplifier output, possibly causing amplifier
clipping, speaker damage, ear fatigue and/or increased reverberation.
The Aural Exciter
is a dynamic process that actually recreates the missing harmonic
material and adds it back in the form of a very small cue
signal. Because the enhancement signal is so small, it adds
little power to the audio signal. It is easily reproduced,
even by low quality systems, and is not affected by acoustic
problems, such as "dead zones" or reverberant fields.
Because the harmonics or overtones created are derived from
the main signal and are musically and dynamically related,
the result is very natural and pleasing to the ear, and sounds
"correct"..
Aural Exciter
is a proprietary process, patented worldwide and cannot be
duplicated by any other means than a genuine Aural Exciter.
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| FEATURES |
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For TOA 900, Raymer
9000 and Peavey MA Series Power Amplifiers |
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Increases Presence
and Clarity |
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Increases Intelligibility |
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Provides Greater Perceived
Loudness |
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Adds Perceived High
End to Dull or previously Low Pass Filtered Material |
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Model 520D Automatically
Mutes for Priority Input |
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| APPLICATIONS |
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Bass Contour Jumper
Selectable |
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P.A. Systems |
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Paging Systems |
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Background and Foreground
Music Systems |
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Stage Monitors |
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Increase Presence
and Clarity |
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Increase Intelligibility |
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Provide Greater Perceived
Loudness |
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Add Perceived High
End to Dull or Low Pass Filtered Material |
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| SPECIFICATIONS
- Aphex 519B / 520D Aural Exciter™ Modules
for TOA, Raymer, Peavey |
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| AUDIO |
MODEL
519B |
MODEL
520D |
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Frequency Response |
20Hz -
20 kHz (±
0.5dB) Mix at minimum, Bass Boost jumpered for 0dB
boost |
same |
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Hum and Noise |
-92 dBu,
MIX at minimum, 22Hz-22kHz |
-85 dBu,
MIX at minimum, 22Hz-22kHz
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THD |
<.01%
@1kHz, +8dBm |
same |
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Bass Boost Range |
0, +6,
+12dB, jumper selectable |
same |
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Tune Range |
n/a |
1kHz to
5.6kHz |
| INPUT |
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Connectors |
RCA Type,
female |
same |
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Nominal
I/O Levels |
-10dBm
to -30dBm |
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Nominal
Input Level |
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-10dBm
or +4dBm |
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Maximum
Output |
+19 dBm |
same |
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Input
Impedance |
12k ohms |
37k ohms |
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Output
Impedance |
150 ohms |
same |
| OTHER
SPECIFICATIONS |
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Power Requirements |
+24VDC
@ 23 ma |
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Dimensions |
3.08"H
x 1.38"W x 3.46" D (78mm
x 35mm x 88mm) |
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