Aphex Systems 519B

Aphex Systems 519B

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. 

Overview

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.

Why It's Needed

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.

 FEATURES

¡         For TOA 900, Raymer 9000 and Peavey MA Series Power Amplifiers

¡         Increases Presence and Clarity

¡         Increases Intelligibility

¡         Provides Greater Perceived Loudness

¡         Adds Perceived High End to Dull or previously Low Pass Filtered Material

¡         Model 520D Automatically Mutes for Priority Input

APPLICATIONS

¡         Bass Contour Jumper Selectable

¡         P.A. Systems

¡         Paging Systems

¡         Background and Foreground Music Systems

¡         Stage Monitors

¡         Increase Presence and Clarity

¡         Increase Intelligibility

¡         Provide Greater Perceived Loudness

¡         Add Perceived High End to Dull or Low Pass Filtered Material

SPECIFICATIONS - Aphex 519B Aural Exciter™ Modules for TOA 9000

AUDIO

¡         Frequency Response: 20Hz - 20 kHz (± 0.5dB) Mix at minimum, Bass Boost jumpered for 0dB boost

¡         Hum and Noise: -92 dBu, MIX at minimum, 22Hz-22kHz

¡         THD: <.01% @1kHz, +8dBm

¡         Bass Boost Range: 0, +6, +12dB, jumper selectable

¡         Tune Range: n/a

INPUT

¡         Connectors: RCA Type, female

¡         Nominal I/O Levels: -10dBm to -30dBm

¡         Nominal Input Level

¡         Maximum Output: +19 dBm

¡         Input Impedance: 12k ohms

¡         Output Impedance: 150 ohms

OTHER SPECIFICATIONS

¡         Power Requirements: +24VDC @ 23 ma

¡         Dimensions: 3.08"H x 1.38"W x 3.46" D (78mm x 35mm x 88mm)   Dimensions 3.08"H x 1.38"W x 3.46" D  (78mm x 35mm x 88mm