Aphex 323A

The Aphex Model 323A represents the most recent iteration of the popular Compellor / Aural Exciter, a single channel dynamics processor and program enhancer. The model 323 A permits absolute control over program dynamics, a benefit made possible by the patented Compellor processor. The Aural Exciter section enhances and restores program material, resulting in increased audio presence, intelligibility, and articulation.

A significant improvement in this version of the Compellor / Aural Exciter over its predecessor is the addition of a newly developed (patents pending) Frequency Discriminate Leveler (FDL) circuit. Exhaustive research by Aphex engineers led to the discovery that, under conditions of program leveling, the human ear perceives the onset of low frequency (bass and percussion) transients differently than transients at higher frequencies. This perception, as it turns out, is a direct function of the relative attack time of the leveler. Without FDL, there is a significantly greater chance that low frequency transients can create an audible "bass pull back" effect. In addition to potential loss of bass and/or low end "punch", mid and high frequency processing can be negatively impacted. To the listener, the effect can at times be heard as a perceived loss of bass or even a pumping effect at the mid and treble frequency ranges.

FDL eliminates this problem causing low frequency transients to generate a slower attack time on the initial transient. High frequency leveling is still controlled within the attack time determined by the onboard computer. From the listener's standpoint, the benefits are:

• No more bass pullback effect
• Fast leveling can be used in more applications
• More bass punch for better music mixes
• Reduced audio distortion in the leveling mode

Compellor Features

• Compressor - Smooth and transparent compression action due to intelligent attack and release control, the result of on-board Dynamic Verification Gate™ (DVG) and Dynamic Recovery Computer™ (DRC) analog control computers
• Leveler - Delivers undetectable Automatic gain Control (AGC) for maximum stability of program levels
• Peak Limiter - Protects system components from sudden and potentially damaging peaks. Defeatable from a front panel switch
• "Straight Wire" Sound Quality - Employs the proven Aphex VCA 1001 for absolute audiophile quality sonic performance
• Logical Metering System - One button allows you to choose between Input, Output, or Gain Reduction levels; bi-color LED's
• Transformerless Servo-Balanced Input/Output Circuitry - Permits compatible interface with other balanced and/or single-ended components with no comprimise in performance. RF filtered
• Slow / Fast Leveling Speed - front panel selectable
• Selectable Nominal Operating Level - your choice of -10, +4, or +8 dbmoperating levels selectable via a back panel switch

Aural Exciter Features

• Contains the latest refinements in Aural Exciter technology
• Improved performance and reduced distortion

Overall Features

• Inputs and outputs trimmed for the highest Common Mode Rejection ratio (CMRR) assuring ultra quiet balanced line performance
• Premium Quality Power Supply - precision engineered toroidal power transformer, shielded and RF filtered for silent operation
• Remote controllable hardwire relay bypass
• Designed and manufactured in the USA