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The 9735 DynaMaxx Compressor / Limiter / Noise Gate from SPL is engineered to offer ease of use with signal-dependent automation of time constants. It offers de-compression features that are designed to regain vitality from over-compressed audio files.
The DynaMaxx is engineered to be the choice when unobtrusive, musical compression results and reliable set-and-forget operation are most important. SPL's Double-VCA Drive technology employs two VCAs in a differential mode for transparency, dynamics, and lower distortion values.
Though auto attack-and-release functions are nothing new, in the DynaMaxx design, the time constants are automated, and DynaMaxx's adaptively optimizes all time constants in real time during processing so that the compression characteristics are continually matched to the source material. This helps ensure both more musical and truly set-and-forget operation.
The DynaMaxx employs THAT 2181 VCAs, and the circuit actually uses two of these VCAs, which help increase transparency and dynamics while reducing noise and distortion. A great benefit of the DynaMaxx's double-VCA drive circuits is that high compression ratios are designed not to affect high-frequency details. High-amplitude, low-end bass can be controlled without introducing pumping or other negative side effects. Similarly, complex stereo sources can be processed more easily.
The DynaMaxx has numerous applications in recording and mixing as well as in sound reinforcement. Due to the level of intelligent processing within the unit, there are only two rotary controls to adjust per channel, simplifying the matter of adjusting the audio signal.
The Compression control sets the amount of compression, whereas the degree of gain reduction is continually monitored via the LED meters.
The Gain control is similar to the "make-up" gain control used on conventional compressors and is provided to restore signal levels that have been reduced by the compressor action. This control also compensates for any gain increase in De-Compression mode. The control has a range of 20 dB.
Soft Limit switches between Compression mode and Soft Limit mode for a very gentle soft-knee characteristic with minimized audible side effects.
In the Effect Compression mode, the Release time is set to a fixed 60 ms to produce a 'vintage compression' effect that works very well on solo instruments and occasionally voices.
The De-Compression setting converts the compressor to an upward expander that allows for the de-compressing of highly compressed audio signals, such as samples, keyboards sounds or previously recorded tracks that have been overcompressed. Each parameter function is inverted in De-Compression mode.
The Stereo Coupler function ensures that both channels produce the same degree of gain change, maintaining a coherent and stable stereo image.
Additionally, each channel incorporates a Noise Gate with ARC (Auto-Release-Circuitry). The Close-LED indicates when the Noise Gate shuts.
Both channels of the DynaMaxx are equipped with a 20-digit LED ladder meter displaying gain changes to a resolution of 1dB. The displayed values range from -10 to +9 dB. Each channel also has an additional Signal LED which illuminates when the input signal is hotter than -40 dB.
If it is required to patch in external processing equipment, both left and right channels are outfitted with sidechain inputs. If an acceptable sidechain signal is being received, an LED on the front illuminates.
The 9735 DynaMaxx processor is loaded with numerous forms of processing useful in many audio applications.
In the Box
SPL DynaMaxx Compressor / Limiter / Noise Gate
Limited 2-Year Warranty
Table of Contents
Inputs and Outputs
Instrumentation amplifier, electronically balanced (differential), transformerless
I/Os include both Left and Right XLR connectors and 1/4 inch TRS stereo jacks for balanced operation.
Nominal Input Level: +6 dB
Input Impedance: 22 kOhms
Output Impedance: < 600 Ohms
Max. Input Level: +24 dBu
Max. Output Level: +22.4 dBu
Minimum Load: 600 Ohms
Relay Hard-Bypass / Power Fail Safety