9621 Expander / Gate / Ducker Module BROCHURE 661k
The 9621 has been DISCONTINUED and is shown for reference only.
  SHOWN APPROX LIFESIZE

The 9621 is an Expander / Gate / Ducker module which installs in one space of the Aphex Model 9000 rack or compatible dbx 900 series rack.

The Model 9621 Expander / Gate / Ducker Module represents the absolute latest technological advances in expander design. Like its predecessor, (Model 9611) the Model 9621 delivers true expansion, as well as a degree of user adjustability that permits unparalleled Gating and Ducking Action. However, a significant improvement in this model over its predecessor is the addition of Logic Assisted Gate™ circuitry. This newly developed patented control system combines sophisticated level detection with logic generated control voltage, assuring positive, stable, and accurate triggering, irrespective of attack time.

The Model 9621also features switchable Parametric Key input filters that permit user shaping of the keying signal through selectable frequency and variable bandwidth controls. A convenient front panel headphone jack has been added to allow monitoring of the Key Input without disruption of the audio output.

Best of all, the Model 9621 continues in the Aphex tradition of providing transparent performance to achieve the highest possible sound quality of your system. Employing the Aphex 1001 VCA guarantees significantly lower distortion than any other VCA, while delivering superb transient response, stability, and low noise.
FEATURES and BENEFITS
For Aphex Modular System Model 9000 Series Rack or compatible dbx 900 Series rack
Logic Assisted Gate Circuitry - Proprietary control circuitry eliminates potential noise (chattering or clicking) irrespective of Attack speed
Front Panel Accessible Key Monitor Headphone Jack - Allows monitoring of the key signal without disruption of the audio output
Parametric Key Input Filters - A semi-parametric filter section allows greater Key Input application flexibility by making it possible to select and adjust both center frequency (from 30Hz to 12kHz) and bandwidth (1.7 to 9 octaves) at a slope rate of 24 db/octave
"Straight Wire" Sound Quality - Highest grade componentry and intelligent circuit design assure highest possible audio quality with absolutely no degradation of the signal source.
Instantaneous attack (10usec) - follows any input waveform with no loss of leading edge
Slaving option - allows one Model 9621 to be controlled by another as a slave unit
External Key Input
Unparalleled distortion specifications - <0.002% typical
100 dB of Attenuation Range
Excellent Circuit Stability - assures accurate settings by preventing "wandering"
Electronically Servo-Balanced Inputs and Outputs
Employs the proven Aphex VCA1001
APPLICATIONS
Controlling microphone leakage in the recording studio and in 'Live' Sourd Reinforcement applications
Adding dynamics to existing program material and dull recordings
"Ducking" programs for voice overs and automatic level changes (paging, Conference room mic precedence, etc.)
Reshaping sampled sound envelopes
Creating special dynamic effects
  Specifications - Aphex Model 9621 Expander / Gate / Ducker Module
NOMINAL OPERATING LEVEL:
user selectable on PCB		 +4dBu -10 dBV
INPUT  
  Type Transformerless, differential servo balanced with passive 4th order RF filter
  Impedance 22k balanced, 11k unbalanced same
  Nominal Level +4 dBu -10 dBV (-7.8 dBu)
  Maximum Input Level +25 dBu +10.8 dBv (+13 dBu)
  CMRR >90dB/100Hz, >70dB/1kHz, >50dB/20kHz same
SIDECHAIN
  Gain Reduction Element Aphex VCA 1001
  Key Input Impedance 50k ohms, unbalanced
  Key Output Impedance 150 ohms unbalanced
  Maximum Key Level +21dBu
OUTPUT    
  Type Transformerless, RF filtered, differential servo balanced
  Impedance 65 ohms balanced/unbalanced same
  Maximum Output Level: balanced +27 dBu +13 dBv (+15.2 dBu)
  unbalanced        +21 dBu +7 dBv (+11.2 dBu)
  Dynamic Range 121dB 112dB
  Bandwidth ±0.65 dB 5Hz to 65 kHz same
  Hum & Noise @ unity Gain -87dBu -94dBu
  Hum & Noise, fully off -94dBu -97dBu
  Crosstalk @ 20kHz -96dBu same
  THD @ +27dBu 0.009% same
  THD @ +4dBu 0.003% same
  IMD (SMPTE) @ +27dBu 0.007% same
  Key Listen Nominal Level (+4dBu in) +8dBm (6.3 mW into 600 ohms headphones) n/a
  Key Listen Impedance 49.9 ohms n/a
CONTROLS
Threshold -50dBu to +20dBu
Attack Time 10uS to 100uS
Hold 10uS to 100uS
Release 40uS to 4 Seconds
Ratio 1.2:1 to 10:1
Range 0 to 100dB
Frequency 30Hz to 12kHz
Bandwidth 1.7 to 9.2 octaves with 24dB per octave slopes
FUNCTION SWITCHES  
  Filter In / Out, External Key, Duck, Expand, In / Out (Out is bypass)
Key Listen, Master / Slave link
OTHER SPECIFICATIONS
  Audio, Control, Power Terminations PCB edge connectors with 15 gold contacts (mates w/female connector in the 9000R)
  Power Requirements ±15VDC at 140mA (maximum)
  Dimensions:    Front Panel: 5.25" H x 1.5" W
  Circuit Board:            4.5" H x 9.5" D (10.65" D including front panel & knobs)
  Net Weight <1 lb
  Shipping Weight 2 lbs
REQUIRED HARDWARE (purchased separately)
  Module Frame 9000R Modular System required per 11 modules (3RU)
  Power Supply 9000PS for module combinations not to exceed 3 amps load
9001PS same as 9000PS with dbx 900 Series module capability
9005PS for module combinations not to exceed 5 amps load (3RU)
DOWNLOADS   2 p. BROCHURE 661k  
     
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2/22/10