APHEX Compellor 320D Stereo Audio Level Controller
Transparent audio level control for broadcast, recording and live sound.
Balanced analog Input/Output • AES digital Input/Output • Dual mono or stereo operation
Transparent Audio Level Control for Broadcast, Recording and Live Sound
The patented technologies within the 320D are totally unique. By going beyond conventional design ideas, the 320D provides audio processing with unprecedented sound transparency, yet is exceedingly effective at controlling levels. No other product can match the performance of the 320D. Algorithms like our “DVG”, “DRC”, and “FDL” have yet to find any rivals.
The 320D’s Frequency Discriminate Leveler section, with the Dynamic Verification Gate and the Silence Gate, slowly adjusts the volume level of an audio stream with very complex algorithms that hide its work. It works differently at different frequencies and stops processing when the sound stops then resumes instantly when the sound reappears so there is no distracting increases in program background noise. When you listen, you know the levels are made more even, but you don’t perceive the levels are shifting.
The 320D’s Variable Slope Compressor, Dynamic Recovery Computer and Dynamic Verification Gate add adaptable compression to match the texture of changing audio sources. You don’t hear pumping or other audio artifacts, just natural sound that is evenly consistent in loudness.
The 320D’s limiter acts on peaks that shoot beyond average program levels so they are easy to handle by any analog or digital recording system.
The 320D can act as two independent mono processors or one linked stereo processor by front panel selection. This is true with both analog and digital I/O.
When the analog input is used, the digital output contains the 320D’s processing. When the digital input is used, the analog output contains the 320D’s processing, properly leveled.
Aphex builds products that last and last without need for repairs or calibration. Some Compellors have literally been in 24 hour use in the same rack for a decade, or longer! When you specify a Compellor, you know it will do its job flawlessly and give you peace of mind.
Applications
Broadcast pre-processing
MP3 Encoding and playback
Recording
Installed and Mobile sound
DAW input
Mastering
Satellite uplinks
Background Music
Ham Radio
Tape Duplication
Cable TV
SPECS:
NOMINAL OPERATING LEVEL:user selectable on back +4dBu -10dBV>
ANALOG INPUTS
Connector 3 pin XLR Female
Type Transformerless servo balanced RFI filtered
Impedance 22k ohms balanced, 11k ohms unbalanced
Operating Level user selectable +4dBu or -10dBv
Max input level +27dBu (ref = +8); +25dBu (ref = +4 +10dBV (ref = -10)
CMRR >90dB at 100Hz >70dB at 1kHz >50dB at 20kHz
DIGITAL INPUTS
Connector 3 pin XLR female
Type Transformer balanced
Impedance 110 ohms
ANALOG OUTPUTS
Connector 3 pin XLR Male
Type electronic servo balanced (unbalanced without 6dB loss)
Impedance 65 ohms bal or unbal (nominal load 600 ohms or greater)
Max level out (bal) +25dBu (ref = +4) +10.8dBV (ref = -10)
Max level out (unbal) +20dBu (ref = +4) +10.8dBV (ref = -10)
DIGITAL OUTS
Connector 3 pin XLR Male
Type Transformer balanced
Impedance 110 ohms
AUDIO
Frequency Response ±1dB 10Hz to 65kHz
Hum and noise (1k tone at unity gain)
No gain reduction -67 dBu (ref = +4) -86dBV (ref = -10)>
10dB gain reduction -74 dBu (ref = +4) -89dBV (ref = -10)>
Crosstalk at 20kHz -65 dBu (ref = +4) -78dBV (ref = -10)>
Dynamic THD typically .05% for 1kHz at 20dB gain reduction
Static THD .025% at maximum output level
IMD, max output .13% (ref = +4) .4% (ref = -10)>
SYSTEM FUNCTIONS
Compression
Frequency Discriminate Leveling
Peak Limiter
Dynamic Verification Gate (DVG)
Dynamic Recovery Computer (DRC)
Silence Gate
Stereo Enhance
THRESHOLD
Compressor 30dB below nominal level
Leveler 30dB below nominal level
Limiter 14dB above nominal level
RATIO
Compressor 1.1:1 to 3:1 program dependent
Leveler 20:1
Limiter >30:1
ATTACK TIMES
Compressor 5 to 50msec program dependent
Leveler fast 20Hz = 1.5 Sec >1kHz Frequency Discriminate Leveler
Leveler slow 20Hz = 5 Sec >1kHz Frequency Discriminate Leveler
Limiter 1 uSec
RELEASE TIMES
Compressor 200mSec to 1 Second program dependent
Leveler fast 3 sec
Leveler slow 10 sec
Limiter 200 msec
DIGITAL AUDIO
Input SR Locks to 32, 44.1,48, 88.2, 96kHz ±3%
I/O Type AES/EBU 110 ohms XLR
Default Output SR User definable by replacing crystal; 48kHz standard
Word Clock Not Supported
OTHER SPECIFICATIONS
Power Requirements 100 – 120 – 220 – 240 VAC, 50-60Hz 20 Watts
Dimensions 1.75″H x 19″W x 10.125″ D (44.5mm x 482.6mm x 257mm) (allow for wire dress)
Net Weight 8 lbs(3.6 kg)