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TR 408D DIGITAL CROSSOVER  
     
4 inputs and 8 outputs coupled with an easy user interface, the TR 408D Digital Crossover/System Processor has all the audio processing tools needed for precise crossover and sound control. Each input allows gain and delay control,six parametric, low or high shelf filters. In addition to setting crossover frequencies, each output may be assigned to any one or a combination of inputs, allowing programing of four parametric, low or high shelf filters, delay for time delay adjustments, output gain, reverse polarity and a compressor/limiter for speaker protection.
 
DESCRIPTIVE DATA
Weight 10 lbs
Dimension (WxHxD) 19” x 1.75” x 6” - 1 U rack space
Input Active balanced, 18 kOhms
Max. input level +20 dBu
Output Active balanced, 100 Ohms
Max. output level +20dBu
Frequency response 20 Hz-20 kHz, ±0.25 dB
THD < 0.01% @1 kHz, +20 dBu
Dynamic range > 110 dB (20 Hz-20 kHz) unweighted
Output noise < -90 dBu unweighted

 

EQ FILTERS

 
Number 6 per Input, 4 per output

 

PARAMETRIC

 
Bandwidth 1/64th octave to 4 octave
Range +15/-30 dB, 0.1dB increments
Frequency resolution 1/24th octave

 

HIGH SHELF

 
Slope Selectable 6 or 12 dB/octave (1 high
  shelf, 2 high shelves)
Frequency range 19.7 Hz to 2 kHz
Range +/-15 dB, 0.1 dB increments

 

LOW SHELF

 
Slope Selectable 6 or 12 dB/octave (1 low
  shelf, 2 low shelves)
Frequency range 3.1886 kHz to 20.1587 kHz
Range +/-15 dB, 0.1 dB increments
 
CROSSOVER FILTERS
HIGH PASS FILTER  
Type Linkwitz-Riley, Bessel, Butterworth
Slope 12, 18, 24 and 48 dB/octave
Frequency range Off to 21.983.3 kHz, 245 step increments

 

LOW PASS FILTER

 
Type Linkwitz-Riley, Bessel, Butterworth
Slope 12, 18, 24 and 48 dB/octave
Frequency range Off to 21.983.3 kHz, 245 step increments

 

DELAY

 
Input maximum delay 682.5 ms
Output maximum delay 21.33 ms
Increment 20 µs

 

INPUT & OUTPUT GAIN

 
Range +12/-40 dB, 0.1 dB increments
Polarity 0 or 180 degrees (selectable in the
  output gain stage)

 

COMPRESSOR / LIMITER

 
Threshold -20 dBu to +20 dBu, 1 dB

 

INCREMENTS

 
Ratio 1.2 :1 to Infinity (1.2, 1.5, 2., 3, 4, 6, 10, 20,
  Infinite:1)
Attack 0.5 ms to 50 ms per dB
Release 10 ms to 1 sec. per dB
Range 20 Hz to 10.6 kHz

 

PROCESSOR

 
Input A/D 24 bit
Output D/A 24 bit
Processor 24 bit, 56 bit accumulator
Sample rate 48 kHz
Propagation delay 1.46 ms

 

OTHER

 
Power requirements 80–260VAC, 30W
I/O connectors XLR
Environmental

40–120 deg. F, non-condensing

 
Belisle Acoustics Inc. pursues an active Research & Development program and reserves the right to alter specifications without prior notice.
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