DPA480 Speaker Management System/Digital Sound Processor/Digital Crossover/Digital Audio Processor/Digital Controller

Speaker Management System/Sound Processor 1.Hp/Lp 48dB/oct,Full Pass,band pass,notch filter 2.Compressor+peak limiter+TCP/IP

4 In and 8 Out Speaker Managemnt Processor Description

The DPA480: it is a 4 input x 8 output Speaker Processor.

The processor's activity of the 4 inputs is displayed by rows of 6 level leds + 1 clip led.

The processor's activity of the 8 outputs is displayedby rows of 5 level leds + 1clip led + 1 Limiter led.

Theprocessor has 4 analog inputs, 2 stereo digital input, and 8 analog outputs. Each input and each output has 7 parametric filters.

All the input and output filters can be selected to be Bell, 1st/2nd Ord Shelvingswith -3dB at cutting Freq.,Symmetrical Shelving with variable Q, Hp/Lp with variable Q,1st/2nd Ord. All Pass(90/180Deg. Phase rotation at the cutting freq.), bandpass and notch. The outputs X-Over section has Butterworth,Lin/Reyl and Bessel filters up to 48dB/Oct or Custom selectable Hp/Lp with up to 48dB/Oct with the cascaded Iind Ord cells adjustable in Freq and Q. RMS compressor with selectable Ratio up to 32:1 and adjustable Soft/Hard Knee.

Output Peak Limiter with THR in Vp or dBu for the Loudspeakers protection. The RMS compressor and Peak Limiter'sTHR can range up to -30dBu. Each input and output channels have delays up to 850ms, with steps of 22usec.Linking functions between inputs and linking functions between outputs are available. A function is allowing to have ramps closing the output level on parameter changes, when the unit is used as installation unit; this function can be excluded when the unit is used live and it is necessary to perform small changes to the set parameter...on the fly.

The sound processor DPA480 is providing a very powerful Matrix allowing to assign to each output the desired percentage of anyone of the availabel 4 inputs. To Each input can be assigned the Analog one, Digital or a Pink/White noise generated by the DPA480 itself and useful for the Loudspeakers tuning/setting during the installations.

 The speaker Management Processor's Pc SW for the remote control is allowing to connect in net up to 32 units and is allowing to show the phase of the filter setting and to adjust graphically the RMS compressor and the Peak limiter. A Flash card is available on the DPA480 for storing and recalling presetsThe remote control Sw can work through a local USB interface, a RS485 or a TCP/IP net interfaces.  

The Processor DPA-480  4x8 Speaker Management System is based on a powerful DSPplatform having the following specifications :

1. Inputs:      XLR balanced

2. Outputs:   XLR balanced

3. Minimum Load: 150ohm

4. Device memories: 8 User memories:    8

5. Recall memories:  8      Device memories: 8

6. VU metering:   7 led for Inputs [-20dBu up to +15dBu; Clip]

                              7 led for Outputs [-15dBu up to +15dBu; Clip; Limit]

                              Output Leds can be used for displaying the Output  level OR the Limiter activity

7. THD+N:  0.001% at 1kHz 0dBu

8. S/N: >112dBA 

9. Frequency Response: 20Hz–20kHz ; -0.5dBu at 20Hz and 20kHz

10. Spdif input gain(Digital): 0dBu on RCA connector

12. Process Resolution: Dream SAM3716 DSP, 24x32 bit for filtering process;

                                             96 bits resolution on intermediate computation results

13. Converters:   2 x A K 5392,24 bit A/D; 2xAK4396, 24bit D/A

14. Display:  Graphic 2x20 characters

15. Size:  19”x(1U)

Sound Processor--DPA480 Features

1. Maximum Delay: 848.998ms by 21us increment/decrement steps

2. Parametric Equalization: 5 filters on each input assignable as Bell or Shelving

                                                  7 filters on each output assignable as Bell or Shelving

3. Filters:  Symmetrical Bell or High/Low Shelving up to second order

4. Filter gain: for Bell and Shelving the gain is ranging from -15dBu up to +15dBu by 0.5dBu resolution steps

5. Centre frequency: selectable with a 1/24th of octave resolution steps from 20Hz up to 20kHz

6. Filter Q/BW: Q/BW from 0.3/4.8 up to 20/0.009 by 0.1 resolution steps (Q)

7. Each Filter of the Eq can be singularly “Bypassed” once set.

8. HPF: from 1 st order(Butterworth -6dB/Oct) up to 4th Order 

              (Butterworth, Linkwitz or Bessel -48dB/oct)

9. LPF: from 1 st order(Butterworth -6dB/Oct) up to 4th Order

             (Butterworth, Linkwitz or Bessel -48dB/oct)

 10. Filter's Freq. resolution: 1/24th of octave

RMS Compressor

1. Threshold:  from 20dBu up to -10dBu

2. Attack time: Attack time from 5ms up to 200mS (1ms resolution up to 20ms, then 10ms resolution up to  100ms and 20ms  resolution up to200ms)

3. Release time: Release time from 0.1 sec up to 3 sec (0.1sec resolution )

4. Ratio: from 1:1 (not active) up to 32:1 (Limiting)

5. Knee: Soft or Hard

6. PEAK Limiter

7. Threshold: from 20dBu up to -10dBu

8. Attack time: A ttack time from 5ms up to 200ms (1ms resolution up to 200ms,then 10ms resolution up to 100ms and 20ms res. up to 200ms )

9. Release time: Release time from 0.1 sec up to 3 sec(0.1 sec resolution)

DPA-480 Remote Control

The Processor's Back Pannel

DPA480 Speaker Management System/Digital Sound Processor/Digital Crossover/Digital Audio Processor/Digital Controller