DPA-880T Audio conference system

The DPA880T is a 8 input x 8 output Matrix for Conference Systems, fully remotely controlled via USB connection (Pc Sw remote control) or RS485 (Pc Sw remote control for net configuration, or Wall Panel remote control), allowing the complete routing of 8 line or microphone inputs to 8 line outputs.

For the microphone inputs, can be selected a Phantom power Supply. The DPA880 Speaker Management Processor on the front panel offer the possibility to select up to 6 presets, edited and uploaded on the unit through the Pc Sw, thanks to 6 push buttons.

The Name of the current preset is displayed on a wide 2x24charachters LCD and the main activities of the unit's channels are shown by 8 rows of 5 leds: Line, Microphone, Feedback, Signal/Clip, Limiter. Anyone of the 6 available presets can even be recalled by a remote Wall Panel Control, allowing also the control of the Master Output Volume.

The Wall Remote Control, acting through a RS485 connection, and the Remote PC control, via USB, can operate simultaneously.When not used for the Wall Panel Remote Control, the RS485 connection can be used for the creation of a

DPA880T speaker managemnt network of up to 32 units, all controlled by the Ps Sw remote control.

The DPA880T speaker management is a powerful Matrix, allowing to select as input, for any of the 8 input independently, a Line Level Input or a Microphone Input, where for the microphone input there is the possibility to provide a 48V Phantom Power supply.

When selected a microphone Input, the unit provide the possibility to activate a Feedback Eliminator based on a powerful “pitch shifting”algorithm, particularly effective for voice applications.Each output has as first stage an 8x8 Matrix allowing the mix of the 8 inputs and processing the final mix with a 5 bands Eq, with filters assignable as Peaker or Hi/Low Shelving, able to range from -15dB up to +15dB gain; following the 5bands Eq, a Hp and a LP filters up to 24dB/Oct shape the output channel band's limits; a delay is also available for signal/speakers alignments.

The Dynamic process of each output channel is left to a powerful RMS Compressor, with variable Ratio and to a final Peak Limiter for the complete output peak control. Master Input Gain and Master output Level controls are available for the
simultaneous level control of the all inputs and outputs; four Switches, Sw controlled, are available for the On/Off control of remote devices.

DPA880T Audio conference system

Technical Specifications :

The DPA880 8x8 Conference System Matrix is based on a powerful DSP platform having the following specifications

Input/Output Stages

1. Maximum Input Level: Line :+18 dBu / MIC:-11dBu

2. Maximum Output Level Low: +18 dBu

3. DSP Processing :

4. Digital Processing (DSP): Dream SAM3716, 24bit (data) x 96 bit

(coeff.),Sw Enhanced Precision

5. Sampling Frequency: 48kHz

6. Converters : 4xAK5385B, 24 bit A/D; 1xAK4358, 24bit D/A

General Data

1. S/N: >104dBA

2. THD+N: 0.005%

3. Frequency Response (Bypass): 20Hz-20kHz (+- 1 dB)

4. Input Channels: 8, balanced

5. Output Channels: 8, balanced

6. Display: Graphic, 2x24 characters

7. Power Supply: 110-220V

8. Remote Control: RS485, USB

9. Size: 19” (1xRU)

DPA880T Speaker management/Conference System Features

1. Maximum Delay: 380.998ms by 21us increment/decrement step, on each Output Parametric Equalization: 5 filters on each input assignable as Bell or Shelving Filters: Symmetrical Bell or High/Low Shelving up to second order Filter gain: for Bell and Shelving the gain is ranging from -15dBu upto +15dBu by 0.5dBu resolution steps

2. Center frequency: selectable with a 1/24th of octave resolution steps from20Hz up to 20kHz

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

4. HPF: from 1st order (Butterworth -6dB/Oct) up to 4th Order (Butterworth, Linkwitz or Bessel -24dB/Oct)

5. LPF: from 1st order (Butterworth -6dB/Oct) up to 4th Order (Butterworth, Linkwitz or Bessel -24dB/Oct)

6. Filter's Cutting Frequency steps: 1/24th of octave RMS Compressor

7. Threshold: from 18dBu up to -12dBu

8. Attack time: Attack time from 5ms up to 200ms (1ms resolution up to 20ms, 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 (0.1sec resolution)

10. Ratio: 1:1 (Bypass) up to 32:1 (Limiting), with Ratio Slope computed on Log Table with 0.1dB steps precision

11. Knee: Soft/Hard

Peak Limiter
12. Threshold: from 18dBu up to -12dBu

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

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

15. VU metering: 1 led for Microphone Phantom Power Supply Active5 led for Outputs Activities:Line - Line input Selected Mic - 16. Microphone input Selected Feedback - Feedback Active (available ONLY if selected Mic Input)

17. Sign/Clip -Turning on Blue when present Signal on the channel and turning Red when the signal is clipping Limit- Showing the RMS Compressor or the Peak Limiter activity

DPA880T Speaker management/Conference System Remote Control(fig1)

DPA880T Speaker management/Conference System Remote Control(fig2)

DPA880T Conference System Back Pannel

DPA880T Conference System Remote Controller

Marani Brand--Company View

Marani Brand--Factory View

Marani Brand---CEO Image