DSPPA D6573 User manual

conference@dsppa.com /www.dsppacs.com The specifications will be subject to change without prior notice.
Copyright © Guangzhou DSPPA Audio Co.,Ltd All rights reserved.
D6573
Digital Feedback Suppressor
D6573 is a digital automatic feedback suppressor with high performance price ratio. The device allows
storage of 10 groups of data for needs of tone quality control in 10 different scenarios. During suppression
process the attenuation range may be as low as -48dB. When feedback is detected, the local device will
quickly and automatically analyze and lock the feedback frequency by using its advanced DSP algorithm and
determine the frequency point, frequency bandwidth and attenuation of the notching filter, and will save
the processing results. Since the device is able to control the frequency bandwidth of notching filter, only
feedback signal is filtered, without damages to the music signal and with very high acoustic fidelity. The
major features of the device include: Refined frequency search, adjustable suppression width, and display of
parameters.
24-bit A/D and D/A conversion, high resolution.
Each track allows automatic search for 12 frequency feedback, intelligent processing.
Prompt and easy default processing and complete feedback suppression performance.
In single-point mode, the device will automatically search for and lock notch frequency until the device
is manually reset or reconfigured.
In manual mode, the user can set all parameters of 2×12 filters, including their frequency and Q value,
etc.
Servo balanced input and output, gold plated XLR and TRS terminals.
Two modes (SING and AUTO) available on each filter.
Two parallel processing modules, the left and right channel may be adjusted independently or in
parallel.
24-bit high-performance DSP, ensuring signal resolution and dynamic range.
Soft start of switches, free of knocking sound, noise gating function.
Backlight 2×16 character LCD.
2×7 LED level display, capable of displaying input or output level.
High-quality SMD components and automatic SMD welding and online testing technologies ensure high
quality and reliability of the product.
Specialized internal power supply system.
Description
Features

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Copyright © Guangzhou DSPPA Audio Co.,Ltd All rights reserved.
Menu Functions:
(1) 2×7 LEDs respectively used for input/output level indication of left and right channels.
(2) "P:" Program selection menu, when selected, ":" changes to "->",the user can select any program set
Model
D6573
Number of Input Channel
2 channels, (2 XLR, 2 1/4" TRS)
Number of Output Channel
2 channels, (2 XLR, 2 1/4" TRS)
Input Impedance
Unbalanced 10kΩ/balanced 20kΩ
Output Impedance
150Ω
Maximum Input Level
10.5dBu
Maximum Output Level
10.5dBu
Sampling Frequency
48kHz
Gain
0dB(+4dB gear), 12dB(-10dBV gear)
Suppression Time
0.3s@1kHz
Audio Gain
9dB
Dynamic Range
106dB, A weighting
Frequency Response
20Hz-20kHz, ±0.5dB
CMRR
≥55dB(+4dBu gear), ≥75dB(-10dBV gear)
Crosstalk
≤97dB
Distortion+Noise
≤0.0025(@1kHz, +4dBu)
SNR
100dB, A weighting, refer to +4dBu
Power Supply
100V-240Vac 50/60Hz
Power Consumption
≤10W
Fuse
T1AL/250VAC
Machine Dimensions (L×W×H)
482×152×45(mm)
Package Dimensions (L×W×H)
515×245×75(mm)
Gross Weight
2.2kg
Net Weight
1.7kg
Specifications
Front / Rear Panel

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Copyright © Guangzhou DSPPA Audio Co.,Ltd All rights reserved.
from 0 to 9 by turning the encoder.
(3) "CH:" Left/right channel parameter adjustment activation menu, when "CH:L" is selected, adjustment to
left channel parameters is activated; when "CH:R" is selected, adjustment to right channel parameters
is activated; when "CH:LR" is selected, adjustment to parameters of both left and right channels is
activated.
(4) When "BYP" is shown, all feedback suppression filters of the current channel are bypassed. When "ACT"
is shown, the settings on the filter is valid and input signals are processed by the feedback suppression
filter.
(5) "FILT:", when prompt ":" changes to "->", the user can select any filter marked 1 to 12 by turning the
encoder.
(6) ":SING", when prompt ":" changes to "->", the user can press PUSH button to enter the display menu of
current filter and Q value. In SING mode, the user can adjust the frequency and Q value, while in
AUTO mode, the frequency and Q value will be simply displayed but can not be edited.
(7) If "SV" (indicator of parameter memory change) is shown, it means that the parameter has been
modified. After the user pressed the "STORE" button, "SV" changes to "SC", reminding the user
whether to remember the parameter, when the user presses the "STORE" button again, "SC"
disappears, which means that the new parameter has been recorded in the current channel.
(8) ": SET", when prompt ":" changes to "->", the user can press PUSH button to enter SING mode filter
setting menu: in the first step, the user should set up the quantity of SING filters and then press PUSH
button to choose if the SING filter parameters are to be reset. The user can press PUSH button again
to complete SING filter configuration.
Functional Keys and Encoder:
(1) PARAM/PUSH encoder with switches, allows adjustment to a large variety of parameters and the user
can enter the menu by press the PUSH button.
(2) FILTER SEL (Program/filter selecting button), the user may select up to 12 filters or 10 programs. When
"P->" is displayed, the user may select desired programs; when pressing this button once, "FILTER->" will
be displayed on the LCD, and at such time, the user may select desired filters. When pressing the button
once again, "P->" will be displayed and the user may select desired programs.
(3) FILTER MODE (Filter mode selecting button). When this button is pressed, the user can select the
operating mode of filter with the encoder. Two modes available: "SING" (single-point mode) and "AUTO"
(automatic mode). In addition, when the user presses down buttons FILTER MODE and FILTER SEL at the
same time, he/she can enter the auxiliary parameter configuration menu (NOISE GATE, HPF, LPF, Q, LED
DISPLAY, SENSITIVE).
(4) CHL, (5) CHR Left/right channel parameter adjustment activation button, which may be used to modify
parameters of the left and right channels. If the user wishes to modify parameters of both the left and
right channels, he/she should press buttons CHL and CHR at the same time. In addition, when the user
modifies any of the two channels and then switches to parallel mode, the parameters of one channel will

conference@dsppa.com /www.dsppacs.com The specifications will be subject to change without prior notice.
Copyright © Guangzhou DSPPA Audio Co.,Ltd All rights reserved.
be copied to the other, that is, if the user presses CHL button before he/she presses CHR button,
parameters of the left channel will be copied to the right channel.
(6) BYPASS may be used to bypass all feedback suppression filters.
(7) STORE button. The user may use the STORE button to save any modification to the preset value. Please
note that the user needs to press the button twice continuously to save the parameters before the saving
prompt disappears.
Rear Panel:
(1) INPUT LEVEL, input level adjusting knob. The device can be adapted to different working levels through
the toggle switch, and you can choose +4dBu or -10dBV.
(2) ANALOG INPUT. This product has XLR or TRS input jacks, and each group of XLR and TRS jacks is
connected in parallel, and can be used for balanced or unbalanced connections.
(3) ANALOG OUTPUT. This product has XLR or TRS output jack, and each group of XLR and TRS jacks is
connected in parallel, and can be used for balanced or unbalanced connections.
(4) Power socket. Before connecting the device to the power source, please make sure that the displayed
voltage corresponds to your local mains power supply. Please note that a fuse of proper type and rated
value should be installed in this device on the basis of the power supply voltage required by this device
(Please refer to section 4.1 "Specifications"). Please connect the device to the mains power supply with
the enclosed power cable.
(5) RS232 interface for firmware upgrade.
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