The New Design Digital Feedback Exterminator was Developed and Successfully Entered Mass Production

DF2 DIGITAL FEEDBACK DESTROYER

MODEL: DF2

FEATURES

96 KHz sampling frequency, 32-bit DSP processor, 24 bit A/D and D/A converter.

Control feedback automatically with the narrowband notch.

Each channel has independent 12 fixed filters and 12 dynamic filters,

can set the amount of fixed /dynamic filters via button “SYSTEM”.

48 LED feedback points LED indicator to show the current feedback points.

Set compressor, limiter and noise gate and other functions for each channel.

Providing 30 groups of device data storage to store the parameters of compression,

limiter and noise gate. The status of feedback compression before powering off can be saved.

Providing analog input & output or digital AES3, optional, coaxial input & output.

Working mode is switchable to bypass or suppress by button bypass/on.

Setting the password to lock all/part of functions via button “SYSTEM”

on front panel to against the unwanted changes to device working status.

All the parameters can be displayed by the LCD on front panel.

Resolution of LCD on front panel is 144*32. 6 bands of LED to show the level meter for output signal size accurately.

Freely edit the number of fixed and dynamic feedback points.

SPECIFICATION

MODEL	DF2
Input channel jacks	2 Analog XLR, 1 Digital XLR, Optical input
Output channel jacks	2 Analog XLR, 1 Digital XLR, Optical output
Input impedance	Balanced: 20KΩ
Output impedance	Balanced: 100Ω
CMRR	>70dB(1 KHz)
Input range	≤+25dBu
Frequency response	20Hz to 20KHz(-0.3dB)
S/N R	>110dB
THD	<0.01%OUTPUT=0dBu/1 KHz
Crosstalk of channels	>80dB(1KHz)
Feedback detect and reduction	Detect and eliminate feedback automatically by use of notch filters.
Singnal input frequency response	20Hz to 20kHz±0.5dB
Filters	24 Independent digital filters for each channel, 12 fixed filters and 12 dynamic filters
Min filter width	1/27th Octave
Max filter width	1/14th Octave
Resolution	0.5Hz
Time required to find/eliminate feedback	0.1-0.5s
FFT length	2048
Gain increased	6-10dB
Gain	0dB
Compress	Level: -40db~+20db rate: 1:1.0~1:20.0 response time: 10~200ms recovery time SOms~5000ms.
Limit	Level: -40db~+20db response time: 10-200ms recovery time: 50ms~5000ms
Noise gate	-120db ~-40db.A26
Display	Resolution of 144x32 character LCD and 6-segment LED display for accurate digital input and output level meter, mute and edit status
Processor	96KHz sampling rate, 32-bit DSP processor, 24 bit A/D and D/A converter
Power supply	AC110V-240V 50/60Hz
Power use	<15W
Unit mass	1U
Product dimension(WxDxH)	482 x 190 x 44mm
Net weight	3.6kg
Shipping dimension(WxDxH)	1PC:562×294×98mm/0.0160m³ 6PCS:576×308×612mm/0.1123m³
Gross weight	1PC:5.6(kg) 6PCS:33.6(kg)