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2-way digital plate amplifier with DSP+GUI

  • Model No.:DSP-2304MF
  • Made in:Taiwan, ROC
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Key Features

Introduction


DSP-2304MF is 300W 2way digital power amplifier. It is for active Public address (PA) bi-amplifier system. Due to digital amplifier, switching power supply and with DSP function design, it’s high efficiency, high stability & lighter weight compared to traditional analog amplifier & liner transformer design.

C.  Features:

1. Digital amplifier with high current output device.
2. two channels female combo input.
3. two channels male XLR output.
4. one channel male XLR mixer output.
5. two channels RCA input.
6. USB port link to PC.
7. signal indicator (LED).
8. limit indicator (LED).
9. power on & standby indicator (LED).
10. low frequency mode selector(LF): EXT.SUB/FLAT/DEEP bass
11. high frequency mode selector(HF): +3dB/FLAT/-3dB
12. MIC/LINE B GAIN setting: 0db / 12dB / 24dB / 36dB
13. channel A attenuator
14. channel B attenuator
15. power switch
16. AC Inlet /AC link out
17. Output short / thermal / DC offset protect circuit.
18. On board digital signal processing includes crossovers, slope, PEQs(frequency 
point, Gain, Q value), delay time setting, output limit setting. 
19. Easy Graphic User Interface (GUI) Control for DSP parameter adjustment and
preset saved/load through USB

 

D.  Specification

1. Output power …………………………………… for woofer: 200Wrms /8ohm @ 1% THD
for tweeter: 100Wrms/8ohm @ 1% THD
2. S/N Ratio @ rated power ………………………………… > 95 dB @ A-WEI
3. THD @ A-WEI ……………………………………………………… < 0.05%
4. Input sensitivity ………………………………………………… @ 0.7v/1KHz
5. Input Impedance ………………………………………………… 22KΩ
6. Dimension …………………………………………………………… 350(L) x 158(W) x 60(H) mm
7. Package………………………………………………………………… 10pcs/CTN

E.  DSP processing (24-bit, 48kHz, 2in-2out)

1. block diagram

 
2. processing block
A. input volume control : with slew and mute control
B. HPF, LPF:
1) cutoff frequency : 20~20kHz
2) Slope type: Butterworth -12,24dB/oct  
Bessel -12,24dB/oct
Linkwitz-Riley-12,24 dB/oct
C. 10-Band PEQ:
1) frequency : 20~20kHz
2) Gain:  +/- 12dB
3) Q: 0.1~17.3
D. Delay: 12.5ms max per channel
E. Limiter:
1) threshold : 0dB ~ -12dB
2) Time constant: 50~500 dB/sec
F. Bridge:
1) ch1 bridged
2) ch2 bridged
3) ch1+ch2(mix) bridged

F.  Software GUI control

 

1. GUI function:
1) Full Control of the DSP
2) Graphic Frequency Response Display(PEQ and HPF ,LPF)
3) Link Function: for linking the parameters of ch1&ch2
4) Preset SAVE/LOAD

2. function descriptions:
1)  Filter & PEQ Frequency Response:
 
Graphically display the XOVER(HPF,LPF) & 10 band PEQ frequency Response ,user can drug the PEQ frequency band directly from the graphic to adjust the Gain & frequency . TW means the Tweeter Frequency response and WF means Woofer Frequency response

2)  Level Meter and A,B channel muting:
 
Meter detection is on when the “Meter” button is pressed, and there’s a clip indicator when the input is overload. Mute the input by checking the Mute A and Mute B.
3)  XOVER:
 
Adjust the cross over frequency by applying the HPF or LPF filter
There are different slope type available:
Butterworth -12dB/oct
Butterworth -24dB/oct
Bessel -12dB/oct
Bessel -24dB/oct
Linkwitz-Riley -12dB/oct
Linkwitz-Riley -24dB/oct
The Frequency Range is 20Hz-20kHz with 1Hz step

4)  PEQ:
 
10 Band of Parametric Equalizer is available for adjustment, 
“Bypass all “check box will bypass all the EQs by checking it. 
By press each tab button to adjust each EQ’s parameter, the present adjustment will show in red.
Frequency Range: 20Hz-20kHz , Gain Range: -12dB~ +12dB, Q range: 0.1~16
If the EQ is active, the number in the tab button will show in green, if not , it will show in black.

5)  Delay:
 
Adjust the time Delay of each channel
Delay time Range: 0~10ms with 0.1ms step

6)  Limiter:
 
Apply output limiter to limit the output power to protect the speaker, when the threshold is in 0dB means the output power will not exceed maximum RMS power.

7)  Output Level:
 
Control the output volume of the amp

8)  System Function:
 
USB indicator shows the USB status ,if the indicator is on means the USB connection is ready
“Read Device” : read all the parameter from device
“Save” : save all present parameters to file 
“Load”: load all the parameters from file