The 2.5 clone papers - CCRMA
The 2.5 clone papers - CCRMA
The 2.5 clone papers - CCRMA
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Frequency response of series filter #2, no RC circuit:<br />
100.0<br />
dBSPL<br />
TGAudio MLS - Frequency Response 08-12-02 00.12.29<br />
90.0 36.0<br />
80.0 -36.0<br />
70.0 -108.0<br />
60.0 -180.0<br />
50.0 -252.0<br />
200 1k 10k Hz 20k<br />
File: series v2.mls<br />
CH A dBSPL 1/3 Octave 51.2kHz 16K Rectangular Start 2.71ms Stop 5.57ms FreqLO 350.68Hz<br />
red= v2 blue=min phase<br />
Fig.27. Series filter #2, no RC. Red= freq.resp., blue=min.phase.<br />
<strong>The</strong> serious dip in response at 2.3 kHz has been reduced slightly, but this is far from being an acceptable frequency<br />
response. And still there are serious phase problems.<br />
Impact of RC circuit on system response, series filter v.2:<br />
100.0<br />
dBSPL<br />
TGAudio MLS - Frequency Response 07-12-02 23.54.16<br />
90.0 36.0<br />
80.0 -36.0<br />
70.0 -108.0<br />
60.0 -180.0<br />
50.0 -252.0<br />
200 1k 10k Hz 20k<br />
CH A dBSPL 1/3 Octave 51.2kHz 16K Rectangular Start 2.68ms Stop 5.57ms FreqLO 345.95Hz<br />
File: plus-minus-RC.mls<br />
inverted polarity red=tweeter hight, no RC blue=tweeter hight, +RC<br />
Fig 28, System response, series filter #2, with/without RC circuit. Blue = with RC.<br />
<strong>The</strong> system response is generally lowered by 2 dB.<br />
<strong>The</strong> system response of the <strong>2.5</strong> <strong>clone</strong> is around 83 dB/2.83 V/1meter, which is pretty low. No reason to burn more<br />
energy in the RC circuit.<br />
CLIO<br />
CLIO<br />
108.0<br />
Deg<br />
108.0<br />
Deg<br />
14
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