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<blockquote data-quote="Peter Morris" data-source="post: 138971" data-attributes="member: 652">Re: New DIY Mid HighIIR processing, 700Hz crossover - frequency and phase response.I will put the settings up as soon as I have a chance.PeterUPDATE ... added impulse, group delay and an unsmoothed frequency response @ 5 dB per div ...and ...Here is my first &quot;best&nbsp; guess&quot; at some IIR settings. They have been made on a Lake LM26 in IIR mode. Your DSP may define the BW or Q slightly differently. They are the settings used for the above plot and should be somewhere near the mark.&nbsp; They may need a little bit of adjustment to suit your taste.Also note that the Mid and HF have the same gain ... i.e. allowing for the impedance difference the LF is about 6 dB less sensitive than the HF.GAIN&nbsp; - DELAY - POLARITYVHF&nbsp; (16 ohm)&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; - 1.5 dB&nbsp; &nbsp; &nbsp;&nbsp; 1.62 ms delay +ve polarityHF&nbsp; &nbsp;&nbsp; (16 ohm)&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 0.0 dB&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 1.49 ms delay&nbsp; +ve polarityMID&nbsp;&nbsp; (2 x 8 ohm = 4 ohm)&nbsp; &nbsp; 0.0dB&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 0.00 ms delay&nbsp; +ve polarity VHF PEQ&nbsp;Freq&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 6K85BW Oct&nbsp; &nbsp; 0.55Gain&nbsp; dB&nbsp; &nbsp;&nbsp; +2.2Freq&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 9K62BW Oct&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 0.38Gain dB&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; - 3.5HF PEQ -&nbsp; &nbsp; Crossover 6K33 24dB LRFreq&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 890BW Oct&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 0.22Gain dB&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; -2.5Freq&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 1K15BW Oct&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 0.67Gain dB&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; -3.2Freq&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 2K1BW Oct&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 0.27Gain dB&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; -4.1Freq&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 2K88BW Oct&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 0.44Gain dB&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; -7.0Freq&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 6K98&nbsp; BW Oct&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 0.77&nbsp; &nbsp;&nbsp; Gain dB&nbsp; &nbsp; &nbsp; &nbsp; + 6.0 MID&nbsp; -&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; Crossover 700Hz 24dB LRFreq&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 144&nbsp;&nbsp; LF Shelving FilterBW Oct&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 2.42GaindB&nbsp; &nbsp; &nbsp;&nbsp; +4.5Freq&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 223BW Oct&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 0.33Gain dB&nbsp; &nbsp; &nbsp; &nbsp; -1.7Freq&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 376BW Oct&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 0.4Gain dB&nbsp; &nbsp; &nbsp; &nbsp; -7.0 Freq&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 394BW Oct&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 0.21Gain dB&nbsp; &nbsp; &nbsp; &nbsp; - 2.1Freq&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 564BW Oct&nbsp;&nbsp; 0.33Gain dB&nbsp; &nbsp; &nbsp; &nbsp; -2.4Q - Bandwidth converter<a href="https://soundforums.net/attachment.php?attachmentid=4371&amp;d=1343451453" target="_blank">https://soundforums.net/attachment.php?attachmentid=4371&amp;d=1343451453</a>I have include some Time / Amplitude / Magnitude plots.&nbsp; The last one is the FIR setting for comparison so you can see the difference compared to the IIR settings.</blockquote>

[QUOTE="Peter Morris, post: 138971, member: 652"] Re: New DIY Mid High IIR processing, 700Hz crossover - frequency and phase response. I will put the settings up as soon as I have a chance. Peter UPDATE ... added impulse, group delay and an unsmoothed frequency response @ 5 dB per div ...and ... Here is my first "best guess" at some IIR settings. They have been made on a Lake LM26 in IIR mode. Your DSP may define the BW or Q slightly differently. They are the settings used for the above plot and should be somewhere near the mark. They may need a little bit of adjustment to suit your taste. Also note that the Mid and HF have the same gain ... i.e. allowing for the impedance difference the LF is about 6 dB less sensitive than the HF. [B][FONT=Arial][COLOR=#000000]GAIN - DELAY - POLARITY [/COLOR][/FONT][/B] [FONT=Arial][COLOR=#000000]VHF (16 ohm) - 1.5 dB 1.62 ms delay +ve polarity[/COLOR][/FONT] [FONT=Arial][COLOR=#000000]HF (16 ohm) 0.0 dB 1.49 ms delay +ve polarity[/COLOR][/FONT] [FONT=Arial][COLOR=#000000]MID (2 x 8 ohm = 4 ohm) 0.0dB 0.00 ms delay +ve polarity [/COLOR][/FONT] [B][FONT=Arial][COLOR=#000000]VHF PEQ[/COLOR][/FONT][/B] [FONT=Arial][COLOR=#000000]Freq 6K85[/COLOR][/FONT] [FONT=Arial][COLOR=#000000]BW Oct 0.55[/COLOR][/FONT] [FONT=Arial][COLOR=#000000]Gain dB +2.2[/COLOR][/FONT] [FONT=Arial][COLOR=#000000]Freq 9K62[/COLOR][/FONT] [FONT=Arial][COLOR=#000000]BW Oct 0.38[/COLOR][/FONT] [FONT=Arial][COLOR=#000000]Gain dB - 3.5[/COLOR][/FONT] [B][FONT=Arial][COLOR=#000000]HF PEQ - Crossover 6K33 24dB LR[/COLOR][/FONT][/B] [FONT=Arial][COLOR=#000000]Freq 890[/COLOR][/FONT] [FONT=Arial][COLOR=#000000]BW Oct 0.22[/COLOR][/FONT] [FONT=Arial][COLOR=#000000]Gain dB -2.5[/COLOR][/FONT] [FONT=Arial][COLOR=#000000]Freq 1K15[/COLOR][/FONT] [FONT=Arial][COLOR=#000000]BW Oct 0.67[/COLOR][/FONT] [FONT=Arial][COLOR=#000000]Gain dB -3.2[/COLOR][/FONT] [FONT=Arial][COLOR=#000000]Freq 2K1[/COLOR][/FONT] [FONT=Arial][COLOR=#000000]BW Oct 0.27[/COLOR][/FONT] [FONT=Arial][COLOR=#000000]Gain dB -4.1[/COLOR][/FONT] [FONT=Arial][COLOR=#000000]Freq 2K88[/COLOR][/FONT] [FONT=Arial][COLOR=#000000]BW Oct 0.44[/COLOR][/FONT] [FONT=Arial][COLOR=#000000]Gain dB -7.0[/COLOR][/FONT] [FONT=Arial][COLOR=#000000]Freq 6K98 [/COLOR][/FONT] [FONT=Arial][COLOR=#000000]BW Oct 0.77 [/COLOR][/FONT] [FONT=Arial][COLOR=#000000]Gain dB + 6.0 [/COLOR][/FONT] [B][FONT=Arial][COLOR=#000000]MID - Crossover 700Hz 24dB LR[/COLOR][/FONT][/B] [FONT=Arial][COLOR=#000000]Freq 144 LF Shelving Filter[/COLOR][/FONT] [FONT=Arial][COLOR=#000000]BW Oct 2.42[/COLOR][/FONT] [FONT=Arial][COLOR=#000000]GaindB +4.5[/COLOR][/FONT] [FONT=Arial][COLOR=#000000]Freq 223[/COLOR][/FONT] [FONT=Arial][COLOR=#000000]BW Oct 0.33[/COLOR][/FONT] [FONT=Arial][COLOR=#000000]Gain dB -1.7[/COLOR][/FONT] [FONT=Arial][COLOR=#000000]Freq 376[/COLOR][/FONT] [FONT=Arial][COLOR=#000000]BW Oct 0.4[/COLOR][/FONT] [FONT=Arial][COLOR=#000000]Gain dB -7.0 [/COLOR][/FONT] [FONT=Arial][COLOR=#000000]Freq 394[/COLOR][/FONT] [FONT=Arial][COLOR=#000000]BW Oct 0.21[/COLOR][/FONT] [FONT=Arial][COLOR=#000000]Gain dB - 2.1[/COLOR][/FONT] [FONT=Arial][COLOR=#000000]Freq 564[/COLOR][/FONT] [FONT=Arial][COLOR=#000000]BW Oct 0.33[/COLOR][/FONT] [FONT=Arial][COLOR=#000000]Gain dB -2.4 Q - Bandwidth converter [URL]https://soundforums.net/attachment.php?attachmentid=4371&d=1343451453[/URL] I have include some Time / Amplitude / Magnitude plots. The last one is the FIR setting for comparison so you can see the difference compared to the IIR settings. [/COLOR][/FONT] [/QUOTE]

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