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<blockquote data-quote="Mark Wilkinson" data-source="post: 201757" data-attributes="member: 8989"><p><span style="color: #111111"><span style="font-family: 'Open Sans'"><span style="font-size: 14px">Hi Michael, for me this post hits the nuts of it....and that is, what's the easiest way to get it done right....</span></span></span></p><p><span style="color: #111111"><span style="font-family: 'Open Sans'"><span style="font-size: 14px">I gotta start by saying I'm totally sold on the driver-by-driver approach...</span></span></span></p><p></p><p><span style="color: #111111"><span style="font-family: 'Open Sans'"><span style="font-size: 14px">I understand that correcting driver by driver is a minimum phase effort. </span></span></span></p><p><span style="color: #111111"><span style="font-family: 'Open Sans'"><span style="font-size: 14px">But electrical x-overs filters aren't...(if i understand correctly).</span></span></span></p><p></p><p><span style="color: #111111"><span style="font-family: 'Open Sans'"><span style="font-size: 14px">I have experienced a huge amount of time consuming trial and error trying to find x-over filter types, orders, and points that gave the desired acoustic center.</span></span></span></p><p><span style="color: #111111"><span style="font-family: 'Open Sans'"><span style="font-size: 14px">Just for on-axis....move off and it's a whole new set of trial and error.</span></span></span></p><p><span style="color: #111111"><span style="font-family: 'Open Sans'"><span style="font-size: 14px">And IMHO, it's mostly due to sloped phase......</span></span></span></p><p></p><p><span style="color: #111111"><span style="font-family: 'Open Sans'"><span style="font-size: 14px">So for me, to get magnitude and phase flat driver-by-driver before I go to x-over, shortcuts all kind of time and effort....</span></span></span></p><p><span style="color: #111111"><span style="font-family: 'Open Sans'"><span style="font-size: 14px">If I can get mag and phase flat through, and maybe even past the critical region, simple symmetric LR works.....and then I can simply shift x-over freq for off-axis response, without any other redo.</span></span></span></p><p></p><p><span style="color: #111111"><span style="font-family: 'Open Sans'"><span style="font-size: 14px">And yes, I hear you re latency, and the temptation to over do mag and phase flattening too far out of band...(where it won't work anyway!)</span></span></span></p><p><span style="color: #111111"><span style="font-family: 'Open Sans'"><span style="font-size: 14px">I'm beginning tuning with all the taps I've got...</span></span></span></p><p>I can see from measurement when out-of-band isn't responding...that's the first place to let go of taps. </p><p><span style="color: #111111"><span style="font-family: 'Open Sans'"><span style="font-size: 14px">Then I just start chopping taps until I reach acceptable intersection of latency and SQ.</span></span></span></p><p><span style="color: #111111"><span style="font-family: 'Open Sans'"><span style="font-size: 14px">This has been much easier for me than </span></span></span><span style="color: #111111"><span style="font-family: 'Open Sans'"><span style="font-size: 14px">developing a good IIR crossover for on and off axis....something I have yet to accomplish...</span></span></span></p><p><span style="color: #111111"><span style="font-family: 'Open Sans'"><span style="font-size: 14px"></span></span></span></p><p><span style="color: #111111"><span style="font-family: 'Open Sans'"><span style="font-size: 14px">Here's a shot of the DIY60 using that approach. Latency is still high in the upper 20ms...but my tap axe is still swinging <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></span></span></span></p><p><span style="color: #111111"><span style="font-family: 'Open Sans'"><span style="font-size: 14px">Best and thx, Mark</span></span></span></p></blockquote><p></p>
[QUOTE="Mark Wilkinson, post: 201757, member: 8989"] [COLOR=#111111][FONT=Open Sans][SIZE=14px]Hi Michael, for me this post hits the nuts of it....and that is, what's the easiest way to get it done right.... I gotta start by saying I'm totally sold on the driver-by-driver approach...[/SIZE][/FONT][/COLOR] [COLOR=#111111][FONT=Open Sans][SIZE=14px]I understand that correcting driver by driver is a minimum phase effort. [/SIZE][/FONT][/COLOR] [COLOR=#111111][FONT=Open Sans][SIZE=14px]But electrical x-overs filters aren't...(if i understand correctly).[/SIZE][/FONT][/COLOR] [COLOR=#111111][FONT=Open Sans][SIZE=14px]I have experienced a huge amount of time consuming trial and error trying to find x-over filter types, orders, and points that gave the desired acoustic center.[/SIZE][/FONT][/COLOR] [COLOR=#111111][FONT=Open Sans][SIZE=14px]Just for on-axis....move off and it's a whole new set of trial and error.[/SIZE][/FONT][/COLOR] [COLOR=#111111][FONT=Open Sans][SIZE=14px]And IMHO, it's mostly due to sloped phase......[/SIZE][/FONT][/COLOR] [COLOR=#111111][FONT=Open Sans][SIZE=14px]So for me, to get magnitude and phase flat driver-by-driver before I go to x-over, shortcuts all kind of time and effort....[/SIZE][/FONT][/COLOR] [COLOR=#111111][FONT=Open Sans][SIZE=14px]If I can get mag and phase flat through, and maybe even past the critical region, simple symmetric LR works.....and then I can simply shift x-over freq for off-axis response, without any other redo.[/SIZE][/FONT][/COLOR] [COLOR=#111111][FONT=Open Sans][SIZE=14px]And yes, I hear you re latency, and the temptation to over do mag and phase flattening too far out of band...(where it won't work anyway!) I'm beginning tuning with all the taps I've got...[/SIZE][/FONT][/COLOR] I can see from measurement when out-of-band isn't responding...that's the first place to let go of taps. [COLOR=#111111][FONT=Open Sans][SIZE=14px]Then I just start chopping taps until I reach acceptable intersection of latency and SQ.[/SIZE][/FONT][/COLOR] [COLOR=#111111][FONT=Open Sans][SIZE=14px]This has been much easier for me than [/SIZE][/FONT][/COLOR][COLOR=#111111][FONT=Open Sans][SIZE=14px]developing a good IIR crossover for on and off axis....something I have yet to accomplish... Here's a shot of the DIY60 using that approach. Latency is still high in the upper 20ms...but my tap axe is still swinging :) Best and thx, Mark[/SIZE][/FONT][/COLOR] [/QUOTE]
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