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<blockquote data-quote="Peter Morris" data-source="post: 141938" data-attributes="member: 652">Re: 60 Degree&nbsp; DIY Mid HiHi Mark,FWIW my 90 degree boxes and 60 degree boxes sound almost identical - the 60 degree version I think is slightly better.&nbsp;The latest results using FIR filters are absolutely stunning, everyone with out exception is amazed, and if I do say so myself .... I have not heard anything that sounds better :roll:A couple of questions - are you using 8 or 16 ohm 4594s ?&nbsp; and I assume you are using 8 ohm RCF 12&#039;s ?.With 16 ohm 4594 and 2 x 8 ohm 12&quot; RCF&#039;s (in parallel) the mids should be running about 3 to 4 dB less than the HF, for an 8 ohm 4594&nbsp; 6 to 7 dB less ...BUT it depends on the individual processor. The way the PEQs are determined is often different between manufactures .....a problem for any DIY project.The other issue is my 90 degree boxes are using RCFs and my 60 degree version B&amp;Cs&nbsp; ... so there is variation in the mid processing between the two boxes.Can you send me what you used and I will check it out.&nbsp; Also check out what Don is using. We all may need to come up with a few different alternatives for different processors etc. When I have a moment I will spend a little more time on some 60 degree IIR settings ... in the mean time I have some Lake LM26 settings that are fantastic; if anyone wants a copy I more than happy to send them on.</blockquote>

[QUOTE="Peter Morris, post: 141938, member: 652"] Re: 60 Degree DIY Mid Hi Hi Mark, FWIW my 90 degree boxes and 60 degree boxes sound almost identical - the 60 degree version I think is slightly better. The latest results using FIR filters are absolutely stunning, everyone with out exception is amazed, and if I do say so myself .... I have not heard anything that sounds better :roll: A couple of questions - are you using 8 or 16 ohm 4594s ? and I assume you are using 8 ohm RCF 12's ?. With 16 ohm 4594 and 2 x 8 ohm 12" RCF's (in parallel) the mids should be running about 3 to 4 dB less than the HF, for an 8 ohm 4594 6 to 7 dB less ...BUT it depends on the individual processor. The way the PEQs are determined is often different between manufactures .....a problem for any DIY project. The other issue is my 90 degree boxes are using RCFs and my 60 degree version B&Cs ... so there is variation in the mid processing between the two boxes. Can you send me what you used and I will check it out. Also check out what Don is using. We all may need to come up with a few different alternatives for different processors etc. When I have a moment I will spend a little more time on some 60 degree IIR settings ... in the mean time I have some Lake LM26 settings that are fantastic; if anyone wants a copy I more than happy to send them on. [/QUOTE]

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