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Foam Core Board Speaker Enclosures?
Foam Core Board Speaker Enclosures?
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Old 21st February 2018, 04:28 PM   #2931
xrk971 is offline xrk971  United States
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Foam Core Board Speaker Enclosures?
You should make the Trynergy - tractrix FAST synergy with TC9FD and some 6in woofers. It’s one of those best sounding speakers I have ever heard.
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Old 21st February 2018, 04:48 PM   #2932
Lingwendil is offline Lingwendil  United States
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Foam Core Board Speaker Enclosures?
Wow. Those are nuts. Do they require active EQ to work well? I don't have any sort of DSP and have been avoiding getting one, mainly due to analysis paralysis keeping me from choosing something that is affordable and works well.
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Old 21st February 2018, 04:53 PM   #2933
overtheairbroadcast is offline overtheairbroadcast  Canada
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YouTube

This guy's videos up in the link there and his "foam core basics".

I saw his videos and went from a cheap dollar store breakaway knife to digging out my old Xacto with a #2 blade (probably could just have gone with a stronger and wider OLFA, but I had the Xacto already). Makes a big difference and knowing how deep to and how to cut versus tearing away with a dull edge. Always sharp makes it easier.
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Old 21st February 2018, 05:47 PM   #2934
xrk971 is offline xrk971  United States
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Originally Posted by Lingwendil View Post
Wow. Those are nuts. Do they require active EQ to work well? I don't have any sort of DSP and have been avoiding getting one, mainly due to analysis paralysis keeping me from choosing something that is affordable and works well.
Get a $80 miniDSP and some cheap $5 Class D amps to use as active outputs from the miniDSP. It will seriously change your life and what you can do with speakers. I did that exclusively and it was easy to get superb results. I play with passive XO's now because I like to build amps and single amps need passive XO's.

You need the calibrated UMIK-1 too to make any use of your infinite tuning abilities. It's all menu driven point and click interface. Once uploaded to miniDSP, it holds the settings without PC connected.
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Old 21st February 2018, 11:28 PM   #2935
scott68 is offline scott68  United States
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I agree with XRK and would suggest that since you will be using a PC to setup the miniDSP, why not go all the way and use the free APO Equalizer with the free "Peace" interface. I have a small windows laptop and a tablet that I use to run this easy to use graphic and parametric EQ with low and high shelf's, 31 bands that you can adjust or change the frequency's Q, 7 channels, each with there own equalization, many filters: The list is endless. Did I mention that is free and in 15 minutes you can start using it.
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Old 21st February 2018, 11:33 PM   #2936
scott68 is offline scott68  United States
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Here are a couple of pictures
Attached Images
File Type: jpg APO EW with Peace.jpg (190.4 KB, 192 views)
File Type: jpg APO EW with Peace 2.jpg (71.2 KB, 191 views)
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Old 21st February 2018, 11:49 PM   #2937
xrk971 is offline xrk971  United States
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Those are great features to have but first thing is to get the speaker frequency response flat and phase flat and step response a triangle. Then all the other stuff can begin.
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Old 22nd February 2018, 02:10 AM   #2938
HammerSandwich is offline HammerSandwich
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Quote:
Originally Posted by xrk971 View Post
I play with passive XO's now because I like to build amps and single amps need passive XO's.
Or you could build even more amps.

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Originally Posted by xrk971 View Post
Those are great features to have but first thing is to get the speaker frequency response flat and phase flat and step response a triangle. Then all the other stuff can begin.
EQ APO can handle all of that, including running filters exported from REW & Rephase. For anyone with enough channels of reasonable-quality output, free software's an excellent to get your feet wet.
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Old 22nd February 2018, 02:19 AM   #2939
Lingwendil is offline Lingwendil  United States
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Foam Core Board Speaker Enclosures?
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Originally Posted by HammerSandwich View Post
Or you could build even more amps.
The idea of a whole rack of DIY tube amps just to run my future multi-way builds gives me a stiffy for sure, never a bad time to build up more amps of various sizes

I wanted to build up a five channel amplifier for home theater system fun anyway, might as well make a few stereoblocks in anticipation of multiple driver projects.

I'm not into class D stuff, but do have piles of LM4780, 3886, and some PCBs for them lying in a box somewhere.
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Old 22nd February 2018, 04:45 AM   #2940
xrk971 is offline xrk971  United States
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Use Class D to verify the miniDSP settings and XO design in software, if sounds and measures reasonably well, then invest in good Class AB or Class A amps to replace the $5 Class D. Even $5 TDA7498 can work well for proof of concept.
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