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JL Audio Ahead of the Curve

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  #11  
Old 08-20-2016, 11:24 PM
nicoff nicoff is offline
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Originally Posted by aqman View Post
How are you guys achieving the time alignment in your two channel systems? There doesn't seem to be many 2 channel DAC/pre that allow delaying of the mains.
I used Barry Ober's method. He wrote a white paper and shared it for free on his website. He also does house calls...
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  #12  
Old 08-21-2016, 12:41 AM
aqman aqman is offline
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Originally Posted by nicoff View Post
I used Barry Ober's method. He wrote a white paper and shared it for free on his website. He also does house calls...
I also have his CD and I read the white papers. A must have for anyone with a sub. I used the method to integrate a f110 in my home theater setup. It really works. But there I could use AV pre/pro to set distance to mains to be >10 ft than the sub distance to compensate for group delay in the sub.

If you are one cycle behind at e.g. 80 hz then you are not time correct or even phase correct at any frequency other than the crossover frequency.

My understanding is that the magic comes from being time correct. I'd like to know how people with 2 channel systems are accomplishing this. If you sit 15' from your speakers you could just move sub closer, but this is not possible for many (most) of us.
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  #13  
Old 08-22-2016, 02:09 PM
trponhunter trponhunter is offline
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Here's how to truly time align for a 2 channel system
https://www.trinnov.com/products/hi-...st/?lang=en_us
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  #14  
Old 08-22-2017, 10:15 PM
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The most optimal solution is to get 4 subs, one in each corner of the room. Even if you get slightly smaller and less expensive subs, you get far better room balance with it!
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  #15  
Old 08-23-2017, 01:24 AM
2fastdriving 2fastdriving is offline
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The most optimal solution is to get 4 subs, one in each corner of the room. Even if you get slightly smaller and less expensive subs, you get far better room balance with it!
The most optimal solution in my opinion is to get full range speakers and ditch the subs. Where possible, ymmv, etc.
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  #16  
Old 08-23-2017, 01:25 AM
2fastdriving 2fastdriving is offline
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Ah... Op does say that he will use for movies. That makes sense
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  #17  
Old 08-23-2017, 02:30 AM
bigblue bigblue is offline
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The most optimal solution in my opinion is to get full range speakers and ditch the subs. Where possible, ymmv, etc.
That is also my experience.
I had a plan to hook up my 2 Velodyne DD10 to my Amati Futura to get more timbre in the lowest bass. But that was before I got my Gryphon amp...
My "test" CD in this case is Boz Scaggs - Dig. The last song "Thanks to you" has some very low bass notes. And if you can get parts of you body to vibrate - without the whole room exaggerating the sound - then you can check that box. IMO.

Last edited by bigblue; 08-23-2017 at 02:38 AM.
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  #18  
Old 09-01-2017, 02:26 PM
sssb6 sssb6 is offline
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Quote:
Originally Posted by docmd2010 View Post
The most optimal solution is to get 4 subs, one in each corner of the room. Even if you get slightly smaller and less expensive subs, you get far better room balance with it!
It really depends on the room dimensions and listening spot. Careful placement of subs to attenuate peaks and smooth out valleys is the best way to go which is rarely the corners. Measuring and ultimately listening.
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  #19  
Old 09-02-2017, 08:59 AM
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Originally Posted by 2fastdriving View Post
The most optimal solution in my opinion is to get full range speakers and ditch the subs. Where possible, ymmv, etc.
I have used subs now for about 20 years, and each time I have integrated them into my (music audio) system, it's created a lot of frustration, to get the system to "sound just right".

This last time, integrating a pair of F113V2's with a pair of Focal Sopra No2's was one of the most frustrating things I've encountered with this hobby.

Before the subs arrived, I spent the time and got the Sopra's positioned to get the most from them, had that "performer in the room" presentation. The bass that the Sopra's have is very good, but they don't go nearly as deep as any decent sub woofer. But my "man cave" had terrible acoustics in the low bass region; when a bass player was moving up and down the registers, the room added one tone, regardless of what the bass player was playing. It took me a lot of struggle, moving the subs around, and eventually buying a calibration microphone to use with REW to position 10 bass traps, to control the room's resonances. Eventually I got it "just right".

I have an audio buddy who doesn't believe in subs, came over and asked if the subs were playing, to him, it didn't sound like I had subs connected...until I turned off the preamp output to the subs. I think I may have converted his lifelong opinion on adding subs.
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