Thanks Sal. Answering from the split thread:
@mitchco can you fill us in regarding how you combined the LS50 and Rythmik subs? Ron would like to do something similar with his LS50s.
Did you use two different dacs one for subs and one for the LS50s or something else?
I used Audiolense to design a linear phase digital XO and host it in JRiver's Convolution engine. This assumes Ron is into computer audio.... It takes all of 2 minutes to design an XO in Audiolense and after the first measurement, it will become clear where the natural XO is for your room. Readjust the XO and sweep again and usually that is it. Of course, the slopes and width of the XO can be fine tuned, but I have been happy with the out of the box default values. This article where I
integrated subs to mains with Audiolense goes into detail - just replace the JBL 4722's with LS50's as that is what I did with the
LS50's.
Audiolense can independently adjust frequency and timing of each channel/driver/speaker. This is how I use it with my Lynx Hilo. In the case of the LS50's and dual subs, that is 4 analog outputs from the DAC (I have a total of 6 as I cheat and use the headphone out in my three way). I config the subs so all delays, fliters, XO's are turned off and let Audiolense figure out the time differences. It is accurate and repeatable down to a sample.
You can use Audiolense for the linear phase digital XO, and optionally add time alignment, partial room correction up to Schroeder if desired...
It took me 15 minutes to accomplish the tasks above. If it is your first time, may take longer. Audiolense and Acourate are full featured, powerful DSP FIR filter designers. I would consider them the best DSP software products on the market. Audiolense is easier to use.
On the subject of room correction. Audiolense also corrects over time as one can see
in this article, that the group delay can be reduced in the low frequencies and subwoofer article linked above , a maximum phase peak (room reflection) has been cancelled. Finally, I am a proponent of time domain correction and
here you can see a little experiment I ran switching between the subs time corrected and not time corrected.
For those that feel that time alignment or excess phase correction or frequency correction occurs at only one mic position need to have a closer look at how the software does it (e.g. superposition) and my book that shows that this is not the case with measurements. And does it without the need for multiple measurements,
Lol this was a bit more than I intended to write, but adding subs to standmounts is a great idea and this is one of the ways to get the best "technical" performance possible integrating subs with standmounts.
Have fun!