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Re: FREE SUB PLAN: Dual Lab12 (Front Loaded) by Welter SystemsThe dual lab 12 design looks really nice especially if extended LF output in a small box matters more than absolute output at a little higher frequency. I am anticipating a sub build coming up for the church youth system (the 21" RCF cabs I built previously were so good that they got taken from the youth system I built them for and used in our main sanctuary system in place of 3 EAW dual 15's). So I am strongly considering a pair of the dual lab 12's here vs a pair of single 18" cabs. Because of cost I would opt for the tbx100 rather than the sw115 (one tbx100 costs about the same as 2 lab 12's). So from your testing of the dual lab 12 vs sw115 you say the sw115 will give 3db more output with twice the power. B&C has a recommended enclosure for the sw115 with fb of 35 hz and excursion limited output of 124.9 db and their recommended enclosure for tbx 100 gives fb of 34 hz and excursion limited output of 120.3 db. Given that, do you think it would be safe to say the tbx100 in said enclosure would be pretty similar to your dual lab12 design. Granted the box for the tbx 100 is a fair bit larger. Does the single 18" have any advantage I am missing or would the dual lab 12 be a better choice since the box is smaller and output is very similar? Power will likely be an MA2400 so that would be one dual lab 12 per channel or both 18's on the bridged amp so the dual lab 12 would likely see slightly less power but not significantly so.Thanks for any thoughts,Loren Jones
Re: FREE SUB PLAN: Dual Lab12 (Front Loaded) by Welter Systems
The dual lab 12 design looks really nice especially if extended LF output in a small box matters more than absolute output at a little higher frequency. I am anticipating a sub build coming up for the church youth system (the 21" RCF cabs I built previously were so good that they got taken from the youth system I built them for and used in our main sanctuary system in place of 3 EAW dual 15's). So I am strongly considering a pair of the dual lab 12's here vs a pair of single 18" cabs. Because of cost I would opt for the tbx100 rather than the sw115 (one tbx100 costs about the same as 2 lab 12's). So from your testing of the dual lab 12 vs sw115 you say the sw115 will give 3db more output with twice the power. B&C has a recommended enclosure for the sw115 with fb of 35 hz and excursion limited output of 124.9 db and their recommended enclosure for tbx 100 gives fb of 34 hz and excursion limited output of 120.3 db. Given that, do you think it would be safe to say the tbx100 in said enclosure would be pretty similar to your dual lab12 design. Granted the box for the tbx 100 is a fair bit larger. Does the single 18" have any advantage I am missing or would the dual lab 12 be a better choice since the box is smaller and output is very similar? Power will likely be an MA2400 so that would be one dual lab 12 per channel or both 18's on the bridged amp so the dual lab 12 would likely see slightly less power but not significantly so.Thanks for any thoughts,Loren Jones
