Members RoadRanger Posted June 19, 2016 Members Share Posted June 19, 2016 Just for yucks I picked up a couple of these cheap ($75 each) that had already been modded to stack (extra cup installed on the top of one) and I finally got to try them out tonight in my little XR12 based rig. I ran a single stack of these two stacked, over a pair of 8 ohm 15" subs using the two channels of an NU3000 with my XR12 mixer set to do a 24db/oct 125Hz crossover. The LA4's were significantly more efficient than expected - I had to boost the sub channel by 3 db to even them out (and these are efficient subs, half the ohms, and I'm not a "hot subs" guy). I guesstimated a 12db boost at 16KHz using a PEQ of Q=4 from the spec sheet and it was pretty close - nice clear highs, no feedback, and the LA4's were even maybe a bit "in your face" at the upper mids (JBLish ) but great for live sound. I need to fabricate a shorter pole and make it all tighter but I have a winner here . This was for a full four piece band (3 vocals, heavy hitting drummer, bass direct no amp, guitar, and keys direct no amp) in a medium-small venue (200 cap?) and I'd guesstimate it could have handled twice that no prob. The dispersion was so good that nobody noticed it was a single stack until I pointed it out . With the two stacked for a total "hang length" of 3-1/2 feet they even start to be a real line array kinda sorta . I was previously using a pair of Behringer B208's but wanted to go with passive tops to cut down on the cabling - I already had the NU3000 in the rack for the subs. I've used Bose 802's in the past so am not a stranger to radical EQ . Link to comment Share on other sites More sharing options...
Members dedmeet Posted June 20, 2016 Members Share Posted June 20, 2016 I ran a single stack of these two stacked' date=' over a pair of 8 ohm 15" subs using the two channels of an NU3000 with my XR12 mixer set to do a 24db/oct 125Hz crossover.[/quote'] Umm, last I checked, the XR series does not have any crossover functions included. Link to comment Share on other sites More sharing options...
Members RoadRanger Posted June 28, 2016 Author Members Share Posted June 28, 2016 Umm' date=' last I checked, the XR series does not have any crossover functions included.[/quote']You can switch the six bands of PEQ on each bus to HPF's and/or LPF's . They are only 12db/octave but you can "stack" a couple for 24db/octave. Link to comment Share on other sites More sharing options...
Members RoadRanger Posted July 18, 2016 Author Members Share Posted July 18, 2016 Took another look at the published curve and pulled down the 3K a bit with a G=1 PEQ and got rid of the "in your face-ness". I really have to take the rig outside and pink it but it's getting rave reviews so far . BTW don't think I mentioned that these guys are only 15 lbs each. "Flown" over my 25 lb subs they were a real joy at the two load-outs I had to do this weekend. Unfortunately lost a channel on my older NU3000. I'll swap it out for a Carvin DCM2004L I've had for some time but didn't use as it doesn't have TRS inputs - cables on order . So my XR12 based FrankenBass rig/PA will only be 8KW now but have eight independant channels of amplification (up from six). Link to comment Share on other sites More sharing options...
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