Thoughts on 2.5 ohm load

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oldschooldj

DJ Extraordinaire
Jul 7, 2012
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FT. CAMPBELL
Guys,

I was helped by a very intellegent young sound engineer from EV (Bosch) last week with fine adjustments to my EV DCONE. He told me my Q1212 amp would run comfortably with 6 EV-TX1181 subs at a 2.5 to 2.7 ohm load, even driven hard. I run 4 of those subs on the amp with no problems at all, I just never ran anything into a 2 ohm load.

Should I expect any change in sound quality? He said if driven to the 0 db level for long periods the fans would run a bunch but the Q1212 is extremely stable at a 2 ohm load. Make me smarter on what is going on here at the load both in current and sound quality.

The only reason I bring this up is, I have a few giggs coming up where I will play some large rooms, twice the size of a normal HS gym( plus or minus) and I may have to add subs. Yes I have four but I am guessing 6 or 8 subs, as this will be HS teen music.

I do have an extra Q1212 amp, and could drive 8 subs at four ohm loads on both amps, but what do you suggest if I only step to 6 subs with the amps I have available?

Additionally, at 6 or 8 subs do you run all in a row togehter in front (coupled as I do my four) or do you stack 2 subs high in a row of 6 or 8? I had thought of with 8 going 6 across centered with a stack of two each on the ends, with a pair of tops on that stack and my other tops in a support roll up higher on the stage with tripods.

Thanks Ray J.
 
While you can run it there, not sure you will be buying much. In stereo you'll be seeing 1800 w maximum per channel (can't bridge as the minimum is 4 ohms), which would be 600 per sub, well below what they should be getting (should be 1000+), so you'll end up pushing the amp to the max and possibly clipping. With your subs, best practice would be 1 amp per 2 subs. You can do 4 per amp, but the math says you'll be limiting the available current to each sub.

As for how to set up 6 subs, I would either use 1 each as a pole mount for the tops and center cluster 2 over 2 (or 4 wide) the others .. or .. I would set up a cardioid sub array (3 stacked, 1 firing to the rear). That would probably require another DCONE or equivalent as some of the subs have to be delayed.

Some reference: http://www.nordic.dk/_da-DK-I/Conte...F/Download center/Lydafdelingen/d&bTI-330.pdf

and

http://www.google.com/url?sa=t&rct=...6oGwBg&usg=AFQjCNGXLRbNMBzIqygVxC-YdsB7R2dObA
 
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