Is 60v too much for 4ohm drivers?

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Votandrums
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Joined: Tue Sep 25, 2018 4:56 pm

Is 60v too much for 4ohm drivers?

#1 Post by Votandrums » Tue Aug 20, 2019 8:56 pm

Ok so im finally done building my two t48's amp rack and all cables. I have a gig on the 31st and it'll be my first outing as a soundman and using bfm gear. My question ia this. I have 3015lf drivers in my t48s that are 4ohm. I know 8ohm is desireable but they were priced at half price and 2 is all I see us needing anyway.
In doing calculations im getting 42v should be my limiter setting but the plans say 60v for the 3015lf without mention of impedance. Should i use the 60v or my calculated 42v? Also what frequency test tone should i use to set my limiter. I searched and could not find the thread on how to set a limiter. Maybe im doing something wrong there but i didn't want to ask without searching first.
Off topic but when i did my leak testing i couldnt help it but i ran a 40hz test tone and turned it up pretty good. It sounded like a freight train was running through the house. That was just one cab. I cant wait to see what these things are gonna do live and at full volume.
Last edited by Votandrums on Tue Aug 20, 2019 11:45 pm, edited 1 time in total.

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Bill Fitzmaurice
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Re: Is 60v too much for 4ohm drivers?

#2 Post by Bill Fitzmaurice » Tue Aug 20, 2019 9:07 pm

60v will toast a 4 ohm 3015LF. 42v is correct.

SethRocksYou
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Re: Is 60v too much for 4ohm drivers?

#3 Post by SethRocksYou » Tue Aug 20, 2019 10:20 pm

50 or 60hz sinewave seems to be the common frequency to set sub limiters, speakers disconnected.

Votandrums
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Joined: Tue Sep 25, 2018 4:56 pm

Re: Is 60v too much for 4ohm drivers?

#4 Post by Votandrums » Tue Aug 20, 2019 11:40 pm

Awesome thanks for the replies. Ill do the setup tomorrow afternoon. I love this forum. Now to finish my OT12's and get rid of thr muddy jbl 2x15 mains.

Grant Bunter
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Re: Is 60v too much for 4ohm drivers?

#5 Post by Grant Bunter » Wed Aug 21, 2019 3:06 am

What are you using for your limiter?
We can collectively help out in no time (I now have both a DCX and a PA2+, so know either...)
Built:
DR 250: x 2 (melded array) with March 2012 plans. 2 more under way with CD horn
T39's: 4 x 20" BP102 , 2 x 28" 3012lf.
WH8: x 3 with melded array.
Bunter's Audio and Lighting "like"s would be most appreciated...

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