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Message
Overpowering PA Speakers?
Posted on 9/27/17 at 10:55 am
Posted on 9/27/17 at 10:55 am
I am looking to play some music at our tailgate this weekend through my PA. I have a 350w Behringer head. When I play gigs I run it through Yamaha A15's but they are bulky and and I would prefer to not bring them to a tailgate. I have an old set of 10", 60 watt speakers that I would like to use. If I keep the volume at <25% on the PA head, can I feasibly run that kind of setup or will it blow the speaker right off the bat?
I have never had a real firm grasp on sound equipment so any help would be appreciated.
I have never had a real firm grasp on sound equipment so any help would be appreciated.
3
Posted on 9/27/17 at 11:42 am to Drunken Crawfish
Knowing Behringer like I do, (I work for a company who is a direct competitor to them) that amp isn't really pushing 350w, probably less than half of that - at RMS.
You will probably be ok IF you run the amp at a low to mid volume. You can tell when they start to break up, you should start backing the volume down.
I say test them out beforehand.
You will probably be ok IF you run the amp at a low to mid volume. You can tell when they start to break up, you should start backing the volume down.
I say test them out beforehand.
Posted on 9/27/17 at 11:53 am to moon
Much appreciated. I am assuming people will want to hear a little rap music, should I be worried about any of the low end frequencies?
Posted on 9/27/17 at 3:10 pm to Drunken Crawfish
Anytime.
With 10" speakers that can only handle 60w, not going to get too high with lower freq like you'll find in Rap.
You ever seen those Caprice Classics with the 6x9's in the back window?
With 10" speakers that can only handle 60w, not going to get too high with lower freq like you'll find in Rap.
You ever seen those Caprice Classics with the 6x9's in the back window?
Posted on 9/27/17 at 5:59 pm to Drunken Crawfish
Distortion is what causes heating of the voice coil and kills speakers, the higher the power of the amp the better regardless of the speaker rating as it will produce the required power for the desired volume level with less distortion.
The amount of power required for a speaker to produce a given sound level is determined by the efficiency of the speaker, and is independent of the amplifier. In other words if you have a 100 watt amp and a speaker is using an average of 15 watts to produce the desired sound level and you connect a 1000 watt amp and set the volume for the same sound level the speaker will still only be using 15 watts.
I have used home stereo speaker rated for 100 watts with a 500 watt per channel amp for years, it is not a concern.
The amount of power required for a speaker to produce a given sound level is determined by the efficiency of the speaker, and is independent of the amplifier. In other words if you have a 100 watt amp and a speaker is using an average of 15 watts to produce the desired sound level and you connect a 1000 watt amp and set the volume for the same sound level the speaker will still only be using 15 watts.
I have used home stereo speaker rated for 100 watts with a 500 watt per channel amp for years, it is not a concern.
Posted on 9/28/17 at 4:39 am to EA6B
quote:
Distortion is what causes heating of the voice coil and kills speakers, the higher the power of the amp the better regardless of the speaker rating as it will produce the required power for the desired volume level with less distortion.
The amount of power required for a speaker to produce a given sound level is determined by the efficiency of the speaker, and is independent of the amplifier. In other words if you have a 100 watt amp and a speaker is using an average of 15 watts to produce the desired sound level and you connect a 1000 watt amp and set the volume for the same sound level the speaker will still only be using 15 watts.
I have used home stereo speaker rated for 100 watts with a 500 watt per channel amp for years, it is not a concern
Great post. I learned stuff.
Posted on 9/28/17 at 7:25 am to Drunken Crawfish
To piggyback off of EA6B, you are much more likely to blow your speakers by underpowering them due to all the distortion induced by running at or near the max power output of the amplifier in an attempt to, "Turn it up dude."
Can you still pop them by over powering them? Sure but I doubt it will be an issue.
So that Behringer head is rated at 350? Well that's 175 per channel. At what ohm rating? Most likely they rate that at 4 or even 2 ohms in order to make that number appear bigger for marketing purposes because "More Power!!" So realistically depending on what resistance rating your speakers are, most likely 8 or even 16 ohm, your amp is probably only pushing around 80 watts per speaker.
Can you still pop them by over powering them? Sure but I doubt it will be an issue.
So that Behringer head is rated at 350? Well that's 175 per channel. At what ohm rating? Most likely they rate that at 4 or even 2 ohms in order to make that number appear bigger for marketing purposes because "More Power!!" So realistically depending on what resistance rating your speakers are, most likely 8 or even 16 ohm, your amp is probably only pushing around 80 watts per speaker.
Posted on 9/28/17 at 9:40 am to Wrenchruh
Thanks for the info, guys. 
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