Hai
I have one unit power amp with this spec:
2 x 2,000 Watts into 2 Ohms; 2 x 1,400 Watts into 4 Ohms; 4,000 Watts into 4 Ohms (bridge mode)
and 1 pair speaker with this spec:
capable of handling 1000W peak power (250W continuous)- impedance: 8 ohm
My question: can i use this speakers with the amp i have?
hope somebody can advise me
I have one unit power amp with this spec:
2 x 2,000 Watts into 2 Ohms; 2 x 1,400 Watts into 4 Ohms; 4,000 Watts into 4 Ohms (bridge mode)
and 1 pair speaker with this spec:
capable of handling 1000W peak power (250W continuous)- impedance: 8 ohm
My question: can i use this speakers with the amp i have?
hope somebody can advise me
What's the problem as long as you keep the volume level set to comfortable listening through those speakers ?
A little math may help : ideally the amplifier should double its output power when impedance halves; this seldom happens as there are many engineering obstacles 😱 and the resulting piece of technology would be called a "welder" 😛
So stepping from 2kW @ 2Ω > 1.4kW@ 4Ω > let's say 1 kW @ 8Ω
which meets roughly with the peaky one kiloWatt speakers ( for few seconds ! )
A quick view of what's inside the amplifier and inside the speaker boxes may give a quick analisys of what are the real qualities of the setup, beyond the claimed wattage rating that you can read on paper.
A little math may help : ideally the amplifier should double its output power when impedance halves; this seldom happens as there are many engineering obstacles 😱 and the resulting piece of technology would be called a "welder" 😛
So stepping from 2kW @ 2Ω > 1.4kW@ 4Ω > let's say 1 kW @ 8Ω
which meets roughly with the peaky one kiloWatt speakers ( for few seconds ! )
A quick view of what's inside the amplifier and inside the speaker boxes may give a quick analisys of what are the real qualities of the setup, beyond the claimed wattage rating that you can read on paper.
Agree.
*IF* those ratings are real, you'll blow your speakers quite soon.
Roughly 500W RMS into 8 ohms and 250W RMS 8 ohms speakers do no match well, but that is just a very vague estimation, because we don't know if they are, so please post:
1) what amplifier are we talking about.
Brand, model, and if possible search around and provide a link to some page (manufacturer's would be best) describing it, even beter some spec sheet or user manual.
2) same, but for the speakers.
3) what will you use it for: DJ, PA, some musical instrument, etc.
Today we have no idea of what amplifier or speaker are you talking about.
*IF* those ratings are real, you'll blow your speakers quite soon.
Roughly 500W RMS into 8 ohms and 250W RMS 8 ohms speakers do no match well, but that is just a very vague estimation, because we don't know if they are, so please post:
1) what amplifier are we talking about.
Brand, model, and if possible search around and provide a link to some page (manufacturer's would be best) describing it, even beter some spec sheet or user manual.
2) same, but for the speakers.
3) what will you use it for: DJ, PA, some musical instrument, etc.
Today we have no idea of what amplifier or speaker are you talking about.
I work with PA systems on many festival sites. We always use a loudspeaker that has the same or greater RMS power handling of the amplifier. There is less chance of destroying the voice coils!
I agree with Picowallspeaker, what is the problem as long as you remain sensible with the volume knob? For PA it is different because you don't know who will be behind the desk, but in your own environment with only yourself as operator, nopro. I have been running small speakers with large amps on many occasions.
I'm using this eqp for PA
i'm using this eqp for my PA
- 1 unit powered mixer PMP6000
- 1 unit Behringer EP4000 Europower Power Amplifier
- 2 speaker Behringer B215XL - 1000W 2-Way Passive PA Speaker
- 2 speaker Motivity 8 ohm but i don't have more info about power
i'm confused because somebody tell me it not match.
i'm using this eqp for my PA
- 1 unit powered mixer PMP6000
- 1 unit Behringer EP4000 Europower Power Amplifier
- 2 speaker Behringer B215XL - 1000W 2-Way Passive PA Speaker
- 2 speaker Motivity 8 ohm but i don't have more info about power
i'm confused because somebody tell me it not match.
Let's see:
the power amp is rated 2 x 1,400 Watts into 4 Ohms
I assume is RMS so 700W RMS to each 8 ohms speaker.
The B215 is rated 250W RMS , so the power amp can deliver 3X the RMS power (forget the Peak power nonsense) the speaker gan handle.
It's an accident waiting to happen.
By the way, Behringer does not state anywhere whether the amp watts are RMS or anything else, nor the cabinet impedance.
Nowhere 😡
Obviously their marketing target is unsophisticated users, who will be impressed by the "1000W !!!!!!!" label 😛
What can happen if i'm using 4 8ohm speaker for this amp. 2 B215XL and 2 motivity 250w 8ohm speaker
Actually, Behringer did state that EP4000 amplifier has 550W RMS/8ohm and 950W RMS/4 ohm per channel at 1% THD, see page 11 of the user manual:
http://www.behringer.com/assets/ep2000_p0a38_m_en.pdf
Also, Behringer did state B215XL cabinet impedance at 8 ohm, see page 8 of the user manual:
http://www.behringer.com/assets/B215XL-WH_P0A0U_M_EN.pdf
I agree that EP4000 is too powerfull for the B215XL. Use with care.
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Smoke and fire. Or loud music all night long, if you are careful.
If you connect two B215XL in parallel to one amp channel and two Motivity in parallel to other amp channel, then amp "sees" 4-ohm load and can deliver 950Wrms total per channel, or 475Wrms per each speaker. Too much, but manageable!
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Oh, I didn't go as far as downloading a 15 page PDF and reading it wall to wall, just straight checked Behringer's official page about it Behringer: EUROPOWER EP4000
and no way to find the letters "RMS" 😱
In fact, to check I hadn't missed them I performed a ctrl+f search in the page and then they did appear ... as part of the "TeRMS of Use" phrase 🙄
Yet at the official Behringer page about the cabinets Behringer: EUROLIVE B215XL , you can find them, called continuous Watts, which is acceptable.
Anyway fully agree that the point is that the amplifier is way too powerful for the speakers.
As of "being careful", using high powered amplifiers at home is generally safe, and it translates to clean headroom, because neighbours/wife don't allow use above, say, 10% of the amp capability, but in a DJ or PA environment, it's different.
That's why I suggest using powered speakers: perfectly matched at Factory plus, very important, they have electronic crossovers, separate power amps and most important, carefully set *limiters* are built in,protecting everything from overload (by avoiding it) .
Not so in a big amp + passive crossover cabinets situation.
I have often used higher-power amps with lower-power speakers. But for live PA with mics and instruments rather than recorded program material, I tri-amp with sharp filters at both ends of each of four bands and then a sharp peak limiter on each output. Otherwise, you can be riding the sliders for optimal headroom and the first time you get feedback thru the monitors, even with automatic feedback destroyer filters, all the high-end horns just blew, and the first time you get a good howl thru the mains, all the mid drivers got cooked voice coils and deformed formers, and the first time the bass drum mic falls over the woofer cones buckle trying to turn inside out.
I would be very reluctant to attempt using over-powered speakers for live PA with mics, direct boxes, shallow passive crossovers, no infrasonic filters, no ultrasonic filters, no limiters on each band. Not only is it an expensive proposition, it has a lot of potential to damage the hearing of the audience...for a very short time...followed by near-silence and some distortion. Those things tend to happen early in a show, too. If you hurt the ears of the performers, the entire performance suffers after that, and you will really hear about it...if you can. If you're deaf then too, you will read about it.
I would be very reluctant to attempt using over-powered speakers for live PA with mics, direct boxes, shallow passive crossovers, no infrasonic filters, no ultrasonic filters, no limiters on each band. Not only is it an expensive proposition, it has a lot of potential to damage the hearing of the audience...for a very short time...followed by near-silence and some distortion. Those things tend to happen early in a show, too. If you hurt the ears of the performers, the entire performance suffers after that, and you will really hear about it...if you can. If you're deaf then too, you will read about it.
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This should be a sticky in the PA/live sound page 🙂
You are describing exactly the OP system as it is today
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