Is a power amp that has 2x400W at 8 ohms enough for 4 units of 700W speakers? What will happen if it isn't?

Question

700W each speaker at 8ohms

Answer 1

Sounds like you want to hook up four (4) speakers to a power amp. The amp is 400 watts per channel at 8 ohms. The speakers are rated for 700 watts at 8 ohms. I assume you will hook up the speakers either in series or parallel, two per channel. If hooked up in series you will have a 16 ohm load, if you hook up on parallel you will have a 4 ohm load. Is your amplifier rated for 4 or 16 ohm loads? If yes than you can use them, if no then you run the risk of burning out your amp.

Answer 2

700 total or each?? Doesn't matter much - that is maximum rating, probably at peak power, which doesn't mean a great deal. They'll start producing sound at as low as one watt input. Generally, the amp should be at or higher rating than speakers for distortion reasons. An average of 10 watts/channel during normal use will be pretty loud. To double the volume cleanly requires 10 times the amp output!
Anyway, you are quite safe (are the speakers also 8 ohms, btw?? If 4 ohms, check the amp information that 4 ohms is OK.
If you do not have the manual for the amp, output precautions are sometimes printed right on the amp's back plate.)

Answer 3

If you have a 2 channel amp, you don't have enough power supply for 4 speakers. Speaker "wattage" is not a real concern, unless you are worried about blowing the speakers. It is usually accepted that a speaker can be powered by amplifiers rated twice the capacity of the speaker. However, the more important ratings of a speaker is the resistance or load capacity, measured in ohms and the sensitivity of the speaker measured in decibels.

Answer 4

hi the dimensions of the audio equipment isn't your massive concern or the amplifier. the concern is often the cupboard they are contained in as this rather is what produces the quantity point such distinctive little ones run away with this type of thinking. so the amplifier is rated at one thousand hz at it is output impedance of four ohms . the two audio equipment utilized in parallel jointly are 4 ohms at 250 watt into seven-hundred watts of speaker. so the speaker coils are much less in all probability to burn out whilst utilized in suitable designed cabinets. they'll sound rubbish and not utilizing a cupboard of a few first rate length by way of sound and the frequency at which it travels. sound travels at approx 1500 ft according to 2d so a 20 hz tone desires a cupboard the place the gap from front to diminish back of the speaker cone ought to be a minimum of 75 ft in length fixed on a baffle board of a minimum of two x situations the speaker in is diameter those gadgets are a minimum of 18 inch in diameter so a baffle board of a few 36 inches by utilizing 36 inches made out of MDF and being a minimum of one million inch thick 25mm. the cabinets for each it rather is it ought to be in a fold horn cupboard the place the horn is 75 ft long. so as to furnish a transmission line studio high quality sound this is little need putting those in a automobile or van made out of metallic as in basic terms you will get is purely growth growth no longer music yet purely noise.

Answer 5

very not enough... the volume(sound level) would be lower than expected. you might even end up burning the amp's drivers

you might be able to use two of the 700W speakers though... still the sound level would be low.