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Add together the Wattage of the subs. Eg: 200W each sub = 400W amp.
However, that's not the only thing to consider. You have to take into account the impedence(ohms) and how you're going to wire them.
Let's assume your subs are both rated at 200W and 4 ohms.
Wired in series you will need an amp capable of 400W @ 8 ohms.
Wired in parallel you will need an amp capable of 400W @ 2 ohms.
Those are two very different amps!
It's much easier to find an amp capable of working at 2 ohms than it is to find an amp that will work at 8 ohms and give you any kind of power.
Another thing to consider is(and this is my rule of thumb, not an absolute law that must be followed) that an amp, should be 30% more powerful than the speakers it is driving. So that 400W I mentioned at the begining shouldbe more like 500W.
If you take your speaker specs(Watts & Ohms) to your local dealer and tell him/her you want to wire them in parallel they can figure out what your power requirements are and help you pick a suitable amp.
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Stereo amp or mono amp for your sub?
Most preamps just have a mono output for a subwoofer. No real reason to run stereo for subs, unless maybe you are running two speaker boxes as subs. Most amps are switchable to mono mode and put out more power in mono. Hope this helps.
Is 4000 watt amp too much for two twelves subs?
Not if subs are rated for 2000 watts each.
What do you set your amp to for 2 12 subs?
to mono if your amp will allow, also this is for single voice coil. otherwise run in mono parallel to run dual voice coils.
For sub woofers do you need a mono amp or a 2 channel amp?
Depends if you are building heavy bass system with quite a few subs then a mono amp would be suggested but if it is just a single sub just for a standard bass upgrade then a 2 channel amp would be fine you can still use a mono amp on one sub just remember to take into perspective the RMS rating and the Impedance on both the Subs and the Amp
What size kicker amp do i need for a kicker comp subwoofer. do i need the mono or class d amp 300watt?
When buying an amp its best and safe to use the 1:1 ratio. That would mean if subs RMS was rated at 350 watts then get a 350 watt amp. Alot of installers will use 3:1 ratio because the subs max rated at 1200 watts so they say you will need a 1200 watt amp. But the truth is that sub may only peak a fraction of a millisecond. So unless your competing for a title championship there is no need to destroy you subs that you paid so much for.
Can you power one 12 inch sub and two 8 inch subs with one 1600watt mono amp?
That depends on the power ratings of the subs.
What would be a good amp for 2 Hifonics BRZ12SQD4 subs?
a hifonics mono with the same or more rms
Can you hook up two subs to a mono channel amp?
yes all u have to do is bridge them together
What sub should I get for a 1100 watt mono amp can I use two and wire them together how many watts should they be?
Depends on the rms or continuous rating of the amp and at what ohm is the amp stable
Can two 12 alpine type e subs handle an alpine 450 watt mono amp?
yes
What do you need to power an 800watt mono amp and two 1000 12 subs without killing the battery?
A bigger alternator.
Will a 1000 watt amp power two fosgate p3 12inch subs?
In a sense it would, say that 1000 watt amp was a mono channel. that would mean its 1000 watts RMS @ 1-0hm, 2 RF p3 4ohm would make it 500 watts to the two. if you want full power you need a 1200 watt amp @ 1-ohm, that would make it 600 watts to the 2 and that is the RMS of those subs. you can run more but running above RMS can blow or distort the subs.
