question on ohm loads and wattage

[bigdub_diesel 10+ year member]

ive got a memphis PRD1000.1, 1000 watt 1 ohm stable mono amp, and it says that at 1 ohm the rms power is 1000 watts, and at 4 ohms, the rms power is 300 watts. my first question may sound kindly dumb, but i want to be sure. If I have one single 4 ohm voice coil 300 watt sub on this amp, it will be a 4 ohm load, and it will give me 300 watts from the amp, give or take some, with the gain set correctly, right? my second question is im getting 2 more subs, so all three will be a 1.34 ohm load on the amp, and then i will have 900 watts rms in my subs. well, im taking for granted that since a 2 ohm load on the amp is 600 watts rms, and 1 ohm is 1000 watts, that a 1.34 load will give me 867 watts aprox. from the amp. im also gonna take for granted that this memphis is a bit underrated, and will proly be about 900 watts, which would be pretty close to the wattage of my subs, am i correct in this assumtion?

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[PhatTonyDeMarco 5,000+ posts]

Yes.

Yes.

 

[bigdub_diesel 10+ year member]

im sorry to make you read all that when i was pretty sure that was right, but i just wanted to be sure. im tight on money and i dont wanna take a chance on messing something up. thanks though

 

[bigdub_diesel 10+ year member]

im sorry, but one more, so, u say by "theory", each sub added is around 3 dbs, and doubling the power is 3 dbs as well, so with 2 more subs, and my amp putting out about 3 times more power, it could be roughly 10 db increase? i know there are a lot of factors in it, but thats the basic theory, correct?

 

[Jdizzle 10+ year member]

well...theres more to it than that really