would i be safe wiring a 4 ohm and an 8 ohm sub together in either series or parallel? also the amp i would wanna use is stabel down to 2 ohms.
Its never a good idea to mix different ohm woofers. Especially if in a shared chamber. The 4ohm will be fed more power then the 8ohm sub. Simple ohms law.
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To be specific to your question, yes, it is safe to do so as far as each speaker is concerned. Use the
parallel and series calcs to figure out total load on the amp. As said prior, the speaker with the lower impedance will get the lion's share of power, so be aware.
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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
well i calculated it out and it came to 2.66 ohms. and the subs would be in different air spaces, so when theyre wired into the amp at 2.66 ohms lets say theyre getting 500 watts total. would the 8 ohm woofer only get say like 200 while the 4 ohm woofer could be getting say 300 watts? im just wondering despite the differdnt ohm ratings that they wouldnt each get half of the watts coming out of the amp. and sorry for the wording im just not sure how to word what i want to ask, but thanks man
The power that the amplifier provides is distributed to the speakers according to each speaker's impedance. A 4 ohm impedance is twice the resistance as 2 ohms, and 8 ohms is twice that of 4 ohms, four times that of 2 ohms. A 6 ohm impedance is 1.5 times the resistance as 4 ohms; same rule applies for a 3 ohm compared to a 2 ohm...get the picture?
Even though the two subs are wired together to present a nominal impedance to the amplifier (which causes the amplifier to make power), each has its own impedance that dictates how much of that amplifier's power it will, in return, receive. So using the bit of Ohm's Law that I stated, the 4 ohm speaker will receive twice the power as the 8 ohm speaker.
To figure power distribution to your two speakers, divide the total power by three. (The ratio of power distribution is 2:1, for a total of three equal parts.) With the given amount of 500 watts, 500 / 3 = 166.66 Twice that is 333.33 So the 4 ohm speaker gets 333 watts and the 8 ohm speaker gets 166 watts.
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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.