What is the nominal impedance of subwoofers wired in parallel as described?

When subwoofers are wired in parallel, the combined nominal impedance can be calculated using the formula for parallel resistors. The formula is:

1 / Z_total = 1 / Z1 + 1 / Z2 + ... + 1 / Zn

If you consider two subwoofers, both with a nominal impedance of 4 Ohms, the calculation would be:

1 / Z_total = 1 / 4 + 1 / 4

1 / Z_total = 2 / 4

1 / Z_total = 1 / 2

Therefore, Z_total = 2 Ohms.

This process shows that when you wire subwoofers in parallel, the total impedance decreases compared to the impedance of each individual subwoofer, leading to a 2 Ohm total impedance when two 4 Ohm subwoofers are connected in parallel.

Choosing the option indicating 2 Ohms is accurate based on this parallel wiring calculation.