Hi,

I have a mustang amplifier and a 1996 beretta with a CD player radio.....

I have two 4 ohm resistors and four 4 ohm speakers.....

what would be better to make all two speakers on left rear of car and two speakers on right rear of car?

on each side:
4 ohm resistor in line with 4 ohm speaker and that total in parallel with another 4 ohm speaker

OR~~~~~~

on each side:
4 ohm speaker in line with 4 ohm speaker.......

it is a 4-8 ohm amplifier.......

I have 4 speakers but how to assemble them into the car is another question.......

Thanks in advance,

Buster

This is a bad idea.

The reason being that the 4 ohm resistor will dissipate as much power as the 4 ohm speaker, which will probably be dozens of watts. This will get the resistor VERY hot, and it will likely destroy itself within a matter of hours. If you're lucky, it won't start a fire. By ohm's law, this makes sense, but in practice, it's a really bad idea.

It would work at very low volume levels, perhaps, but it is very much inadviseable.

Better would be to use 8 ohm speakers in pairs to present a 4 ohm load.

If you must use those particular speakers, then it would be better to just put them in parallel. This will present a load that is somewhat lower than the nominal 4 ohms, which will have the amplifier actually delive more power.

Withy the resistor in place, you will get less overall power, and of that, 1/4 of it will be dissipated as heat (for as long as the resistor lasts.)

The one thing that you'll have to be careful of though is that with the lower load (4 ohm & 8 ohm in parallel is 2.67 ohms) is that you will be drawing more power from the amplifier, possibly more than the power suply can reasonably deliver, however this is really only a problem at high volume levels. You'll also be pushing the heat limits of the output driver transistors, but as long as you're being reasonable with the volume control, this shouldn't be a problem. Also, the nominal impedance of a speaker is just that: nominal. The actual impedance of a speaker follows a curve.

Also remember that the 4 ohm speaker will be dissipating twice as much power as the 8 ohm speaker. Keep that in mind also.

A solution similar to this could be made to work, but you'll spend more in time and money than if you just bought another decent set of speakers, or an amp

Hi, zBuster. As Supra Guy said, it is a lost of power to use a resistor as load. Yuo can use a DIY pasive two way crossover.

It depend of the speakers that you have but is possible to use the 4 ohm one as sub-woofer and the 8 ohm one as mid-bass and high.

If one of the speaker that you choose to use as woofer is coaxial type, take off the twiter and connect it to the other speaker

Good luck.