What's the difference between 4-ohm and dual 4-ohm?

[MasterForte]

Can somebody explain the difference?

Click to read more...

 

[phemps 10+ year member]

a 4 ohm sub is just that it has an impedence of 4 ohms. and dvc 4 ohm has dual voice coils that give you the option to wire that sub in a final load of 2 or 8 ohms

 

[CarAudioNewbie9 10+ year member]

a 4 ohm sub is just that it has an impedence of 4 ohms. and dvc 4 ohm has dual voice coils that give you the option to wire that sub in a final load of 2 or 8 ohms

Basically what he said. Dual voice coil subwoofers are useful because they give you more wiring options, saving you time, money, as well as hassle. Dual 4 ohm work best in pars because you can wire them to 1ohm giving you max power from your amp.

 

[MasterForte]

Okay thanks guys!

 

[Slammer 10+ year member]

Easy way to tell, dual voice coil subs have two sets of speaker wire connections. By wiring them in parallel (positive to positive and negative to negative) then runing them to your amp, you cut the ohms (resistance) in half. That example is for just one sub. As previously pointed out, a pair of dual 4s, wired in parallel, would be 1ohm at the amp. No one wants a high powered pair of subs that would be wired at 4ohms at the amp. because then you would have to have a ridiculously high powered amp to get their rms power to them. You can run a pair of 500w rms subs which are dual 4s, to 1ohm. This would mean that you would only need a 1,000w amp. However, a pair of 500w rms subs which were single 4ohm, would only be 2ohms at the amp, meaning that you would need an amp that would produce 1,000w at 2ohms. That is not a cost effective way to go about it. You just have way more options with a dual voice sub. Just be sure you do your wire configuring and calculations prior to making a purchase. If you are gonna run one sub, you would want dual 2, as it would be 1ohm at the amp. A dual 4ohm single sub would only get as low as 2ohms at the amp.

 

[Maglite 10+ year member]

Okay thanks guys!

Also two dual-4 ohm subs can be wired into a 1 ohm load.

Therefore, If you run a single 4-ohm sub it would take four subs to run a 1- ohm load.

...Providing the amp can handle a 1-ohm load.