car audio help

[skylineGTR_guy]

I'm building a new system as my old one got stolen, and I have a few questions

1. In a Dual voice coil sub, is the impedance shown the total impedence, or is it impedance per coil? Or does it need to specify which is the case?

2. Is it possible to bridge a 2 channel amp and wire the single speaker in parallel by taking both ends of 2 speaker wires and attaching them to the amp (2 on one + terminal and 2 on the - terminal) then wiring the other end to the sub as if it were in parallel? If so would the impedance still be 2 ohm asuming a 4 ohm speaker?

3 If a 2 channel amp is say 400x2 and the DVC sub is wired with an independent setup (1 channel to each coil) is the subwoofer now getting 800 wats or is it still considered 400?

 

[wfooshee]

1. Impedance per coil, as that's the load presented to the amp.

2. By "single speaker" do you mean the same dual-voice coil sub? So you're bridging the amp to make a monaural amp, and then driving both voice coils with it. If that's what I'm understanding, it would be a 2-ohm load if the voice coils were 4 ohms. Make sure the amp can take it. I don't think there would be any gain from driving a single coil with the single-channel, though, or even leaving it 2-channel and driving each coil separately.

3. Each coil is getting a (theoretical) 400W signal, totalling 800.


To find out which you like best, try it each way. It's not that hard to change the connections, and you might be surprised to learn that 10 quajillion watts into a fraction of an ohm is not really better than a regular 2-channel dual-coil setup.

 

[skylineGTR_guy]

1. Impedance per coil, as that's the load presented to the amp.

2. By "single speaker" do you mean the same dual-voice coil sub? So you're bridging the amp to make a monaural amp, and then driving both voice coils with it. If that's what I'm understanding, it would be a 2-ohm load if the voice coils were 4 ohms. Make sure the amp can take it. I don't think there would be any gain from driving a single coil with the single-channel, though, or even leaving it 2-channel and driving each coil separately.

3. Each coil is getting a (theoretical) 400W signal, totalling 800.


To find out which you like best, try it each way. It's not that hard to change the connections, and you might be surprised to learn that 10 quajillion watts into a fraction of an ohm is not really better than a regular 2-channel dual-coil setup.

Yes you understood correctly and thanks so much for the help, it all makes sense now 👍