Ohms?

[Haibane]

I heard somewhere that wiring 2 speakers to 2 channels positive, positive, negative negative is still a 4 ohm stereo load, I have 2 SVC subs 4ohms each and I was wondering how to get a 2ohm stereo load, if possible for the subs

[sr20de4evr]

When wiring subs you always have 3 choices, series, parallel, or just straight + to + and - to -. The choice you make depends on your subs and amp mainly. To calculate the final ohm resistance of a series setup, you just add the ohms of each component in the series connection (2 4ohm subs = 8ohm final load). To calculate the final resistance of a parallel setup you take the inverse of each component and add them together, then you take the inverse of the answer (inverse of 2 4ohm subs = 1/4 + 1/4 = 1/2, so the final load is the inverse of 1/2 which is 2ohms). The third choice is the simplest, basically you have a 4 ohm sub, you hook it up to the amp and you have a 4ohm load. It is impossible to have 2 4ohm subs and have a STEREO 2ohm load. In order to have a stereo setup you have to wire each sub individually, which means you would have to have a 2 channel amp and wire each sub to each channel, which means you would have a 4ohm load on each channel. If you wanted a 2 ohm load then you would simply wire the subs in parallel and bridge the amp (or if it's a mono amp then just hook it up to that 1 channel), completely eliminating the stereo setup.

However, having stereo is pointless when you're talking about subs, because they're omnidirectional. If you have a sub on the right and a sub on the left playing the right and left channels respectively, you won't be able to tell the difference at all because the bass just mixes together and forms 1 sound. And I guarantee you if you have 2 subs in the trunk playing stereo, you would NOT be able to hear the right sub and the left sub as the right and left, it would just be weaker bass when only one channel is playing.

If you want a 2 ohm load and you have a 2 channel amp your only option is to bridge the channels and wire the subs in parallel (just make sure your amp can take a 2ohm load when bridged)

[Haibane]

basically what I already knew, just hoped you would tell me different, lol

[SC300LeXuS]

one thing, im pretty sure you got the series and parallel Ohm equations backwards, 2x4ohm subs wired in series =2ohms, 2x4ohm subs wired in parallel =8ohm, direct wiring 4ohm = 4ohm

[GSteg]

no..he got it right.

2 SVC 4ohm wired in series=8ohm
2 SVC 4ohm wired in parallel=2ohm

[PaulD]

parallel ... depends on how the DVC is wired per speaker

if each DVC sub is wired in series .... each sub will be 8 ohms
if you wire these two in series it will be 16 ohms
if you wire these two in parallel it will be 4 ohms

if each DVC sub is wired in parallel .... each sub will be 2 ohms
if you wire these two in series it will be 4 ohms
if you wire these two in parallel it will be 1 ohms


DVC's just give you more flexibility in wiring