Rsd 250.2

rh_916 · Post by **rh_916** » Tue Nov 09, 2010 7:17 pm

Just wondering if anybody runs there at 2ohms stereo and if there's any problems since i might get one to run 4 speakers

Post by **Bfowler** » Tue Nov 09, 2010 8:11 pm

should be totally fine. it has a pretty massive heat sink for its size

rh_916 · Post by **rh_916** » Mon Nov 22, 2010 9:46 pm

If i run an 250.2 at 2 ohms stereo would it be sucking more power then an 300.4 or 500.4 running at 4 ohms.

Stryker · Post by **Stryker** » Mon Nov 22, 2010 11:18 pm

rh_916 wrote:If i run an 250.2 at 2 ohms stereo would it be sucking more power then an 300.4 or 500.4 running at 4 ohms.

possibly but 4ohms is usually less current draw....

Post by **Bfowler** » Tue Nov 23, 2010 1:32 am

rh_916 wrote:If i run an 250.2 at 2 ohms stereo would it be sucking more power then an 300.4 or 500.4 running at 4 ohms.

we can do a little math to get a good guess. (i used its non cea rated power)

using I = Sqrt (P / R)

250.2 = sqrt (125/2) (x 2 for each channel) = about 16amps

300.4 = sqrt (75/4) (x4 for each channel) = about 17.3amps

500.4 = sqrt (125/4) (x4 for each channel) = about 22.5amps

of course voltage from your battery will come into play, and the amps efficiency. but it will give you a guess on how far apart they will be

Post by **stipud** » Tue Nov 23, 2010 9:14 am

Bfowler wrote:
rh_916 wrote:If i run an 250.2 at 2 ohms stereo would it be sucking more power then an 300.4 or 500.4 running at 4 ohms.
we can do a little math to get a good guess. (i used its non cea rated power)

using I = Sqrt (P / R)

250.2 = sqrt (125/2) (x 2 for each channel) = about 16amps

300.4 = sqrt (75/4) (x4 for each channel) = about 17.3amps

500.4 = sqrt (125/4) (x4 for each channel) = about 22.5amps

of course voltage from your battery will come into play, and the amps efficiency. but it will give you a guess on how far apart they will be

Amp efficiency will be 50-60% so it makes a substantial difference in the current draw (basically double the numbers you quoted)