Amp question...?

Question

i have mono amp, 1 channel, but there are two spaces available for plugging in subwoofers. it is 550 watts x1 @ 4 ohms and 900 watts x1 @ 2 ohms. If i plug in two subwoofer, rated at 4 ohms, one in each plug in, does that make the viewed impeadance 2 ohms and give out 900 watts rms or only 550 watts rms? i'm confused.

the amp is the Sony XM-D9001GTR

Answer 1

Not to worry with the confusion.  If you wire two single voice coil, 4 ohm subs to your amp, it will see a 2 ohm load and provide 900W (450W to each sub).  The amp is designed that way to make wiring easier.  So hopefully ... it doesn't have you confused for long.

Answer 2

they're still meant for only one subwoofer they just have four inputs because some dual voice coil subwoofers need to be wired using all four

Answer 3

Depends, if your subs are both single 4, then you'd get a 2 ohm impedence.  If your subs were dual 4 load, then you'd wire then down to 1 ohm, and i don't think that amp is 1 ohm stable.