running 8 ohm subs on 4 ohm amp?
I have an Alpine PDX-4 amp that is rated at 4X100W into 4 (or 2) ohms, 2X200 watts bridged into 4 ohms. I was planning on bridging it and running two 4ohm subs at 200 watts. The subs I bought were two Alpine SWS-1043D subs, which were advertised as 4 ohm subs.
What I didn't know was they are DVC (dual voice coil) subs that have TWO sets of connections per sub, 4 ohms each, that have to be run in parallel or in series at 8 ohms or 2 ohms.
So, wanting to use these subs anyway, I am thinking I could get away with running the dual voice coils in series, which on my meter measures at about 6.5 ohms actual, to my PDX-4 in bridged mode. Downside to that would be a less than optimum efficiency; reduced wattage to the subs, but not going to hurt anything otherwise.
The other alternative I am thinking I could run the amp unbridged and connect the two right outputs the the voice coil terminals on one sub, the left outputs to the other, that would show a 4 ohm load all around to the amp. Only downside to that is I have to install a new terminal block for my sub-box that contains two sets of connections for each side.
I'm thinking the first option would be okay, even if it is less that optimum (and probably wouldn't sound much better/worse than the second option). Wanted to get some input -- thanks.