I now run a PPI DCX 1000.1 running 2 IDQv3 subs. A shop in town has had this US amp MD23 sitting on the shelf for a few years now never been used and has marked it way down. Comparing the specs it seems like the US amp would be better for SQ but it is an A/B so the PPI is probably more efficient. PPI S/N 80%, US amp S/N 105%, PPI damping 50, US amp damping 600. I also like the fact that I can run my subs at 2ohms instead of 1 ohm. Anyways this is something I don't have to do but it would be nice to try something new. I don't want the US amp if it's going to drain my electrical system real bad. Any input would be greatly appreciated

What vehicle is this going in? And do you have your electrical already upgraded for the PPI?

If you are wired at 1 ohm now how do you plan on wiring it to a 2 ohm load?

If you are wired at 1 ohm now how do you plan on wiring it to a 2 ohm load?

I was wondering the same thing

PPI S/N 80%, US amp S/N 105%,

Not an audible difference.

PPI damping 50, US amp damping 600.

Not an audible difference.

I don't want the US amp if it's going to drain my electrical system real bad. Any input would be greatly appreciated

The difference is going to depend on the efficiency of the amplifiers and how strong your electrical system is. The Class D is going to be more efficient with music (meaning at much less than full power) but at or near full power the efficiency difference is probably not that great.

If you are wired at 1 ohm now how do you plan on wiring it to a 2 ohm load?

I was wondering the same thing

My guess would be that he meant he is going to wire one sub per channel @ 2ohm per channel instead of running them mono @ 1ohm. Or he could just bridge the amp and wire them in series for a 4ohm load. Same difference.

PPI S/N 80%, US amp S/N 105%,

Not an audible difference.

PPI damping 50, US amp damping 600.

Not an audible difference.

I don't want the US amp if it's going to drain my electrical system real bad. Any input would be greatly appreciated

The difference is going to depend on the efficiency of the amplifiers and how strong your electrical system is. The Class D is going to be more efficient with music (meaning at much less than full power) but at or near full power the efficiency difference is probably not that great.

Right on about the efficiency. IIRC Class AB amps get MORE efficient the harder they run whereas the Class D gets less efficient. At close to max levels they are actually pretty similar (With AB at it's best and D at it's worst)