Nope won’t matter. Usually it’s nicer looking wiring wise to wire the individual subs each in series, then wire the two subs together in parallel to the amp.

It’s not recommended to mix impedances like that. It’ll cause some weird issues with one sub getting more power than the others. Best to get all matching subs if you’re running them on one amp

Can I hook up two 1 old svc to a dvc2 olm with a .5 stable amp

For two 4 ohm subs or a dual 4 ohm sub, yes

Sorry for the late response. Just saw your comment.

Are all 4 subs in the same box? If they are in separate boxes, the issue he talks about in the video won’t be as much of a problem.

I was going to say to strap the amps, but saw the part of the video where he did that with his amps and they weren’t playing the same. Even then, strapping the amps would be the easiest method. And you could give it a shot to see how it sounds.

But after watching the whole video, that’s a really interesting method. Thanks for sharing. It may come in handy one day.

As far as wiring goes for his method, I’ll try my best to explain it. He used 4 ohm DVC subs which made it a little easier. If you wire it how he showed, each amp would see 0.25 ohms and not be happy.

So each sub has 2 voice coils. Lets call them VC1 and VC2. And call the amps amp1 and amp2. And subs s1, s2, s3, s4.

Wire VC1+ on s1 to VC1- on s2, then run a wire from there to amp1+.
Wire VC1- on s1 to VC1+ on s2, then run a wire from there to amp1-.

Repeat this for s3 and s4.

Then repeat all of that again for amp2.

Hopefully that makes sense, but still use a multimeter to see what the final ohm load would be at each amp.

I’ll draw a picture later when I have time and send you an email.

Then just go through the video’s method of gain and phase matching.

It’s not recommended to mix subs with different impedances. I would run either the 2 4ohm dvc together on the amp at 1 ohm or just the single 4 ohm for now and sell the other(s) and buy another matching one if you want to use more than 2