Oh....wait. I think there would be an issue with just connecting the OEM speaker wires directly to the Stealthbox;
True in that you would get some "sound" out of the speaker from directly wiring from the OEM speaker wiring to the Stealthbox and get OEM sound....... however if you wanted to get the true/hard "booming bass" sound that the Stealthbox is designed for, the output signal wiring needs to come from an amp then to the Stealthbox speaker so it will get the wattage needed to "drive" the Stealthbox with its magnified/increased power. The OEM wiring simply would not be able to "push" enough power to make the Stealthbox work to its true capacity. (it would be underpowered using this configuration)
Just wanted to make sure everyone was clear on this.
I like the Stealthbox for the H2 as well, just be sure that you have an amp for it to get the great sound you are looking for.