Prowler573
5,000+ posts
R.I.P. Gossamer!!
You have three options.
1) Wire the existing sub to 4 ohms
2) Buy a new sub (get the Dual 4 ohm model)
3) Buy a new amp that is stable to 1 ohm
That's pretty much it little buddy.
Ding! Ding! Ding! We haaaaave a winner!
The possible upside to all this is that his amp will give him 500w @ 4 Ohms. While not nearly all that his 15" Solo will take shouldn't it still be enough to get it going decently until he can do something different? All in all 500w isn't peanuts, ya know...