The DNA .5 = 125 and the DNA 1 = 225. The difference is basically wattage. The DNA .5 had better refinement than the 1, but I can't say the same goes for the 125 vs. the 225 (don't know).
Steve offers custom updates for the DNA .5 and DNA 1 amps. Apparently he has incorporated many of those upgrades as standard into the newer 125 and 225 amps, but he can't possibly put all of the boutique parts into them at those price points. He now offers custom updates for the 125 and 225 also.
If you don't need the extra power of the DNA 1, then the 125 gets you more. If you need the power then get the DNA 1. In either case I would suggest seriously considering Steve's upgrades - they make either of these into a world class amp.
Enjoy,
Bob
Steve offers custom updates for the DNA .5 and DNA 1 amps. Apparently he has incorporated many of those upgrades as standard into the newer 125 and 225 amps, but he can't possibly put all of the boutique parts into them at those price points. He now offers custom updates for the 125 and 225 also.
If you don't need the extra power of the DNA 1, then the 125 gets you more. If you need the power then get the DNA 1. In either case I would suggest seriously considering Steve's upgrades - they make either of these into a world class amp.
Enjoy,
Bob