That's funny that you disliked the head so much...since that's the head I use and always love the Alembic through it.
The head is all tube, and requires a 4-ohm or 2-ohm load, and I'm guessing the 410 cab was probably 8-ohms, so it probably was kind of anemic sounding.
You should have plugged into my amp when you were at the Gathering in Canyon to get a better reference for an Ampeg.
Ken (TEO)