Why does Ampeg use eight 10" speakers? Because they learned early on that 10" speakers work much more efficiently than fifteens or eighteensâ??and if you put eight 10" speakers together, you can move a much larger column of air. In fact, you'd need five 18" or six 15" speakers to move as much air as the SVT-810AV! And they simply wouldn't be able to respond to transient peaks as quickly as Ampeg's tens. The SVT-810AV is still manufactured using the same design dating all the way back to 1969. The Infinite Baffle design of these sealed enclosures produces vast amounts of tightly focused bass..