I have read on line and it seems as though 16 ohm speakers can be safely used on 8 ohm outputs, though there may be a decrease in volume. Some of the larger bozaks used/use 16 ohm speakers. Were tube amps of the same time period always outfitted with 4, 8 and 16 ohm outputs, or did Rudy Bozak figure they would sound fine with 8 ohm outputs on a tube amp. Anyone with specific recommendations? Thanks Norm