Yes you can pull out on pair of power tubes from the triple dropping it down to 100 watts from 150. You also have to pull a rectifier tube when you do this. Before I bought my triple I was reading in the users manual for the dual rectifier and it said you can do this to drop it to a single. But in the triple recs manual it did not say this so I called mesa boogie and they said "you can drop it down to the dual, but you cannot drop it down to a single that will mess with the impedance." My guess for the reason why it says you can drop the dual to the single but does not say you can drop the triple to the dual is because the triple is only a hundred dollars more and it can be 100 or 150 watts, which means it would be a waste of money to buy the dual when you can buy the triple and have the extra 50 watts if you need it.