that depends how they're configured, if there is one tube then max charge should be 4, discharge rate - 1, minimum firing charge - 3 and recharge, somewhere at 0.1-0.2, but if there are 4 tubes then max charge would be 1 as well as minimum firing charge - 1, so yeah 4 tubes are kind of waste on this one and there's bigger possibility that they won't fire when phasers are set to 100% efficiency ingame