Vigortronix 100v line transformers vigortronix vtx 106 506 708 this 100v 6 3 15 075 025w 4 8omega line transformer is part of a range from vigortronix ideal for use with paging and announcement equipment and can be combined with low level background music low frequency response is reduced at full power levels and it is recommended that low frequencies are attenuated at input or pre amp stage to improve clarity at lower power levelsthese transformers use high permeability low loss