These transformers are for 100V line matching; they are not suitable for other output matching situations. 100V Line Transformer. These 100V line transformers are brought to your by OEP, and are designed to match loudspeakers to the 100V line output of PA amplifiers. The OEP range of 100V Line Transformers includes the following products:. 210-6497 210-6497 is a 2W Line Transformer for 8 speakers. 210-6504 210-6504 is a 5W Line Transformer for 8 speaker. 210-6526 210-6526 is a 10W Line Transformer for 8 speaker. 210-6532 210-6532 is a universal type suitable for 4, 8 or 16 speakers and provided with taps to deliver 1, 2, 5, 15 or 30W.