The 117F4 is an audio distribution transformer designed for line matching. It features primary taps rated in watts to match speaker power levels and supports up to five power tap settings. The transformer allows coupling of 3.2, 8, or 16 ohm speakers to 25V or 70V line outputs of amplifiers. It has a frequency response ranging from 100Hz to 9kHz with less than 1.25% distortion at 100Hz at maximum power. The unit is mounted horizontally with a two-hole channel bracket (0.187-inch diameter) and offers options with solder lugs, making it suitable for slip-on jumper connections. Ideal for audio distribution applications.