The ESE ES-217 is a 4 output audio distribution amplifier. It is housed in a metal box measuring 4.7" x 3.7" x 2.2". The balanced inputs and outputs are made via the externally mounted terminal blocks.
The ES-217 is a transformerless design, which takes a single balanced or unbalanced input and creates four exact copies; each is a totally isolated and balanced output whose level is individually adjustable. If unbalanced outputs are desired, up to eight separate and isolated feeds can be made. The output levels are set via the four screwdriver adjustable pots on the unit's cover. An input attenuator is also provided, which is internally adjustable. This control has been set to maximum attenuation (-6 db), which will accommodate a house level of +8db. This provides a maximum overall gain of 12 db. When using lower input levels, it may be desirable to reduce the attenuation setting. This is accomplished by removing the four cover screws and pulling the cover, along with the PC board, off of the box. The attenuator pot (R7) shaft may then be adjusted.
An unbalanced input connection may be made by connecting the "hot" lead to the "+" input and the shield to the "-" input, jumpering the "-" input to the ground terminal. An unbalanced output may be taken from between one of the output terminals and ground. If option BNC is ordered, the "-" input is jumpered to ground and the outputs are taken from the "+" outputs.