A metal Pioneer Electronic Crossover, Model SF-850 machine. The front of the machine is metal, silver with black type, with two rows of knobs. The top row has seven knobs. Each knob has a name as well as other markings to indicate levels. The names read from left to right: [Low Level / Low Pass / Low Cut / Mid Level / High Cut / High Pass / High Level]. Below the far left, top row knob, there is a power outlet. The bottom row has a switch, as well as four additional knobs. Above and below the bottom row knobs there are lines that form a grid. Black type, centered underneath the knobs, reads: [Slope (dB/oct)]. The Pioneer logo, in red type located at the bottom right of the front of the machine and is followed in black type by the name and model number. The back of the crossover is metal, black with white type, and inputs, outputs, caution labels, ac outlets, electronic wires, and a model plate. The back top left contains left and right inputs. Towards the center, top, there is a three way output for the left and right. There are also two caution labels, white background with black type, located on the back of the machine. The bottom of the back contains a model plate that reads: [Pioneer / Model SF-850 / 120 Volts 5 Watts AC 60 Hz]. Next to the plate are the AC outlets, followed by a fuse button and an electronic cord. The bottom of the machine has another caution label on it.