AC/DC Regulated switching power supply 600 Ma

Has variable voltage control of 3v, 4.5v, 5v, 6v, 7.5v, 9v, 12v

This can be used to power up to 2 exhaust fans (ADC-FAN3.5-.17A).
This power supply (ADC-UNI-600MA) is recommended when you are not sure about how fast you may want to run the exhaust fan.  This will allow you to variably switch the speed of the fan as needed.
Because it is a switching power supply the cooling fans will run quieter.

When trying to plug directly to the switched outlet of a receiver use a 6 inch extension cord (ADC-EXTCRD)