OSD Audio ISS4 4-Zone Speaker Selector with Impedance Protection

alaTest has collected and analyzed 28 user reviews of OSD Audio ISS4 4-Zone Speaker Selector with Impedance Protection from Amazon.com. The average user rating for this product is 3.9/5, compared to an average user rating of 4.2/5 for other products in the same category on Amazon.com. People are impressed by the price and usability. There are some mixed reviews about the design, and some have doubts about the reliability.