Building a Reference Grade Listening Room

June 8, 2017 § Leave a comment

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” This HVAC system is a closed loop… the main air duct emerges from the fan/heat unit and goes through an electronic air purifier, then is separated into four outlet ducts… each of which travel to four different outlet vents on the ceiling. Each of the four outlet ducts has three 90 degree bends to reduce any fan noise. With four outlet ducts the velocity can be reduced. There are two cold air return vents located at the bottom of the front bass traps (these cold air return ducts act as part of the bass trap). These cold air returns are then ducted back to the heat/fan unit. With the door closed and no music playing the room is completely quiet… not a sound… when the HVAC unit comes on you can just barely tell it is on… any music or conversation makes it impossible to hear the HVAC.”


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