Usually 3-5 Days. 45 Day Lowest Price - 100% Satisfaction Guarantee. HR-2 Headphone Remote Stations are passive devices intended for use with the Furman HA-6A Headphone/Monitor Amplifier, to increase the number of headphone stations beyond the six provided. With the use of a simple adaptor, HR-2s may also be used successfully with any stereo power amplifier of 50 watts per channel or less to convert them to use as headphone distribution amplifiers. (The Furman SP-20A Half Rack 20 Watt/channel Power Amplifier has the required adaptor built in.) Each HR-2 box can accommodate two sets of headphones, each with its own volume control.