SHOP All Products › Apantac OG-DA-AA-MB openGear Balanced Analog Audio Distribution Amplifier Image 1 of 1 Apantac OG-DA-AA-MB openGear Balanced Analog Audio Distribution Amplifier $839.00 openGear Balanced Analog Audio Distribution Amplifier.�1x8 Mono or 2x4 Stereo or 8x L+R (summed) mono output Add To Cart Added! openGear Balanced Analog Audio Distribution Amplifier.�1x8 Mono or 2x4 Stereo or 8x L+R (summed) mono output