One of the strong points of our miniDSP kits is their flexibility. Our products weren't designed for a fixed application, but rather with the ability to give DIYers as many options as we could. For those of you wishing to tweak/modify their miniDSP kit with a custom add on cards for balanced input/ouputs, two options are available:
- OPTION1: You could use a balanced in/out stage and connect them to the unbalanced input. It may not improve the SNR/DR but will at least allow you to interface to our kit at very low cost. (Cost of a transformer - Google balanced to unbalanced for more info on how to)
- OPTION2: You could also use an external ADC/DAC balanced in/out by interfacing them to the I2S bus on the expansion port. There aren't any guideline or template guides on which IC to use, but balanced in/out stages +ADC/DAC are fairly common information on the web. For more information about our I2S connectivity to our board, have a read at our I2S technical note first(http://www.minidsp.com/support/downloads ) to correctly understand how to interface with the board.