UBBU 4 provides two stereo pairs of unbalanced-to-balanced conversion and two stereo pairs in the reverse direction. It is a practical interface for several RCA machines that need to share professional XLR inputs and outputs.

• Simultaneous RCA-to-XLR and XLR-to-RCA conversion in twin-stereo format.
• RF-filtered isolated RCA inputs and electronically balanced XLR outputs.
• Adjustable output gain and external +/-12 V DC input for backup power.