The Piano PIA-3 set extends the PIA-1 set for Double M/S. It adds two Lemo plugs for connection to the CCM 4 and CCM 8, and an in-line box which combines the three microphone cables internally and adapts them to an XLR-7 output.
The Piano PIA-3 set consists of:
| Output | XLR-7M |
| Length | 400 mm |
| Weight | 370 g |