Hello,
I am purchasing the reSpeaker Flex XVF3800 Linear-4 with XIAO ESP32S3 and have a question about the FPC ribbon cable between the Linear-4 microphone array and the main XVF3800 board.
I understand the included cable is approximately 20 cm (8 inches), 24-pin, 0.5 mm pitch.
My installation would benefit from placing the microphone array on the front of a covered patio beam while keeping the XVF3800/XIAO electronics protected on the rear side of the beam. I may need approximately 30–40 cm (12–16 inches) of cable to do this cleanly.
Could you please tell me:
- Can a longer FPC cable safely be used between the Linear-4 microphone array and XVF3800 board?
- What is the maximum cable length Seeed has tested or recommends?
- Does Seeed sell or recommend a compatible longer cable?
- If I source my own cable, are there specific requirements beyond 24-pin / 0.5-mm pitch, such as contact orientation, conductor type, impedance, shielding, or other specifications?
- Would increasing the cable length to approximately 30–40 cm cause any potential problems with the microphone clock/data signals, signal integrity, interference, or reliability?
- Could a longer cable negatively affect any XVF3800 features such as beamforming, AEC, noise suppression, microphone synchronization, or far-field performance?
I would prefer to keep the microphone array exposed toward the listening area while placing the main electronics in a shaded, protected location, rather than enclosing the microphone array itself.
Thank you for any specifications or recommendations you can provide.
