OA5 type 2 only plays upside down?

[chrismact]

Hello,

I'm new to the forum/cult and just got my first pair of OA5 type 2, a sonab homebuilt kit.

I have the strangest issue I can't figure out - one of the speakers only plays upside down. I checked the wiring and compared to the working speaker, and I can't find the issue. Around 90 degrees it cuts out, but works again when turned upside down once again.

This has me thinking it's a gravity issue, but all connections are clean and happy.

Anyone heard of an issue like this before?

Chris