Weather-Resistant Speaker Mount Box

I need a durable exterior box to hold a speaker bracket mount. The box will be used outdoors and should withstand occasional harsh weather conditions.

Requirements:
- Made of plastic (material choice is flexible, but should be weather-resistant)
- Should securely hold a speaker bracket mount
- Designed for outdoor use, so durability is key

Ideal Skills and Experience:
- Experience working with plastics
- Knowledge of outdoor durability requirements
- Ability to design secure mounting solutions

Please provide samples of similar work.