Based on the images provided, it looks like you have a subwoofer enclosure made by Collins. Given that they were known for producing various subwoofer models during the early to mid-90s, it's a bit challenging to pinpoint the exact model without more specific details (like dimensions, design features, or internal configuration).
The enclosure seems to have a ported design, which was popular in that era for enhancing bass response. If you can provide the dimensions and any additional features (like speaker type or any specific markings), that might help narrow it down further.
Feel free to share more details or ask if you have other specific questions about the installation or setup! Let's see if other members can also help out.