This 2-inch diameter port tube is designed for DIY speaker cabinet builders and audio professionals replacing worn or damaged ports in existing PA speakers. The precision-molded plastic construction ensures consistent airflow and proper tuning for bass reflex cabinet designs.

The 4-inch length provides the ideal port tuning for most 12-inch and 15-inch PA speaker cabinets, helping optimize low-frequency response and reduce port noise. The flanged design creates a secure, professional installation that won't rattle loose during transport or high-output performances.

Key specifications include a 2-inch internal diameter, 1 7/8-inch cabinet cutout requirement, and 2 5/8-inch outer flange diameter for easy mounting. The black finish matches most professional PA cabinet aesthetics, while the durable plastic construction resists moisture and temperature changes that can affect wooden ports.

This port tube works well for building monitor wedges, DJ booth speakers, and small-to-medium PA cabinets designed for venues up to 200 people. It's also the go-to replacement part for refurbishing vintage speakers or repairing damaged cabinets where the original port has cracked or warped.

Installation requires only a hole saw or jigsaw to cut the 1 7/8-inch mounting hole, with the flange providing a clean finished appearance from the outside. The tube presses into place for a friction fit, though some builders add adhesive for permanent installation.

Backed by Seismic Audio's one-year warranty and available for immediate shipping, this port tube delivers the precision component you need for professional cabinet construction or repair.

Technical Specifications

Frequently Asked Questions

What size hole do I need to cut in my speaker cabinet for this port?

You'll need to cut a 1 7/8-inch diameter hole in your cabinet. The port tube is designed to press-fit into this opening, with the 2 5/8-inch flange providing a finished appearance on the outside of the cabinet. Use a hole saw or carefully cut with a jigsaw for the cleanest results.

Will this port work with 12-inch and 15-inch PA speakers?

Yes, the 4-inch length is optimized for most 12-inch and 15-inch PA speaker designs. This length provides proper port tuning for typical cabinet volumes in the 1.5 to 3 cubic foot range, helping extend low-frequency response while minimizing port noise at higher volumes.

How does this compare to using PVC pipe for a homemade port?

This molded port tube offers several advantages over PVC pipe: the flanged design creates a professional appearance, the smooth interior walls reduce turbulence and port noise, and the precise 2-inch internal diameter ensures consistent tuning. PVC fittings can create sharp edges that cause unwanted noise at high output levels.

Can I use this port tube for replacing damaged ports in existing speakers?

Absolutely. This is a common replacement part for repairing PA cabinets where the original port has cracked, warped, or been damaged. As long as your existing cabinet cutout is 1 7/8 inches (or can be enlarged to that size), this port will provide a direct replacement with improved durability.

What venues or applications work best with speakers using this port size?

Speakers built with this port tube are ideal for small to medium venues up to 200 people, including coffee shops, small clubs, church fellowship halls, and DJ booth monitors. The 4-inch port length provides good low-end extension without requiring the larger cabinet volumes needed for bigger venues.

WARNING: This product can expose you to chemicals including Di(2-ethylhexyl)phthalate (DEHP), which is known to the State of California to cause cancer. For more information, go to: www.P65Warnings.ca.gov