The SAJP311B blank jack plate provides a professional foundation for custom PA speaker builds and cabinet repairs. Whether you're building a monitor from scratch or replacing a damaged input panel on your existing rig, this steel plate delivers the clean, standardized connector layout that live sound applications demand.

This 4.5" x 6.25" steel plate features dual Series D mounting holes sized for Speakon or XLR connectors, plus dual 1/4" connector holes. The black metal construction matches professional cabinet aesthetics while providing the structural integrity needed for frequent cable connections and disconnections. The 3 3/8" x 5 1/8" cutout size fits standard rectangular cabinet openings.

The Series D hole pattern accommodates most professional Neutrik Speakon connectors and standard XLR jacks, giving you flexibility in your build design. The dual 1/4" holes support combo jacks or separate input/output configurations. This layout works particularly well for floor monitors, side fills, and smaller PA cabinets where you need both high-current speaker connections and line-level inputs.

Cabinet builders use these plates for everything from church monitor systems to DJ booth speakers. Mobile performers keep spares for emergency repairs, since a damaged jack plate can sideline a speaker for weeks. The plate works with most connector types, so you can match your existing cable inventory.

Installation requires basic tools and standard connectors (sold separately). Each plate comes with pre-punched mounting holes for secure cabinet installation. Seismic Audio backs the SAJP311B with a one-year warranty and ships nationwide.

Technical Specifications

Frequently Asked Questions

What connectors fit the Series D holes on this jack plate?

The dual Series D holes accommodate Neutrik Speakon connectors (NL4, NL2) and standard 3-pin XLR jacks. This gives you flexibility to wire for either high-current speaker connections or balanced line inputs. The holes are the industry-standard "D" size used in most professional audio applications.

Can I use this plate for both input and output connections?

Yes, the dual connector layout works well for input/output or input/link configurations. Many builders use one Speakon for the main input and the second for a parallel output to chain multiple speakers. The 1/4" jacks can handle line-level signals or serve as backup connections.

What tools do I need to install connectors in this plate?

You'll need the connectors themselves (sold separately), basic hand tools for mounting the connectors to the plate, and wood screws to secure the plate to your cabinet. Most Neutrik connectors use a simple twist-lock mounting system that requires no special tools.

Is this plate compatible with powered speaker cabinets?

This blank plate works for both passive and powered speaker applications. For powered speakers, you might wire the connectors to an internal crossover or amplifier module. For passive speakers, the connections typically go directly to the drivers or an internal passive crossover network.

How do I determine if this plate will fit my existing cabinet cutout?

Measure your current cutout and compare it to the 3 3/8" x 5 1/8" dimensions listed. If your cutout is smaller, you'll need to enlarge it. If it's larger, you may need a mounting ring or different plate size. Most standard rectangular PA cabinet cutouts accommodate this size.

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