The SAJP311B blank jack plates are designed for sound engineers, venue installers, and DIY speaker builders who need to replace damaged connection panels or build custom PA cabinets from scratch. These steel plates provide the foundation for professional-grade speaker connectivity in any live sound application.

Each plate accommodates dual Speakon or XLR connections plus dual 1/4" inputs, giving you maximum flexibility for different signal routing needs. The Series D mounting pattern ensures compatibility with standard Neutrik and equivalent connectors, while the black metal construction matches most commercial PA cabinet aesthetics.

At 4.5" x 6.25" with a 3.375" x 5.125" cutout, these plates fit standard rectangular cabinet openings found on most PA speakers, floor monitors, and subwoofers. The dual connector layout supports both parallel and series wiring configurations, essential for daisy-chaining speakers or providing multiple input options.

Perfect for repairing damaged club installations, building custom church sound systems, or creating specialty monitor wedges for touring acts. Mobile DJs often keep spare plates for quick repairs between gigs, while cabinet builders use them for prototype designs before committing to expensive pre-wired alternatives.

These are blank plates only - you'll need to source your own Speakon, XLR, and 1/4" connectors separately. Each two-pack includes the steel plates with pre-cut mounting holes ready for your choice of professional connectors.

Seismic Audio backs these jack plates with a one-year warranty against manufacturing defects, with fast shipping to keep your builds on schedule.

Technical Specifications

Frequently Asked Questions

What connectors fit in the Series D mounting holes?

The Series D holes accommodate standard Neutrik Speakon connectors (NL4MP, NL8MP) and XLR connectors (NC3MD-LX, NC3FD-LX). These are the same mounting patterns used by major PA manufacturers, ensuring compatibility with professional-grade connectors from Neutrik, Switchcraft, and equivalent brands.

Can I use these plates for both passive and powered speakers?

Yes, these blank plates work for both passive and powered speaker cabinets. For passive speakers, you'll typically install Speakon input connectors, while powered speakers might use XLR inputs plus Speakon outputs for daisy-chaining. The dual 1/4" holes provide additional flexibility for parallel inputs or specialty applications.

What's the difference between buying blank plates versus pre-wired panels?

Blank plates give you complete control over connector types, wiring configuration, and component quality. You can choose high-end Neutrik connectors, custom wire gauges, and specific wiring schemes (parallel, series, or bridge-mono). Pre-wired panels are convenient but limit your options and typically use lower-cost components.

Will these fit my existing speaker cabinet cutout?

These plates require a 3.375" x 5.125" rectangular cutout. Measure your existing opening first - most commercial PA speakers use this standard size, but some manufacturers use proprietary dimensions. If your cutout is too small, you'll need to enlarge it; if too large, you'll need a mounting ring or larger plate.

Do I need special tools to install connectors in these plates?

You'll need a drill for any additional holes, a chassis punch or step drill for connector mounting (if modifying hole sizes), and basic soldering equipment for wiring. Most Speakon and XLR connectors require a 24mm (15/16") hole, which these plates provide. The 1/4" holes are standard 6.35mm size for most 1/4" jacks.

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