NEXO GEOS12 GSTK – Ground Stack System

Ground-Based Greatness: Why the NEXO GEOS12 GSTK Ground Stack System Is a Game-Changer in Sound Deployment

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NEXO GEOS12 GSTK Ground Stack System

The NEXO GEOS12 GSTK Ground Stack System redefines how professionals deploy compact line arrays in situations where flying speakers is not practical or permitted. Designed specifically for use with the renowned GEO S12 Series, this rugged, road-ready system offers outstanding SPL, coverage control, and deployment speed in a ground-based configuration.

Whether you’re handling festivals, churches, corporate gigs, or mobile AV setups, this stackable solution delivers full-scale sound without the need for rigging infrastructure.

Shop and configure your GSTK system now at SASPhonik Shop

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What Is the GEO S12 GSTK System?

The GSTK (Ground Stack Kit) is a hardware and system design package that enables NEXO’s GEO S1210 and S1230 speakers to be safely and effectively stacked on subwoofers or dedicated base plates. It’s ideal for:

• Outdoor shows with stage roofs

• Indoor venues with no fly points

• Fast setup gigs needing consistent coverage

• Touring acts requiring repeatable and reliable rigging

With angle-adjustable brackets, the system maintains precise audience coverage from the ground up.

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System Components

A complete NEXO GEOS12 GSTK system typically includes:

• GEO S1210 and/or S1230 cabinets

• GSTK adjustable rigging base

• LS18 or RS18 subwoofers as stack foundation

• GSTK top clamp and tilt hardware

• M10 fittings and safety accessories

• Optional: NXAMP DSP amplification

You can scale the system based on venue size, number of cabinets, and bass needs.

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Top Benefits of the GEO S12 Ground Stack System

• Quick setup with no suspension required

• Flexible aiming of S12 modules with tilt angles up to 15°

• Stable stacking on LS or RS series subwoofers

• Ideal for festivals, gyms, temporary installs

• Retains full line array coupling and dispersion accuracy

• Tool-free alignment in many configurations

You get line array benefits—without the lift.

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Why Choose Ground Stack Over Flown Arrays?

Ground stacks are:

• Faster to deploy (especially with fewer crew)

• More cost-effective (no trussing or rigging gear)

• Safer in weather-prone environments

• Perfect for venues with height restrictions

• Easier to transport and reset between gigs

The NEXO GEO S12 with GSTK hardware ensures you don’t compromise on sound while avoiding the complexity of a full rigging system.

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Applications That Benefit Most

• Music festivals with rotating acts

• Conference centers or exhibition halls

• Pop-up events or outdoor ceremonies

• Churches and school auditoriums

• Mobile AV and event rental companies

• Broadcast stage sound with limited ceiling clearance

This system is a favorite for modular setups, regional AV crews, and event planners alike.

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Compatible Subwoofers for Stacking

• LS18 Subwoofer: Lightweight, punchy, standard base for stacking

• RS18 Subwoofer: Cardioid-capable, deeper bass, better for directional setups

• Dedicated GSTK plates available when no subwoofer base is needed

All options include secure mounting holes and anti-slip plates for safe and stable performance.

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DSP Amplification with NXAMP

Use NEXO’s NXAMP4x1 or 4×4 DSP amps for:

• Factory-loaded presets for S12 + subs + GSTK

• Correct crossover, time alignment, and protection

• Remote system monitoring and tuning with NeMo software

• Simple recall of scene presets for repeatable setups

Even in a ground stack, the GEO S12 system sounds fully optimized and perfectly aligned.

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How to Configure a Ground Stack Setup

1. Place RS18 or LS18 subwoofer on level ground

2. Attach GSTK base hardware

3. Mount S1210 or S1230 with angle-selected rigging bar

4. Secure safety cables and brackets

5. Power via NXAMP with correct preset

6. Test array coverage and tweak tilt if needed

Setup time: Often under 20 minutes with two techs.

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Audio Engineer Testimonials

“The GSTK setup is genius—perfect angles, no flying needed. We can go from trailer to stage in 25 minutes.”
— FOH Tech, Regional Tour Crew

“We use GEO S12 ground stacks in all our hotel ballroom gigs. Clients are shocked when they hear it.”
— Event AV Manager

“The flexibility is key—we use S1230s for front fill, then stack the rest for main arrays. Perfect solution.”
— Integrator, Worship Installations

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FAQs

Is the GSTK hardware sold separately?
Yes, you can buy just the ground stack kit if you already own S12 cabinets.

Can I mix S1210 and S1230 in a stack?
Absolutely. Use S1230 at the bottom for near field, and S1210 above for long throw.

Does the tilt angle lock in place?
Yes. The hardware includes secure pin locking with preset angle increments.

Can I use this system outdoors?
Yes, it’s road-ready and weather-resistant when paired with proper covers.

Is NXAMP required?
Not required, but strongly recommended for proper EQ, protection, and system coherence.

What’s the max stack height?
Usually 4–6 cabinets is ideal. Always follow rigging safety guidelines per NEXO specifications.

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The NEXO GEOS12 GSTK Ground Stack System is a tour-tough, event-smart solution for sound professionals who need flexibility without compromise. Whether you’re working in a ballroom, tent, outdoor stage, or multi-purpose venue, this setup delivers stunning audio clarity, powerful coverage, and quick deployment.

For events that demand speed, quality, and control—this is the stack that brings it all home.