DAS Audio EVENT-121A 21" Powered Subwoofer

Anchor your low end with the DAS Audio EVENT-121A

The DAS Audio EVENT-121A is a premium 21" powered subwoofer built to deliver arena-level low-frequency output with clarity, control, and cardioid-ready DSP. Designed as the low-frequency backbone of the EVENT series, it features a long-excursion 21FW4 transducer, driven by a 3200W peak Class D amplifier and controlled via rear-panel DAScontrol™ for seamless integration with top-box arrays like the EVENT-208A. Output peaks at 141 dB SPL, with defined response down to 30 Hz—ideal for flown, stacked, or end-fire subwoofer deployments.

This cabinet is engineered for real-world conditions where precision matters: festival stages, club installs, and mobile systems that demand throw distance, phase consistency, and compact rigging. Its internal DSP includes cardioid configuration presets, FIR filtering, and delay alignment—making it easy to deploy in arrays of 2–6 subs with polarity optimization and axial control. Whether you're ground-stacking behind a DJ booth or flying the system for a corporate rig, the EVENT-121A gives you low-end reinforcement that hits with purpose—and lands clean.

Extended-output design, optimized for the EVENT series

• 21FW4 transducer: Long-excursion 21" woofer rated for high-displacement LF performance with heat-resistant voice coil and large-format ferrite magnet.
• Integrated 3200W Class D amplifier: Onboard power platform with auto-ranging power supply, limiter protection, and matched transducer loading.
• 141 dB peak SPL: Delivers massive output for indoor or outdoor systems with low distortion and consistent tonal integrity.
• FIR-filtered crossover logic: Internal DSP ensures linear phase behavior and tight integration with mid-high cabinets like the EVENT-208A or EVENT-210A.

Infrastructure and system alignment

• DAScontrol™ interface: Back-panel DSP management with cardioid presets, polarity control, system delay, and input gain matching.
• M20 pole mount: Centered mounting insert supports top-box configurations in standalone or ground-stacked arrangements.
• Birch plywood enclosure: ISO-flex finished cabinet with touring-grade hardware, dual handles, and front steel grille protection.
• Rigging-ready frame points: Supports arrayed or fixed installations using official DAS frames or horizontal truck-pack alignment.

Real-world applications and sound roles

The EVENT-121A excels in sub-heavy configurations where response, pattern control, and speed matter. Deploy it as a cardioid array for outdoor noise compliance, fly it behind an EVENT-208A cluster for clean vertical alignment, or stack it for high-pressure DJ and rental gigs. Its DSP, power section, and enclosure design combine to deliver intentional, repeatable subwoofer performance—without racks, guesswork, or excessive tuning time.

Where the EVENT-121A excels

• Cardioid subwoofer arrays: Purpose-built for directional deployment using rear-panel DSP presets and polarity control, enabling tighter low-frequency coverage and reduced stage bleed.
• Large-scale DJ events: With 141 dB peak SPL and a 21" LF driver, it delivers explosive bass that holds together under high-output electronic, hip-hop, and festival-grade formats.
• Line array system foundations: Integrates seamlessly beneath EVENT-208A or EVENT-210A clusters, offering phase-consistent voicing curves and delay alignment via DAScontrol™.
• Touring and rental companies: Fast deployment tools, pole mounts, and stacking hardware make this sub a high-ROI solution for fly dates, dry-hire packages, or full production kits.
• Permanent installs with SPL demands: Ideal for nightclubs, worship venues, and arena-level sound systems where extended bass and cardioid output are mission-critical.

Accessory Spotlight for the DAS Audio EVENT-121A

• DAS Audio FUN-2-EV121 Protective Transport Cover — Designed to shield one or two stacked EVENT-121A subwoofers during transport or storage. Reinforced stitching, ventilation mesh, and side handle access for quick on-site deployment.
• DAS Audio PL-EV121S Transport Dolly — Road-ready dolly engineered for up to two EVENT-121A subwoofers. Heavy-duty casters and reinforced frame ensure smooth handling during load-in and load-out cycles.

Control modes of the EVENT-121A powered subwoofer

The EVENT-121A uses the rear-panel DAScontrol™ DSP interface to configure real-world deployment modes with zero external software. This intuitive system provides access to cardioid array presets, time alignment, polarity inversion, and high-pass filtering—allowing sub arrays to be tuned on-site within minutes.

The rotary encoder and LCD screen let engineers set subwoofer behavior based on physical layout: end-fire, inline, gradient, or standalone. Cardioid presets account for spacing and box count, while delay can be dialed in to match flown or staggered arrays. When paired with EVENT-series tops, all voicing is internally matched—no rack DSP required. The interface also supports:

• Cardioid array presets: Optimized polarity and delay behavior for 2-box and 3-box subwoofer clusters.
• High-pass filtering: Adjustable filters to prevent over-extension when used alongside larger EVENT-218A or 221A subs.
• Delay and polarity alignment: Precision tuning to match flown tops, sub placement, or asymmetrical stage geometry.
• Input gain and loop-thru: Signal flow control with rear XLR input/output for multi-sub linking.
• Thermal and limiter protection: Onboard voltage scaling and thermal rollback built into DSP architecture.

Whether deployed solo or in cardioid clusters, the EVENT-121A’s control scheme allows fast, predictable setup with no-compromise acoustic control.

How to deploy the EVENT-121A in the field

The EVENT-121A is built for fast, controlled subwoofer deployment in cardioid stacks, traditional ground stacks, or fixed installs. Whether used in multiples or standalone, it offers the rigging logic and DSP behavior needed for predictable, repeatable low-end performance.

When deployed in cardioid mode, users can position two or three EVENT-121A units with rear-facing cabinets set to polarity-inverted and delayed settings via DAScontrol™. Factory presets simplify this setup, aligning output cancellation behind the array while reinforcing it forward. This configuration is ideal for outdoor shows, worship stages, and club installs where rear SPL must be minimized.

Ground-stacked setups are straightforward: each unit includes an M20 pole mount for deploying EVENT-208A or EVENT-210A tops. For club installs or mobile DJ systems, a 2-up stack can be used to anchor full-range top boxes while raising vertical pattern control. Stacks can also be deployed in end-fire mode for increased forward directivity, tuned via the onboard delay settings.

Signal is looped through the rear XLR input/output chain, and onboard gain staging ensures consistent signal flow across linked units. Internal FIR filtering and factory voicing maintain sonic character and phase integrity even in complex sub-top configurations. With no external rack DSP required, system tuning is fast—even solo.

The cabinet’s rigging-ready frame points allow for permanent mounting with official DAS accessories or secure placement in truck-pack layouts for touring. Wherever it's deployed, the EVENT-121A enables focused low-end delivery with field-proven tuning tools and structural confidence.

Amplifier architecture of the EVENT-121A

The EVENT-121A uses a high-efficiency Class D amplifier platform engineered for extended headroom and thermal reliability in demanding applications. Rated at 3200W peak power, this single-channel design is optimized to drive the massive DAS 21FW4 21" low-frequency driver with precise voltage control and dynamic scaling. The amplifier section is fully integrated with the sub’s internal DSP to maintain consistent performance across presets and deployment modes—even during prolonged high-SPL output.

A switch-mode power supply (SMPS) enables global operation from 100–240V AC and delivers stable current under load, whether in a fixed install or generator-powered outdoor stage. The power module is convection-cooled via rear-panel heat sink—there are no fans inside, which minimizes acoustic noise and reduces long-term maintenance requirements. Protection circuits include signal peak limiting, thermal rollback, short-circuit response, and voltage guardrails—each governed by the DSP engine, not crude limiter clamping.

The amplifier is housed in an isolated rear compartment for thermal separation, and its signal path is tuned for low noise, fast response time, and consistent behavior across varying cabinet conditions. Input sensitivity is preset for seamless integration with DAS EVENT-series tops and control units, ensuring that gain staging remains consistent whether the unit is flown, stacked, or part of a multi-sub array.

Digital signal processing in the EVENT-121A

The EVENT-121A features an internal high-resolution DSP engine designed to control crossover behavior, delay alignment, output filtering, polarity settings, and thermal protection without the need for external processors. All DSP functions are accessed through the rear-panel DAScontrol™ interface, which includes an LCD screen and rotary encoder for field-ready configuration.

Core to its signal flow is a set of factory-programmed FIR filters that preserve linear phase response across the sub’s operating range. These filters ensure clean integration with tops like the EVENT-208A or EVENT-210A by minimizing phase distortion at the crossover point and maintaining time coherence in the system’s low-mid handoff. The DSP also provides delay adjustment in precise millisecond increments, enabling accurate alignment between subs and tops in stacked, flown, or cardioid configurations.

Additional tools include polarity inversion, cardioid mode presets (with preconfigured delay and gain compensation), and adjustable input gain. The system's limiter behavior is governed by the DSP logic, allowing for controlled peak reduction without flattening the transient response—critical for preserving punch and clarity in bass-heavy content.

Every DSP setting is stored onboard and retained between power cycles. This allows users to configure arrays offsite, transport the system, and deploy it with confidence that settings will remain intact without external control software or networked hardware.

Expanded Processing: DAS Audio INTEGRAL-M26X

The DAS Audio INTEGRAL-M26X is a rackmount 2-in/6-out digital signal processor that extends control and optimization for any DAS Audio system. Designed for both fixed installs and touring applications, it offers unmatched signal routing, alignment, and remote control across complex deployments.

• ALMA™ Control: Full networked control via PC/Mac and mobile apps using DAS Audio's ALMA software.
• FIR-Capable Filtering: Linear-phase crossover control with 48 dB/oct options and preset libraries for EVENT, ARA, VANTEC, and more.
• Install-Ready I/O: Balanced XLR connections, GPIO triggers, and support for OSC and RS-232 protocols.

Every INTEGRAL-M26X deployment is backed by DAS's official preset libraries—ensuring phase-coherent, FIR-tuned results across EVENT and VANTEC systems.

Recommended Pairings for the DAS Audio EVENT-121A

• Pioneer DJ OPUS-QUAD All-in-One Standalone System — High-resolution playback and four-deck control with zone output capabilities make this the ideal centerpiece for driving the EVENT-121A in high-capacity venues or multi-room events.
• DAS Audio ALTEA-712A Powered Speaker — Use as top cabinets in tandem with the EVENT-121A for powerful full-range systems. High SPL with clarity and seamless crossover balance for FOH applications.
• DAS Audio AXF-X12 Bracket for 12 inch VANTEC, ALTEA Speakers — Rig your 12 inch DAS speaker from ceiling or truss with the AXF-X12. Black-finish, install-ready bracket with locking tilt, compatible with VANTEC, ALTEA, and ACTION-500 series.
• Pig Hog PHM100 100-Foot XLR Cable — Long-distance XLR routing solution for sending signal to rear-stage EVENT-121A stacks. Heavy-gauge shielding, stage-rated jacket, and reinforced ends for touring environments.
• Chauvet DJ Intimidator Spot 110 — Lightweight LED moving heads for stage wash or dance floor highlight near EVENT sub stacks. Compact and efficient for mobile rigs or permanent installs.
• ProX XCP-DMX50 50-Foot DMX Cable — DMX signal line for lighting systems used alongside EVENT-121A setups. Flame-retardant, tour-grade build with 3-pin XLR heads for universal compatibility.
• Chauvet DJ Obey 70 DMX Controller — Full-featured lighting control desk for managing fixtures around the EVENT-121A. Supports 384 channels, 30 banks of scenes, fog trigger, and MIDI compatibility.

Why choose the EVENT-121A from AVMaxx?

AVMaxx isn’t just a supplier—we’re your deployment partner. When you choose the EVENT-121A from us, you gain access to real-world experience from professionals who’ve deployed DAS systems in concert venues, touring rigs, and installed AV environments. We don’t sell boxes—we design outcomes. That means cardioid array advice, preset pairing guidance, and system design support tailored to your workflow.

Our team understands how the EVENT-121A behaves in the field: from delay alignment and gain structure to pole-mount applications and horizontal sub arrays. We’ll help you scale from one sub to six—while maintaining phase accuracy and consistent low-end punch. And because we stock the accessories, cables, and rigging frames to match, we can outfit your entire rig from delivery to deployment.

Whether you’re a mobile DJ scaling up, an AV integrator building a fixed install, or a rental house expanding your fleet—AVMaxx ensures your EVENT-121A system delivers the performance, protection, and support you need to get the job done right the first time.

From high-output club installs to field-tuned cardioid arrays, the EVENT-121A gives you real-world subwoofer control, scalable power, and AVMaxx support to match.