Why are the speakers hanging on both sides of the stage at large concerts shaped like a J?
Because they are line arrays, composed of multiple vertical hanging line array speakers, each with a structure that allows for angle adjustment between speaker cabinets. For a set of hanging line arrays, by reducing the angle between the cabinets at the top, the sound energy can be focused on specific distant audience areas, thereby increasing the sound pressure level at a distance. This is similar to how multiple spotlight beams can be gathered together to increase the brightness of the illuminated area. Conversely, increasing the angle between the cabinets at the bottom of the line array can reduce the sound pressure level near the stage, ensuring that the energy is evenly distributed across the entire audience area. This is the design principle of line arrays. Therefore, in most cases, the curvature of the line array increases from top to bottom, eventually taking on the shape of a J.
The J-Shaped Mystery: The Science Behind Line Array Speakers at Concerts
When you attend a large concert, one of the first things you might notice are the massive speakers hanging on either side of the stage, often in a distinctive J-shape. But have you ever wondered why these speakers are designed this way? The answer lies in the science of sound and the innovative technology of line array speakers.
What Are Line Array Speakers?
Line array speakers are a type of loudspeaker system that uses multiple speakers, or drivers, arranged in a vertical column. These speakers are designed to provide a more controlled and focused sound projection, which is crucial for large events where sound needs to reach every corner of the venue.
The J-Shape: A Design for Sound
The J-shape of these speakers is not just an aesthetic choice; it's a result of the principles of acoustics and the way sound waves travel. Here's how it works:
1. Vertical Angle Control: Each speaker in the line array can be individually angled. This allows for precise control over the direction and spread of the sound. By adjusting the angles between the speakers, sound engineers can direct the sound energy to specific areas of the audience.
2. Focusing Sound Energy: By decreasing the angle between the speakers at the top of the array, the sound energy is focused towards the distant parts of the audience. This is similar to how a spotlight can be focused to illuminate a specific area more brightly. This technique increases the sound pressure level at a distance, ensuring that even those at the back of the venue can enjoy clear and powerful sound.
3. Even Sound Distribution: Conversely, by increasing the angle between the speakers at the bottom of the array, the sound pressure level near the stage can be reduced. This helps to distribute the sound energy more evenly across the entire audience area, preventing sound overload near the stage while ensuring that everyone gets a balanced audio experience.
4. The J-Shape Formation: As the array goes from top to bottom, the curvature increases, which is why it takes on the J-shape. This shape allows for a more gradual change in the sound projection, ensuring that the sound is distributed in a way that is both efficient and effective.
The Benefits of Line Array Speakers
The use of line array speakers in concert settings offers several advantages:
- Improved Sound Clarity: By controlling the directionality of sound, line arrays help to reduce sound reflections and echoes, which can muddy the audio experience.
- Consistent Audio Experience: Regardless of where you are in the venue, line arrays aim to provide a consistent sound level and quality.
- Energy Efficiency: By focusing sound where it's needed, line arrays can be more energy-efficient, using less power to achieve the desired sound levels.
- Versatility: Line arrays can be adapted to various venue sizes and shapes, making them a flexible solution for sound reinforcement.
Conclusion
The next time you find yourself at a concert, take a moment to appreciate the J-shaped line array speakers. They're not just there for show; they're a testament to the science and technology that make it possible for you to enjoy every note of your favorite artist's performance. So, the J-shape is more than just a design—it's a carefully crafted solution to the challenges of sound projection in large spaces. It's the unsung hero of the concert experience, ensuring that the music reaches your ears with the clarity and power it deserves.
This 6m Transparent Heavy Duty Geodesic Glamping Dome Tent for Outdoor Event Party Wedding Camping from China manufacturer - DRAGON STAGE is perfect for an outdoor event or wedding. The transparent dome tent features a geodesic design that allows for natural light to shine through and includes six doors and two large windows. This geodesic dome tent is made of durable, lightweight, waterproof polyester fabric with PVC coating. The tent includes an inside floor and heavy duty zipper. This geodesic dome tent is perfect for any outdoor event or wedding.
there are 2 kinds of Aluminum Quik Stage Portable Fixed Height Legs, round and square shape for the legs.
DragonStage Aluminum Quick Stage Adjustable Legs are telescopic replacement and configuration legs designed for compatible Quick Stage platforms.
Available in both round and square tube versions, with four adjustable height ranges from 0.2–0.3m up to 1.0–1.5m, these legs allow the same modular stage system to be configured for different finished platform heights. The adjustable foot design also helps accommodate minor floor-level differences and sloping installation surfaces
The AT4130 and AT2600 Professional Touring Power Amplifier Series are high-power T-D class amplifiers designed for HL line array speakers and subwoofer systems. Featuring large-capacity regulated power supplies, high output power and excellent damping control for concerts, bars and professional entertainment venues.
this is a Custom Triangle Dj Stand Trussing, the shape is a big A with a folding book corner on the top and bases.
The Custom Triangle DJ Stand Trussing is a unique and innovative piece of equipment designed specifically for DJs and performers who are looking to elevate their stage presence and enhance their overall performance.
The DragonStage 11x6x7m Covered Concert Roof Truss System combines an 11m-wide × 6m-deep × 7m-high main stage roof with two 2m side PA speaker wings.
The illustrated configuration features a pitched aluminum roof framework with a blue roof canopy, four main support towers, two independent speaker towers, and a matching modular stage platform with guardrails and dual stair access.
Designed for concerts, festivals, live performances, community events, and temporary outdoor productions requiring a coordinated stage roof and separate speaker-support positions.
The DragonStage 10x5x7m Aluminum Pitched Roof Truss System is a modular concert-stage structure featuring a 10m-wide × 5m-deep × 7m-high main roof frame with 2m side speaker wings on both sides.
The configuration combines a pitched aluminum roof-truss framework, four main support towers, two additional side speaker towers, and a matching modular stage platform as illustrated. It is designed for concerts, festivals, live performances, community events, and temporary stage productions requiring separate side positions for line-array or PA equipment.
The DragonStage 32x24x18m Large Ringlock Scaffold Roof Truss Structure combines a large modular Ringlock support system with a heavy-duty aluminum pitched-roof truss framework.
Designed for stadium-scale ceremonies, festivals, cultural performances and large outdoor event productions, the system integrates extensive scaffold support zones, heavy aluminum roof trusses, custom roof connectors, tensioning components and a large roof canopy.
The drawing identifies a nominal 32m × 24m × 18m configuration, with the overall height shown at approximately 18.21m.
A complete professional event sound package combining 16 dual-12-inch passive line array speakers, 10 dual-18-inch subwoofers, 6 stage monitors, dedicated Class-D power amplifiers, dual 4-in/8-out DSP processors, power management, wireless microphones, rigging frames, flight cases, amplifier racks and cabling.
This system is designed for concerts, live performances, festivals, touring productions and other professional event sound applications where the customer needs a coordinated PA package rather than individual speakers.
For other professional audio systems, see Stage Sound.
The DragonStage 15×10×8m Aluminum Curved Roof Truss System is a modular concert-stage roofing structure featuring a curved overhead truss framework, four main support towers, and two additional side-wing towers.
The system uses CS389×389mm and CS289×289mm aluminum spigot truss, sleeve block assemblies, BA05 manual hoists, tower bases, outriggers, and a PVC roof canopy. The side wings extend the configuration for additional event-production arrangements, subject to the final equipment layout and verified loading requirements.
Designed for concerts, music festivals, touring productions, and temporary entertainment stages, this system can be supplied with matching modular stage platforms and accessories.
Custom Star Shape Truss Aluminum for Wedding Decoration Art Design
Pentagram，five-pointed star
The DragonStage Custom Five-Point Star Aluminum Truss is a decorative event structure designed for wedding backdrops, stage displays, photo areas, exhibition decoration, and artistic event installations.
Featuring a distinctive pentagram-style star shape, the product is available in 2.5×2.63m, 3×3.15m, and 4×3.8m configurations, with selected 200mm and 300mm truss section options.
The customized star geometry provides an alternative to conventional square, rectangular, or circular event truss structures.
The DragonStage 9x6m Bolt Truss Gantry System is a modular event-support structure featuring two vertical truss towers, a horizontal bolt-connected truss beam, tower-head assemblies, base plates, and diagonal outrigger bracing.
With a nominal horizontal dimension of 9m (29.5ft) and a height of 6m (19.7ft), this open-frame structure is intended for event lighting, stage production, backdrop framing, and temporary gantry applications. Final truss specifications, support arrangements, and equipment loads are confirmed according to the project requirements.
The DragonStage 36x18x12m Large Concert Stage Roof Truss System is a large-format modular event structure featuring a multi-tower truss support system, an elevated overhead truss framework, and a modular stage platform with guardrails and stair access.
With nominal dimensions of 36m wide × 18m deep × 12m high (120ft × 60ft × 40ft), this configuration is intended for large concerts, music festivals, live performances, and temporary entertainment productions requiring an extensive stage area and overhead structural framework.
The DragonStage 6.72x4.89m modular event stage combines a 0.6m-high red stage platform with a 7.7m-wide, 4.4m-high rear box truss gantry. The open-top configuration provides a raised performance area and a separate overhead truss frame for event backdrop and production applications. Suitable for concerts, school performances, ceremonies, and indoor events, with final accessories and rigging requirements confirmed according to the project.
The DragonStage 25x10m Ringlock Grandstand is a large modular spectator-seating system designed for temporary sports events, school competitions, festivals, public performances, and other audience gatherings. Measuring 25m wide × 10m deep, the illustrated configuration features tiered seating, two access aisles, and three-sided guardrails. The specified main height is 2.5m, with an overall height of 3.5m. The modular Ringlock system can be configured according to the required seating layout, access arrangement, and project conditions.
A heavy duty iron adjustable clamp specifically designed for use in clear span marquees using grooved aluminium kader style beams. It has M10, M12 and M14 tapped mounting points.
Our professional Aluminum Alloy Spigot Square Truss is the industry standard for high-performance rigging. Designed with a robust modular system logic, this versatile solution is perfect for concert and event stages. It offers exceptional load-bearing stability and a sleek finish for supporting professional lighting and LED screens.
Section:Square200x200mm inclined tube: 12x2.0mm Main tube: 30x2.0mm Length:0.5/1/2/2.5m Braces: 20x2.0mm
This premium 200x200mm Aluminum Spigot Box Truss offers a compact yet incredibly strong structural solution. Ideal for exhibitions and trade shows, its high-precision conical connection system ensures rapid assembly. It is the perfect professional choice for creating sophisticated lighting truss grids in any concert and event stage environment.
Our 290mm Aluminum Square Spigot Truss with 50x3mm main tubing is a heavy-duty solution for professional rigging. Utilizing a modular system logic, this versatile series is ideal for concert and event stages, offering exceptional load-bearing stability and rapid assembly for any production environment.
The Dragonstage Aluminum Spigot 520x520mm Square Box 6 Ways Corner Truss Cube Connector is a device for constructing large, sturdy structures that are sturdy and lightweight. This device is made of aluminum, which is durable and lightweight. The product has a size of 520x520mm and can be used for building structures in 6 different ways. It also comes with two pieces of aluminum screws for assembling the structure. The device is able to withstand high pressure, so it is perfect for heavy objects.
This box can be used to create a stable structure for your display or party. You can use this box to create a corner truss cube. It can be used for exhibitions, retail, and party displays. The box has a 400x400mm or 389x389mm square opening. The box has six ways to connect.
Dragonstage Aluminum Spigot 300x300mm / 289x289mm Square Box 6 Ways Corner Truss Cube Connector is an aluminum spigot with a 300x300mm square box with 6 ways corner truss cube connector. This aluminum spigot is perfect for hanging lights, air conditioning, and other things. The dimensions of the spigot are 300x300mm square box with 6 ways corner truss cube connector.
Aluminum Spigot Truss Aluminum Base Plate with Handles 300mm 400mm 500mm 600mm 800mm with half conical and pins clips.
The DragonStage Aluminum Spigot Truss Base Plate with Handles is available in five square sizes from 300×300mm to 800×800mm, all using an 8mm-thick aluminum plate. Each configuration can be supplied with compatible half conical connectors, connector pins and R-clips for spigot truss installation. Integrated handles make the plates more practical to carry and position during repeated event setup and teardown.
this is 100x100x3mm base plate for f14 truss mini, with 4 half connectors and pins clips.
The DragonStage F14 Mini Truss Square Base Plate is a compact 100 × 100 × 3mm base plate supplied with 4 half conical connectors, connector pins and R-clips for compatible F14 mini truss systems. It is designed as a small mounting and connection accessory for exhibition, display, DJ, decorative and lightweight mini-truss applications.
Section:Square400x500mm Inclined tube: 25x2.0mm Main tube:50x3.0mm Braces:50x2.0mm Material: Aluminum 6061-T6
Our high-strength 500x400mm lighting truss is engineered from premium aluminum alloy for superior load-bearing performance. Ideal for music and audio setups, this durable screw-connection system ensures stability for professional stage environments. Built to meet rigorous safety standards, it provides a reliable foundation for any event production.
Section:Square500x500mm Inclined tube: 25x2.0mm Main tube:50x3.0mm Braces:50x2.0mm Material: Aluminum 6061-T6 This heavy-duty 500x500mm bolt aluminum square truss is the ultimate foundation for outdoor concert stages and large-scale events. Engineered for maximum structural stability, this aluminum truss system provides the high-load capacity needed to support massive lighting rigs and heavy audio arrays safely in any environment.
Section:Square400x400mm Inclined tube: 25x2.0mm Main tube:50x3.0mm Braces:50x2.0mm Material: Aluminum 6061-T6
This versatile 400x400mm aluminum roof screw lighting truss is the industry standard for medium-to-heavy stage rigging. Engineered for exceptional durability, this high-performance aluminum truss system supports heavy lighting and audio equipment with ease. It is the perfect foundation for building safe, professional modular stage systems for any event.
The DragonStage 4.88x2.44m Adjustable Outdoor Event Stage is a compact 16x8ft temporary platform with two access stairs and an adjustable height of 0.6–1.0m. It is designed for community events, ceremonies, school performances, church activities, DJ shows, presentations, and other temporary indoor or outdoor applications where a medium-size stage with flexible access is required.
Park Aluminum Portable Square Stage 8.54x6.1m 28x20ft Height: 0.8-1m
The DragonStage 8.54x6.1m Aluminum Park & Community Event Stage is a 28x20ft brace-supported modular platform built from 35 standard 4x4ft stage decks. The complete configuration includes 18mm anti-slip plywood decking, adjustable support stands, three-side guardrails, a 4-step stair, and black stage skirting, making it suitable for community concerts, park events, ceremonies, public performances, school activities, and temporary outdoor stages.
The Concert Custom Adjustable Portable Stage is the perfect addition to any concert venue. The Concert Custom Adjustable Cheap Portable Stage is a portable stage that is lightweight and easy to set up. It can be adjusted to the height of the performer and is available in two different colors. The Concert Custom Adjustable Cheap Portable Stage is made of durable, lightweight aluminum that will last for years to come. It has a black aluminum top with four black steel legs. The Concert Custom Adjustable Cheap Portable Stage is very easy to set up and is very stable.
Aluminum Mini Modular Stage Panel Flooring Systems 2.44x2.44m 8x8ft Height 0.6-1m with 1 stair.
The DragonStage 2.44x2.44m Adjustable Aluminum Modular Stage is a compact 8x8ft brace-supported event platform built from two standard 4x8ft / 1.22x2.44m wooden-topped stage panels. With an adjustable finished height of 0.6-1.0m, extendable support stands, stage braces, adjustable bases, and stair access components, it is suitable for small performances, DJ events, ceremonies, church activities, presentations, and temporary event staging.
Assemble Portable Stage Movable Aluminum Stage for Outdoor Concert Event 2.44x1.22m 8x4ft with 1 stair.
The DragonStage 2.44x1.22m Portable Aluminum Stage Kit is a compact 8x4ft temporary event platform supplied with one access stair. Designed for small outdoor concerts, DJ performances, speeches, ceremonies, promotions, and temporary event use, the modular stage can also be combined with additional compatible 4x8ft units when a larger platform is required.
The DragonStage 3.8x3.4m Aluminum Arch Truss Gateway is a compact curved entrance structure built from 290×290mm spigot truss with 300×500mm base plates. With overall external dimensions of approximately 3800mm wide × 3400mm high, it is designed for wedding entrances, exhibition gateways, red-carpet areas, event decoration, photo zones, and other temporary event displays.
Base plate only for the U-Frame 50. LED cans and moving heads can be installed freeriding in the room. In combination with the optional wheels the U-Frame Dolly will be an indispensable element on stages and show acts.
U-frame Truss And Dolly, it is custom U torm trusses (660 × 500 × 50mm) for 4 (4 utorm trusses+ top bar+ dolly) and 5 (4 utorm trusses+ top bar+ dolly) Robots in black color.
the dolly is made of 1.2x0.6m aluminum plate, thickness 8mm and 4 casters.
The DragonStage 5.49x1.22m Straight Aluminum Event Stage Ramp provides a direct access route for wedding stages, corporate events, ceremonies, hotel functions, and other temporary platforms. The ramp measures approximately 18ft long × 4ft wide (5.49 × 1.22m) and uses modular 4 × 4ft / 1.22 × 1.22m deck sections with 1m / 3.28ft high guardrails along both sides.
The DragonStage 3.0x1.22m Compact Aluminum Stage Transition Ramp provides a short, direct access route between ground level and temporary event stages. With an overall length of approximately 3.0m / 9.84ftand a width of approximately 1.22m / 4ft, the ramp uses modular aluminum stage components and includes 1m / 3.28ft high guardrailson both sides.
The DragonStage 7.84x1.23m Narrow Straight Aluminum Stage Access Ramp provides a direct route between ground level and an elevated temporary stage for performers, speakers, technicians, event staff, and production crew. Its slim footprint measures approximately 308⅝ × 48⅜ in (7.84 × 1.23m)and uses modular 4 × 4 ft / 1.22 × 1.22mramp deck sections with 1m / 3.28ft high guardrailsalong both sides.
