K1 Owner's Manual

Safety Instructions

Inspect the system before any deployment. Perform safety-related checks and inspections before any deployment. Perform preventive maintenance at least once a year. Insufficient upkeep of the product can void the warranty. If any safety issue is detected during inspection, do not use the product before performing corrective maintenance. Check for issues such as missing or loose rigging parts/fasteners, bends, breaks, corrosion, cracks, deformation, wear, holes in rigging parts, or missing safety cues/labels. Never incorporate equipment or accessories not approved by L-Acoustics. Read all related PRODUCT INFORMATION documents before operating the system.

Do not store the product on an unstable cart, stand, tripod, bracket, or table.

Beware of sound levels. Do not stay in close proximity to loudspeakers in operation, as high sound pressure levels (SPL) can lead to permanent hearing damage. Hearing damage can also occur at moderate levels with prolonged exposure. Check applicable laws and regulations relating to maximum sound levels and exposure times.

Work with qualified personnel for rigging the system. Installation should only be carried out by qualified personnel familiar with rigging techniques and safety recommendations. Ensure personnel health and safety; during installation and set-up, personnel must wear protective headgear and footwear at all times. Under no circumstances is personnel allowed to climb on a loudspeaker assembly.

Respect the Working Load Limit (WLL) of third-party equipment. L-Acoustics is not responsible for rigging equipment and accessories provided by third-party manufacturers. Verify that the WLL of suspension points, chain hoists, and all additional hardware rigging accessories is respected.

Respect maximum configurations and recommended safety precautions. Model the system in Soundvision and refer to warnings in the Mechanical Data section to check conformity.

Be cautious when flying a loudspeaker configuration. Before installing/raising, check each element for secure fastening. Always verify no one is standing underneath when installing/raising. Never leave the product unattended during installation. L-Acoustics recommends the use of secondary safety at all times.

Be cautious when ground-stacking. Do not stack on unstable ground or surfaces. If stacked on a structure, platform, or stage, always check that it can support the total weight. L-Acoustics recommends the use of safety straps at all times.

Risk of falling objects: Verify that no unattached items remain on the product or assembly.

Risk of tipping: Remove all rigging accessories before transporting a product or assembly. Take into account wind effects on dynamic load. When deployed in an open-air environment, wind can produce dynamic stress. If wind force exceeds 6 bft (Beaufort scale), lower down and/or secure the product or assembly.

Intended Use: This system is intended for use by trained personnel for professional applications.

L-Acoustics reserves the right to change specifications and document content without prior notice. Check www.l-acoustics.com regularly for updates.

Long-term exposure to extreme conditions may damage the product. Refer to the Products weather protection document.

Read the maintenance section before servicing. Contact L-Acoustics for advanced maintenance. Unauthorized maintenance voids the warranty.

This marking indicates that this product should not be disposed of with household waste. Recycle responsibly to promote sustainable reuse of material resources. Use return and collection systems or contact the retailer for environmentally safe recycling.

Introduction

K1 large format WST line source

The K1 enclosure is a full-range element of a large format WST® line source with variable curvature. It features two 15" speakers in a bass-reflex enclosure, four 6.5" high-efficiency direct radiating speakers, and three 3" diaphragm compression drivers coupled to individual DOSC® waveguides. The transducers are implemented in a K-shape configuration. The K1 enclosure is based on a 3-way active design with 2 LF sections, 1 MF section, and 1 HF section, each at a nominal impedance of 8 ohms. It is constructed from first-grade Baltic birch plywood for maximum acoustical and mechanical integrity, with an integrated four-point rigging system.

The K1 enclosure operates over the nominal frequency range of 35 Hz to 20 kHz. The frequency response can be extended down to 30 Hz with the K1-SB extension or 25 Hz with the KS28 subwoofer. The K1 generates a symmetric horizontal coverage of 90°.

The rigging system allows vertically assembling K1 enclosures with various inter-element angles up to 5°, forming a line array with variable curvature. The coplanar symmetry and DOSC® waveguide in the HF region ensure perfect acoustic coupling between array elements. The WST® (Wavefront Sculpture Technology) criteria are fulfilled, qualifying the array as a true line source, providing smooth tonal response and lobe-free coverage.

The K1 system is driven by LA12X amplified controllers, ensuring active system linearization, intelligent transducer protection, and optimization. Acoustic performance depends on the used preset and physical configuration.

How to use this manual

This manual is intended for all involved in system design, implementation, preventive, and corrective maintenance of the K1 system. Follow these steps:

1. Read the technical description for an overview of system elements, features, and compatibilities (Electro-acoustical description, p.13; Rigging system description, p.17).
2. Prepare the system configuration, considering mechanical limits and acoustical configurations (Mechanical safety, p.28; Loudspeaker configurations, p.30).
3. Before rigging, perform mandatory inspections and functional checks (Inspection and preventive maintenance, p.41).
4. To deploy the system, follow step-by-step rigging instructions and refer to cabling schemes (Rigging procedures, p.62; Connection to LA amplified controllers, p.104).

The Corrective maintenance section (p.106) covers operations authorized for the end-user. Performing other operations exposes to hazardous situations. For advanced maintenance, contact your L-Acoustics representative.

L-Acoustics reserves the right to change specifications and document content without prior notice. Check www.l-acoustics.com for the latest updates.

Contact information

For advanced corrective maintenance, contact your Certified Provider or L-Acoustics representative. For Certified Providers, contact L-Acoustics customer service: customer.service@l-acoustics.com (EMEA/APAC), laus.service@l-acoustics.com (Americas).

Symbols

• ⚠️ This symbol indicates a potential risk of harm to an individual or damage to the product. It notifies the user about instructions that must be strictly followed for safe installation or operation.
• ℹ️ This symbol notifies the user about instructions that must be strictly followed for proper installation or operation.
• ? This symbol notifies the user about complementary information or optional instructions.

Revision history

System components

Loudspeaker enclosures:

• K1: 3-way full-range active WST® enclosure.
• K1-SB: K1 system subwoofer, 2x15".
• K2: 2x15" 3-way full-range active WST® enclosure.
• Kara II: 2-way active WST® enclosure: 2 x 8" LF + 3" HF diaphragm.
• KS28: Flyable subwoofer, 2 x 18".

Powering and driving system:

• LA12X: Amplified controller, 4 x 2600 W / 4 ohms. Refer to the LA12X owner's manual.

Racks:

• LA-RAK II AVB: Touring rack containing three LA12X, LA-POWER II, LA-PANEL II, and two LS10 for AVB distribution.

Cables:

• SP cables: SpeakON loudspeaker cables (4-point, 4 mm² gauge) in various lengths (SP.7, SP5, SP10, SP25).
• SP-Y1: Breakout cable for two passive enclosures (2.5 mm² gauge), 4-point speakON to 2 x 2-point speakON with CC4FP adapter.
• DO cables: PA-COM loudspeaker cables (8-point, 4 mm² gauge) in various lengths (DO.7, DO.10, DO.25).
• DOSUB-LA8: Breakout cable for four passive enclosures (4 mm² gauge), 8-point PA-COM to 2 x 2-point speakON.
• DOFILL-LA8: Breakout cable for two 2-way active enclosures (4 mm² gauge), 8-point PA-COM to 2 x 4-point speakON.
• DO3WFILL: Breakout cable for one 2-way active enclosure and two passive enclosures (4 mm² gauge), 8-point PA-COM to 1 x 4-point speakON and 2 x 2-point speakON.

Information about enclosure connection to LA amplified controllers is provided in this document. Refer to the LA12X owner's manual for detailed instructions on the entire cabling scheme.

Rigging elements:

• K1-BUMP: Structure for flying and stacking K1 and K1-SB arrays.
• K1-DELTA: Rigging accessory for rear attachment of 2 motors to K1-BUMP.
• KARA-DOWNK1: Flying bumper for rigging KARA (II) under K1 or K1-SB.
• K1-LASERMOUNT: K1 laser support plate (compatible with TEQSAS / SSE Prosight / Align Array / KSG).
• K2-LINK: Rigging accessory for rear attachment of K2 below K1.

Transportation accessories:

• K-BUMPFLIGHT: Modular flight case for 2 K1-BUMP or 2 K2-BUMP.
• K1-CHARIOT: Chariot for 4 x K1 or 4 x K1-SB.
• K1-CHARIOTCOV: Protective cover for 4 x K1/K1-SB on CHARIOT.
• K1-PLA: Removable front dolly for K1 or K1-SB enclosure.
• K1-COV: Protective cover for K1 enclosure.
• K1-SBCOV: Protective cover for K1-SB enclosure.

Software applications:

• Soundvision: 3D acoustical and mechanical modeling software.
• LA Network Manager: Software for remote control and monitoring of amplified controllers.

System component illustrations:

Cables: Illustrations show various cables including SP cables (0.7 m / 2.3 ft, 5 m / 16.4 ft, 10 m / 32.8 ft, 25 m / 82 ft) and SP-Y1 (1 m / 3.3 ft), DO cables (0.7 m / 2.3 ft, 10 m / 32.8 ft, 25 m / 82 ft, 3.5 m / 11.5 ft), DOFILL-LA8, DOSUB-LA8, DO3WFILL.

Rigging accessories: Illustrations show K1-BUMP, K1-DELTA, KARA-DOWNK1, K1-LASERMOUNT, K2-LINK.

Software applications: Illustrations show Soundvision and LA Network Manager icons.

Transportation: Illustrations show K-BUMPFLIGHT, K1-CHARIOT, K1-CHARIOTCOV, K1-PLA, K1-COV, K1-SBCOV.

Electro-acoustical description

Directivity

Dispersion angle diagram of a K1 array, using lines of equal sound pressure at -3 dB, -6 dB, -12 dB.

Preset description

Tables detailing presets for K1, K2, KARA-DOWNK1, K1SB, and KS28 systems, specifying loudspeaker elements, outputs, channels, routing, gain, delay, polarity, and mute status.

Connectors

K1 / K2: 2 x 8-point PA-COM connectors. Internal pinout for L-Acoustics 3-way active enclosures maps PA-COM points A/B to left LF, C/D to right LF, E/F to MF, and G/H to HF transducers.

K1-SB: 1 x 4-point speakON connector. Pinout for L-Acoustics subwoofers maps speakON points 1+/1- to LF+/LF- transducers. Point 2+/2- are not linked.

KS28: 1 x 4-point speakON connector. Pinout maps speakON points 1+/1- to LF+/LF- transducers. Point 2+/2- are not linked.

Kara II: 2 x 4-point speakON connectors. Pinout maps speakON points 1+/1- to LF+/LF- transducers and 2+/2- to HF+/HF- transducers.

Rigging system description

The K1/K1-SB rigging system integrates two arms on each side for connecting to other elements or flying frames. A front sliding arm allows inter-element angle setting (nine positions: 0° to 5°), and a rear rotating arm enables rear connection. Rigging arms are secured with three ball-locking pins per side. An automatic system with buttons and latches secures adjacent enclosures or rigging accessories, featuring yellow safety labels visible when not safely locked.

Two ergonomic handles are present on each side of K1 for handling. K1/K1-SB features two ground runners for enclosure protection, with tracks on the top fitting these runners in stacking deployment.

Rigging elements

• K1-BUMP: A rigging frame for flying K1/K1-SB arrays. It has a central rigging bar with four Ø 22 mm shackles for security slings, K1-BPCHAIN, and K1-DELTA. It also features a support plate for a laser inclinometer. An identification sticker denotes front/rear. A rack stabilizer accommodates LA-RAK II AVB touring racks. The central bar has holes for site angle adjustments (front or rear overhang).
• K1-BPCHAIN: An adjustable extension chain compatible with K1-BUMP or K2-BUMP, with a WLL of 3.15 t, necessary for climbing-hoist setup to prevent chain bags from obstructing enclosures.
• K1-DELTA: Designed for azimuth angle setting. Combined with K1-BUMP, it controls azimuth angle while K1-BUMP controls site angle. Recommended spacing between lifting points is 1 m / 3.3 ft. Azimuth angle can be adjusted from -10° to +10° by adjusting pickup point heights.
• K1-LASERMOUNT: A support plate for mounting a laser inclinometer to the side of a K1 or K1-SB enclosure, installed at the rear, on the right side.
• KARA-DOWNK1: A rigging interface for Kara II under a K1 array. Four tabs on top are compatible with the K1 rigging system, and four slits with ball-locking pins accommodate Kara II rigging arms.
• K2-LINK: An interface between K1 and K2 rigging systems, used to hang K2 under K1, K1-SB, or K1-BUMP. Three holes at the top provide angle settings (0.25°, 2.5°, 5°) between the top K2 and bottom K1 element. The 0.25° hole aligns K2 and K1 element front faces.

Transportation

• K-BUMPFLIGHT: A modular flight case for transporting K1 system accessories. It allows lifting K1-BUMP directly from the case. It can transport up to two K1-BUMP and accessories. With additional compartments, it can hold up to four K1-BUMP.
• K1-CHARIOT: A chariot for transporting and storing blocks of up to four K1 or K1-SB enclosures. It features four rigging arms to secure the lower enclosures. Do not move or transport more than four enclosures on K1-CHARIOT. Risk of severe injury if used with other equipment. Remove all enclosures before maintenance.
• K1-CHARIOTCOV: A protective cover for a stack of four K1 or K1-SB enclosures, with a rear zipper for connector plate access.
• K1-PLA: A dolly board secured to the front of a K1 or K1-SB with two ball-locking pins. Intended for use only with L-Acoustics K1 or K1-SB. Multiple K1-PLA can be stacked for storage.
• K1-COV / K1-SBCOV: Protective covers for one K1 or K1-SB enclosure on K1-PLA. Each has a foldable flap for connector plate access.

Mechanical safety

The K1 rigging system complies with the 2006/42/EC Machinery Directive and BGV-C1 guidelines, achieving a safety factor of 4 or more for flown deployments described in this manual. Refer to Soundvision for the safety factor of specific deployments.

Safe Limit vs. Maximum Limit: The safe limit indicates the maximum number of elements for a compliant safety factor under defined use, regardless of deployment parameters. The maximum limit indicates the maximum number for potential compliance under optimal mechanical conditions. For mixed arrays, consult Soundvision.

K1 Configuration Limits:

• Flown K1 array with K1-BUMP: Safe limit 16, Maximum limit 24.
• Flown K1 array with K1-BUMP and Kara II downfill: 14 K1 + 3 LA-RAK II AVB (Safe limit), 23 K1 + 4 LA-RAK II AVB (Maximum limit).
• Flown K1-SB array with K1-BUMP: Safe limit 20, Maximum limit 24.
• Flown K1-SB array with K1-BUMP and LA-RAK II AVB: 18 K1-SB + 3 LA-RAK II AVB (Safe limit), 24 K1-SB + 4 LA-RAK II AVB (Maximum limit).
• Flown KS28 array with KS28-BUMP: Maximum/Safe limit 16.

Other Configurations:

• Stacked K1 with K1-CHARIOT: Safe limit 4, Maximum limit 4.
• Stacked KS28 (upright): Safe limit 4, Maximum limit 4.
• Stacked KS28 (on chariot): Safe limit 2, Maximum limit 2.

Assessing Mechanical Safety:

• WLL is not enough: Rated WLL indicates resistance to tensile stress but is insufficient for complex systems like loudspeaker arrays.
• Mechanical modeling with Soundvision: Working load and safety factor depend on array composition and implementation. Soundvision provides complex mechanical modeling and calculation.
• Assessing safety with Soundvision: The overall safety factor is the lowest among all linking points. Always model with Soundvision and check the Mechanical Data section. A stress warning appears when safety levels are exceeded.
• Safety of ground-stacked arrays: Soundvision includes a stability warning for ground-stacked arrays indicating tipping hazards if not secured. It is the user's responsibility to secure the array.
• Additional safety for flown arrays: Use available holes to implement secondary safety.
• Unusual conditions: Soundvision calculations are based on usual conditions. Higher safety factors are recommended for extreme temperatures, strong wind, or prolonged salt water exposure. Consult a rigging specialist.

Loudspeaker configurations

Line source

The system operates as a line source over the K1 enclosure's nominal bandwidth. Two configurations are possible:

• K1 line source: Uses only K1 enclosures. Preset: [K1]. Frequency range (-10 dB): 35 Hz - 20 kHz.
• K1/K1-SB line source: Enhanced LF throw by using K1-SB as an LF line source element. Preset for K1: [K1]. Preset for K1-SB: [K1SB_X]. Recommended ratio: 2 K1 : 1 K1-SB. Minimum line length: 8 K1 + 4 K1-SB. When using [K1] with [K1SB_X], do not add delay between elements.

K1-SB applications

K1-SB has two applications in a K1 system:

• LF extension in a line source: For enhanced throw, using the [K1SB_X] preset with K1.
• Subwoofer: For increased impact, using the [K1SB_60] preset.

Both applications can be combined. Diagrams illustrate K1-SB as an LF extension and as a subwoofer.

Additional subwoofer system

A K1 or K1/K1-SB line source can be deployed with additional subwoofers for increased sub-low resources. Two systems are available: K1-SB for impact, and KS28 for infra extension. The recommended ratio is one K1 for one subwoofer. Presets [K1SB_60] and [KS28_60] provide an upper frequency limit at 60 Hz for optimal coupling.

• K1-SB: Extends bandwidth to 30 Hz. Deployments include K1-SB beside the line source (side LF rejection) or behind it (rear LF rejection/cardioid). Diagrams show these configurations. Pre-alignment delays are provided for [K1] + [K1SB_60] configurations.
• KS28: Extends bandwidth to 25 Hz. Diagrams show KS28 line source configurations. Pre-alignment delays are provided for [K1] + [KS28_60] and [K1] + [K1SB_X] + [KS28_60] configurations. Cardioid configurations using [xxxx_xx_C] or [xxxx_xx_Cx] presets are mentioned.

Additional downfill element

K1 systems can be combined with Kara II or K2 line source downfill systems for extended vertical coverage to closer audience areas.

• Kara II: Presets [KARAIIDOWNK1], [KARAIIDOWNK1 70], [KARAIIDOWNK1 90] include a high-pass filter at 55 Hz and specific delay settings for optimal coupling. The Kara II enclosure is driven by LA4X / LA12X. The [KARAIIDOWNK1] preset is optimized for 110° fin settings. Diagrams show line source with Kara II downfill. No delay should be added between K1 and Kara II elements.
• K2: The [K2 110] preset provides K2 with the same horizontal coverage as K1 for optimal downfill. The K2 enclosure is driven by LA4X / LA12X. Diagrams show line source with K2 downfill. No delay should be added between K1 and K2 elements.

Inspection and preventive maintenance

How to do preventive maintenance

Inspect the system before any deployment and after any corrective maintenance. Perform preventive maintenance at least once a year. This includes inspecting rigging and hardware (Rigging part inspection, p.42; Rigging check, p.52) and acoustical checks (Enclosure check, p.58; Listening test, p.60). If parts are damaged, contact your L-Acoustics representative. For speaker repair, refer to the Corrective maintenance section (p.106).

Rigging part inspection

Inspect critical rigging parts, including lifting accessories, rigging accessories, fasteners, integrated rigging elements, and transportation accessories. Perform inspections in a well-lit environment. Check for presence, disassemble if necessary (checking tethers), inspect from all sides for corrosion, wear, cracks, bends, dents, holes, missing labels, or loose fasteners. Check part geometry on a flat surface and inspect moving parts for correct engagement. If a screw is loose, replace it or use blue threadlocker. If a problem is detected, perform authorized maintenance or contact your L-Acoustics representative.

Mechanical system overview

Diagrams highlight critical parts of lifting chains, indicating visual inspection (?️) and functional checks (⚙️). Refer to Inspection references (p.49) for specific checks.

Example configurations shown with inspection points:

• K1 mixed array with K1-BUMP and K1-SB.
• K1 array with K1-BUMP, KARA-DOWNK1 and Kara II.
• K1 array with K1-CHARIOT.
• K1 array with K1-BUMP and LA-RAK II AVB.
• K2 mixed array with K1-BUMP, K1-SB, and K2-LINK.

Note on screws: If a screw is loose, remove and replace it with a new one from the repair kit. If unavailable, use blue threadlocker and do not overtighten.

Inspection references

• Shackles: Check that the shackle axis moves freely in its lodging and is flush with the shackle.
• Ball-locking pins: Inspect tethers. Check the push button mechanism for retraction and activation. Ensure pins insert and lock securely. If the check fails, withdraw the product from use.
• Grill safety: Visually and mechanically inspect grill safety.
• Moving parts (O-rings, screws): Ensure O-rings are not damaged and screws are tightened. Pull on O-rings to ensure they don't break or become loose. Replace damaged or missing O-rings.

Rigging check

Procedure involves positioning enclosures on K1-CHARIOT, securing front and rear rigging arms with ball-locking pins, checking the automatic locking system deactivation/activation, and ensuring enclosures remain attached when lifted. Disassembly requires careful handling of enclosures.

Acoustical check

• Enclosure check: Performed via LA12X amplified controller. Measures impedance at reference frequencies to detect circuit continuity issues. Prerequisites include specific ambient temperature, enclosures at room temperature, correct presets, and specific cable types (10 m / 30 ft 4 mm² speaker cables). Procedure involves powering up, connecting, loading preset, navigating to ENCLOSURE CHECK, launching the check, and interpreting results (OK, ?, NC, NOK, UNDEF).
• Listening test: Load preset on LA12X, connect sine wave generator, scan bandwidth focusing on usable range. Sound should be pure and free of unwanted noise.
• Troubleshooting for LF/MF speakers: Possible causes include loose screws, air leaks, dust on cone, damaged cone, torn surround, or damaged voice coil/spider. Procedure involves disassembly, visual inspection of cables/connectors/speaker parts, cleaning, reassembly, and re-testing. Replace speaker if problem persists.
• Troubleshooting for HF drivers: Possible causes include foreign particles in air gap, misaligned diaphragm, loose screws, or damaged diaphragm. Procedure involves diaphragm disassembly, inspection, air gap cleaning, reassembly, and re-testing. Replace driver if problem persists.

Rigging procedures

This section details various rigging procedures for K1 and associated components.

Preparing K1-BUMP

Requires 2 operators and accessories like shackles, K1-DELTA, K1-BPCHAIN. K1-BUMP is transported in K-BUMPFLIGHT. Procedure involves removing lid, removing storage pins, placing rigging bar in rigging position, securing it with pins, and optionally securing K1-BPCHAIN and K1-DELTA. K1-BUMP is then lifted by motor.

Securing LA-RAK II AVB on K1-BUMP

Requires 2 operators and accessories like shackles and rack stabilizer. Up to four LA-RAK II AVB can be rigged on K1-BUMP. Procedure involves removing coupling bars from LA-RAK II AVB, positioning racks on K1-BUMP, securing them with coupling bars, sliding and locking the rack stabilizer, and securing motor hooks to K1-BUMP rigging bar. Specific placement of front motor chain is required for stability.

Preparing a block of four K1/K1-SB

Requires 2 operators and K1-CHARIOT. Procedure involves positioning enclosures on K1-CHARIOT, securing them with ball-locking pins, and connecting front and rear rigging arms between enclosures using pins. The top enclosure's angle is set to 0°.

Presetting the inter-enclosure angles of K1/K1-SB

Procedure involves deactivating the automatic locking system, removing ball-locking pins, sliding out front rigging arms to desired angle holes, inserting pins, and pressing angle locking buttons to lock angles. Repeat for each inter-enclosure angle.

Flying K1

Flying a K1/K1-SB array with K1-BUMP

Requires 3 operators and K1-BUMP. Prerequisites include preparing K1-BUMP, securing LA-RAK II AVB (if used), preparing a block of four K1/K1-SB, and presetting inter-enclosure angles. The procedure involves lifting K1-BUMP, positioning the enclosure block underneath, securing K1-BUMP to the array using ball-locking pins, checking all connections, slightly raising the array to lock angles, and removing K1-CHARIOT. Secondary safety implementation is recommended.

Attaching a block of four K1 under a K1 array

Requires 3 operators and K1-BUMP. Prerequisites include preparing a block of four K1 and presetting angles. The procedure involves positioning the block, securing front rigging arms, raising the array to lock angles, removing K1-CHARIOT, securing rear rigging arms, and repeating for subsequent blocks. Secondary safety is recommended.

Attaching a block of four K2 under a K1/K1-SB array

Requires 3 operators and K2-LINK. K1/K1-SB must be on top of K2. Prerequisites include preparing K1/K1-SB and K2 blocks and presetting angles. The procedure involves positioning K2 block, securing front rigging arms, checking connections, turning front wheels inward, connecting K2-LINK interfaces between K1/K1-SB and K2, lowering the array to align K2-LINK, securing K2-LINK, raising the array, and removing K2-CHARIOT.

Flying a K1 array with K1-BUMP using the CATERPILLAR method

This method prepares the array on the ground by adding enclosures one by one, each on a K1-PLA dolly board. Requires 3 operators and K1-BUMP, K1-PLA. Procedure involves lining up K1-BUMP and enclosures, raising K1-BUMP, deactivating automatic locking systems, lifting and securing rear rigging arms, presetting angles, securing K1-BUMP rear arms, removing pins from K1-PLA, raising the array to separate K1-PLA, securing front rigging arms to K1-BUMP, and repeating for subsequent enclosures. Secondary safety is recommended.

Removing a K1 array using the CATERPILLAR method

This method lands each enclosure on a K1-PLA dolly board for individual shipping. Requires 3 operators and K1-PLA. Procedure involves lowering the array, securing K1-PLA to bottom enclosures, releasing latches, landing enclosures by pulling back and lowering, removing angle setting pins, and pulling back rear rigging arms. K1-BUMP and LA-RAK II AVB are then removed.

Connection to LA amplified controllers

Refer to the Amplication reference technical bulletin for compatibility and cabling schemes. The table shows enclosure drive capacity per amplified controller (LA12X):

• K1: 2 per output / 2 total
• K1-SB: 1 per output / 4 total
• K2: 3 per output / 3 total
• Kara II: 3 per output / 6 total

Cabling schemes are provided for K1/K2 (4-channel CA-COM output), K1-SB (2-channel speakON output, 4-channel CA-COM output), and Kara II (4-channel CA-COM output, 2-channel speakON output).

Corrective maintenance

This section details maintenance procedures for K1 and K1-SB enclosures.

K1

Introduction: Procedures include D/R (Disassembly/Reassembly) for Grill, LF speaker, Fins, MF speaker, Connector plate, HF driver, and HF diaphragm. Advanced maintenance requires contacting an L-Acoustics representative.

K1 Exploded Views: Diagrams illustrate the order of disassembly and reassembly for components, referencing specific D/R procedures and repair kits (KR).

• LF speaker: Uses KR HPPH154 reconing kit.
• Grill: Uses KR SECUGRL kit for O-rings.

Disassembly and Reassembly procedures:

• D/R - Grill: Requires torque screwdriver, hex bits, grill safety tool, flat tool, and consumables like blue threadlocker. Procedures detail removing screws and O-rings.
• D/R - LF speaker: Requires torque screwdriver, hex bits, and repair kit KR HPPH154. Procedure details removing speaker with screws, tightening in a star pattern.
• D/R - Fins: Requires torque screwdriver, Torx bit, and repair kit KR HPPH62. Procedure details removing fin screws.
• D/R - MF speaker: Requires torque screwdriver, hex bits, and repair kit KR HPPH62. Procedure details removing MF speaker screws.
• D/R - Connector plate: Requires torque screwdriver, Torx bit, adhesive gasket kit, and specific screws. Procedure details removing connector plate and replacing gasket.
• D/R - HF driver: Requires torque screwdriver, hex bits, adhesive gasket kit, and specific screws. Procedure details removing HF driver and gasket.
• D/R - HF diaphragm: Requires torque screwdriver, hex bits, hex wrench, compressed air blower, double-face adhesive tape, and repair kit KR HSBC33. Procedure details cleaning the air gap and replacing the diaphragm.

K1-SB

Introduction: Procedures include D/R for Grill and LF speaker. Advanced maintenance requires contacting an L-Acoustics representative.

Exploded Views: Diagrams illustrate disassembly for LF speaker (using KR HPPH154) and Grill.

Disassembly and Reassembly procedures:

• D/R - Grill: Requires torque screwdriver, hex bit, and repair kit KR HPPH154. Details removing screws.
• D/R - LF speaker: Requires torque screwdriver, hex bit, and repair kit KR HPPH154. Details removing speaker with screws, tightening in a star pattern.

Specifications

Detailed specifications for various L-Acoustics components:

K1 specifications

¹ Peak level measured at 1 m under free field conditions using pink noise with crest factor 4 (preset specified in brackets).

K1 dimensions: Height 520 mm / 20.5 in, Width 1342 mm / 52.8 in, Depth 505 mm / 19.9 in.

K2 specifications

¹ Peak level measured at 1 m under free field conditions using pink noise with crest factor 4 (preset specified in brackets).

K2 dimensions: Height 400 mm / 15.8 in, Width 1338 mm / 52.7 in, Depth 286 mm / 11.3 in.

K1-SB specifications

¹ Peak level at 1 m under half space conditions using pink noise with crest factor 4 (preset specified in brackets).

K1-SB dimensions: Height 520 mm / 20.5 in, Width 1342 mm / 52.8 in, Depth 505 mm / 19.9 in.

Kara II specifications

¹ Peak level measured at 1 m under free field conditions using pink noise with crest factor 4 (preset specified in brackets).

Kara II dimensions: Height 482 mm / 19 in, Width 733 mm / 28.9 in, Depth 383 mm / 15.1 in.

KS28 specifications

¹ Peak level at 1 m under half space conditions using pink noise with crest factor 4 (preset specified in brackets).

KS28 dimensions: Height 702 mm / 27.6 in, Width 1351 mm / 53.2 in, Depth 565 mm / 22.2 in.

K1-BPCHAIN specifications

K1-BPCHAIN dimensions: Length 1370 mm / 53.9 in.

K1-BUMP specifications

K1-BUMP dimensions: Height 584 mm / 23 in, Width 1266 mm / 49.8 in, Depth 580 mm / 22.8 in.

K1-CHARIOT specifications

K1-CHARIOT dimensions: Height 610 mm / 24 in, Width 1450 mm / 57.1 in, Depth 280 mm / 11 in.

K1-DELTA specifications

K1-DELTA dimensions: Height 48 mm / 1.9 in, Width 606 mm / 23.8 in, Depth 304 mm / 12 in.

K1-LASERMOUNT specifications

K1-PLA specifications

K1-PLA dimensions: Height 144 mm / 5.7 in, Width 1342 mm / 52.8 in, Depth 434 mm / 17.1 in.

KARA-DOWNK1 specifications

KARA-DOWNK1 dimensions: Height 117 mm / 4.6 in, Width 1330 mm / 52.4 in, Depth 512 mm / 20.2 in.

K2-LINK specifications

K2-LINK dimensions: Height 201 mm / 7.9 in, Width 307 mm / 12.1 in, Depth 10 mm / 0.4 in.

K-BUMPFLIGHT specifications

K-BUMPFLIGHT dimensions: Height 1224 mm / 48.2 in, Width 643 mm / 25.3 in, Depth 1469 mm / 57.8 in.

KS28-OUTRIG specifications

KS28-OUTRIG dimensions: Height 55 mm / 2.1 in, Width 83 mm / 3.2 in, Depth 1035 mm / 40.7 in.

Recommendation for speaker cables

Cable quality and resistance: Use only high-quality, fully insulated loudspeaker cables made of stranded copper wire with low resistance per unit length. Keep cables as short as possible for optimal performance. L-Acoustics recommends using cables of similar type, length, and gauge for symmetrical deployments.

The table below provides recommended maximum cable lengths for uncompromised performance:

Use the detailed L-Acoustics calculation tool available on their website (https://www.l-acoustics.com/installation-tools/) to evaluate cable length and gauge based on loudspeaker configuration.

Installing a laser inclinometer

K1-LASERMOUNT: This mount can secure a laser inclinometer vertically or horizontally using L-Acoustics Tech Toolcase II accessories. Compatible sensors include TEQSAS® LAP-TEQ PLUS, TEQSAS® LAP-TEQ, KSG® RECLINE Compact, UVM sensor, and SSE® ProSight. Ensure the sensor is calibrated for vertical use. Mounting involves using screws to attach the inclinometer to K1-LASERMOUNT.

K1-BUMP: Features a support plate for laser inclinometers. Compatible sensors include TEQSAS® LAP-TEQ PLUS, TEQSAS® LAP-TEQ, KSG® RECLINE Compact, and SSE® ProSight. Ensure sensor calibration for vertical use.

• With TEQSAS® LAP-TEQ PLUS / LAP-TEQ / KSG® RECLINE Compact: Remove four M4 Torx screws (T20) from the plate, apply threadlocker, position the sensor pointing towards the front of K1-BUMP, secure with screws, and connect the XLR cable. Refer to manufacturer instructions for calibration.
• With SSE® Prosight: SSE Prosight2 is an SSE product. Refer to SSE Fitting guides for mounting instructions on K Series bumpers.