Frequently
Asked Questions

A line array is a speaker system composed of multiple identical driver modules stacked vertically and acoustically coupled to behave as a single, controlled source. Unlike a point-source cabinet that radiates sound in all directions (including toward ceilings and floors where it causes reflections), a line array uses the vertical coupling of its elements to create a coherent wavefront with a narrow vertical dispersion angle — typically 10° to 30° — while maintaining wide horizontal coverage.

For venues larger than approximately 30 metres in throw distance, this controlled directivity means more sound energy reaches the audience and far less energy hits reflective surfaces. The result is higher intelligibility, more consistent SPL across the listening area, and significantly reduced feedback potential. K-Audio Pro's LA Series line arrays are engineered for arenas, concert touring, and large-format events where consistent coverage from front row to back is non-negotiable.

The number of modules required depends on three factors: the vertical throw distance to the farthest listener, the required SPL at that distance, and the splay angle needed to cover the nearest rows without over-driving. As a starting point:

• Small halls (up to 20 m): 4–6 modules per side
• Medium venues (20–40 m): 6–10 modules per side
• Large arenas and concert touring (40 m+): 10–16 modules per side

K-Audio Pro engineers will provide a full acoustic design and rigging specification based on your venue drawings. Send an enquiry with your venue dimensions and expected attendance to receive a customised system recommendation.

K-Audio Pro passive line array modules are designed to work with the LA Series power amplifiers. The LA2200 (2200W) is the standard touring amplifier providing sufficient headroom for most configurations. The LA4400 (4400W) is recommended for larger hangs where maximum SPL is required or where one amplifier channel must drive a larger number of modules in parallel.

A general rule: provide at least 1.5× the programme power rating of the speaker load. Underpowering a line array causes clipping distortion at high levels — a more common cause of driver damage than overpowering.

For music events, concerts, and any application requiring full-range playback below 80 Hz, yes. Line array modules are optimised for mid-high frequency reproduction; their physical dimensions make deep bass extension impractical. The K-Audio Pro Sub Stack System provides matched cardioid subwoofer configurations that integrate directly with the LA Series touring system, delivering controlled low-frequency energy without rear radiation into non-listening areas.

For speech-only applications such as conferences and presentations, a subwoofer stack is generally not required as fundamental speech energy sits between 100 Hz and 4 kHz.

K-Audio Pro LA Series modules are designed for both flown indoor installations and ground-stacked or truss-rigged outdoor deployments. The rigging hardware uses standard M12 suspension points rated to exceed the required safety factors for touring applications. For permanent indoor installation, a structural engineer should certify the ceiling or truss attachment points.

Outdoor use in wet conditions requires weather covers. K-Audio Pro can advise on appropriate protective enclosures for permanent outdoor installations.

Active (powered) speakers contain a built-in amplifier. You connect a line-level signal directly from a mixer — no external amplifier required. The built-in amplifier is factory-matched to the speaker's drivers, which typically results in optimised crossover points and protection circuitry. Active speakers are faster to set up and work well for smaller events and portable PA applications.

Passive speakers require an external power amplifier between the mixer and the speaker. The K-Audio Pro FP Series passive speakers are designed to work with LA Series amplifiers. Passive systems are preferred by professional touring engineers because they offer greater flexibility, easier driver replacement in the field, and allow a single rack-mounted amplifier to drive multiple cabinets.

Wattage is often misunderstood. SPL (sound pressure level, measured in decibels) is a more useful metric than raw wattage. However, as a practical guide for venue sizing:

• Small rooms up to 100 people: 250–400W (e.g. FP210 or FP212)
• Medium halls 100–500 people: 400–800W (e.g. FP215 pair)
• Large events 500–2000 people: Line array system recommended

Crucially, sensitivity matters as much as wattage. A speaker with a 103 dB/1W/1m sensitivity produces twice the acoustic output of a 100 dB sensitivity speaker running the same wattage — sensitivity is a 3 dB gain for free. Always compare specifications holistically rather than wattage figures alone.

All three are two-way passive full-range cabinets from the K-Audio Pro FP Series. The key differences are woofer size, maximum SPL, and target application:

• FP210 — 10-inch woofer, 250W: Compact monitor or side-fill. Works well as a stage monitor or compact venue PA where portability is a priority.
• FP212 — 12-inch woofer, 300W: Mid-size halls, small-format touring, and permanent installation in rooms up to approximately 300 attendees.
• FP215 — 15-inch woofer, 400W: Large-format live touring and events. The 15-inch driver delivers extended low-mid response, making it the preferred choice where a subwoofer is not in the rig.

For music performances where you need kick drum punch and bass guitar body, adding the FPE18SAD active subwoofer will significantly extend the system's low-frequency response. For corporate speech, presentations, and conference applications, the FP Series alone is typically sufficient.

A good rule of thumb: if the content includes live music or DJ sets, add a sub. If the content is primarily spoken word, the FP Series handles it without one.

Both are professional touring amplifiers from the K-Audio Pro LA Series using Class-D output stages for high efficiency and low heat generation.

• LA2200 — 2200W: The standard touring amplifier for driving FP Series passive speakers and most line array configurations. Suitable for the majority of professional applications.
• LA4400 — 4400W: High-current amplifier for large line array hangs, high-power subwoofer stacks, and arena-scale systems where maximum headroom is required.

If in doubt, the LA4400's additional headroom is always beneficial — it runs cooler under programme material and produces measurably lower THD at typical operating levels than a smaller amplifier pushed to its limits.

Impedance matching is critical. Running a speaker below the minimum rated impedance of an amplifier can damage it. The key rules:

• Two 8Ω speakers wired in parallel = 4Ω load. Confirm your amplifier supports 4Ω stereo operation.
• Two 8Ω speakers wired in series = 16Ω load. Most amplifiers deliver less power into 16Ω — check the datasheet.
• Never wire speakers in parallel below the amplifier's minimum rated impedance.

K-Audio Pro amplifiers include built-in protection circuits that detect abnormal load conditions, but correct wiring is always better than relying on protection. Contact us for specific wiring diagrams for your rig configuration.

The LA Series amplifiers are high-power output stages optimised for tour-grade reliability. DSP processing — including crossover, time alignment, and speaker protection presets — is handled upstream in the signal chain, either via the K-Audio Pro PMR Series powered mixers (which include onboard DSP) or via a dedicated outboard DSP processor.

This architecture keeps the amplifier stage simple and reliable while allowing the DSP to be updated via software rather than requiring hardware replacement.

Powered mixers combine a mixing console and power amplifier in a single unit. You connect passive speakers directly to the speaker outputs without a separate amplifier. They are compact, portable, and cost-effective for smaller setups.

Unpowered mixers output a line-level signal that must feed a separate power amplifier before reaching passive speakers. For touring and large installations, unpowered mixers paired with dedicated amplifier racks give engineers more control, easier troubleshooting, and the ability to replace one component without the entire system going down.

The K-Audio Pro PMR Series covers both types: the PMR0640 and PMR1260 are powered mixers for portable applications; larger configurations are available as unpowered for rack-mount touring setups.

Count every input source and add a 20–30% buffer for expansion. Common channel counts by application:

• Small events / presentations: 6–8 channels (PMR0640)
• Live bands: 12–16 channels minimum (PMR1260 / PMR1680)
• Multi-act shows and theatres: 24+ channels
• Conference facilities: Determined by delegate microphone count — see Conference section below

It is almost always better to buy one size larger than you currently need. Adding a mixer mid-setup is far more disruptive than having spare inputs available.

UHF (Ultra High Frequency, 470–790 MHz) is the professional standard for wireless microphone systems. UHF signals penetrate obstacles better than VHF, support more simultaneous channels operating in the same environment without interference, and deliver more stable range in complex RF environments such as arenas and convention centres.

VHF (Very High Frequency, 174–216 MHz) systems are older technology, cheaper to manufacture, but susceptible to interference from FM broadcast signals and support fewer simultaneous channels. They are not recommended for professional applications.

K-Audio Pro URX Series wireless microphone systems operate in the UHF band and include automatic frequency scanning to identify clean operating frequencies in any RF environment.

The number of simultaneous UHF wireless channels depends on the available clean frequency spectrum at your location and how well each system's auto-scan function spaces them. In a typical venue with no heavy external RF congestion, 8–12 UHF systems can operate reliably in the same room.

In congested urban environments or venues near TV broadcast transmitters, this number may be lower. The URX9300's auto frequency scanning identifies optimal operating windows to maximise the number of clean simultaneous channels. For events requiring 16+ simultaneous wireless channels, contact K-Audio Pro for a coordinated frequency plan.

In line-of-sight conditions with the receiver antenna optimally positioned, the URX Series systems deliver reliable operation at distances up to 80–100 metres. In real-world stage environments with bodies, equipment, and reflective surfaces in the signal path, effective range is typically 30–60 metres.

Antenna placement is critical. Mount receiver antennas at stage level pointing toward the performance area — never behind a metal surface or inside a rack with the door closed. For large stages, remote antenna systems can extend effective coverage.

Use a wired microphone (such as the K-Audio Pro CDM100) when the performer is stationary, maximum reliability is required, or the RF environment is heavily congested. Wired microphones never have battery failures, never experience RF dropouts, and deliver the lowest possible noise floor.

Use a wireless system when freedom of movement is required, stage aesthetics demand no visible cables, or the application makes cable management impractical (such as conference delegates or roving interviewers). The URX Series is designed for exactly these applications.

A conference system is a dedicated delegate microphone network designed for structured discussion environments such as boardrooms, government chambers, and multi-delegate meetings. Each delegate unit has its own microphone and typically a speaker, with a central controller managing who can speak and in what order.

Key differences from a PA system: conference units feature automatic microphone management (so all 50 delegates cannot speak simultaneously and create feedback), and they are typically integrated with interpretation, recording, and video conferencing systems. The K-Audio Pro SXA (wired) and SXW (wireless) systems are designed for permanent boardroom and government chamber installations.

Wired systems (SXA Series) are the preferred choice for permanent installations in fixed conference rooms and government chambers. They are more reliable, require no battery management, and are not subject to RF interference. The cable infrastructure can be concealed under the table or through floor conduit for a clean installation.

Wireless systems (SXW Series) are better for multipurpose rooms that need to convert quickly between conference and event use, or for venues where running cable infrastructure is cost-prohibitive. The SXW2100 offers UHF operation for stability in multi-unit deployments.

The K-Audio Pro SXA Series supports configurations from 4 up to 120+ delegate units on a single controller. The SXA4800 handles up to 48 delegates; the SXA8888 manages up to 88 delegate positions. For larger chambers requiring more than 120 delegates, cascaded controller configurations are available.

Contact K-Audio Pro with your delegate count, room dimensions, and integration requirements (recording, video, interpretation) for a tailored system design and pricing.

K-Audio Pro operates on an enquiry-based pricing model to ensure each customer receives an accurate quote for their specific requirements — system configuration, quantity, and application all affect final pricing. To receive a detailed quote, submit an enquiry or email info@kaudiopro.com with your equipment list and delivery location. Detailed quotes are provided within 24 hours.

Yes. K-Audio Pro provides worldwide distribution. Products are shipped via professional freight carriers with full export documentation. Import duties and customs clearance in the destination country are the responsibility of the buyer. K-Audio Pro can advise on typical customs classifications and duty rates for professional audio equipment in most markets.

For large system orders requiring on-site commissioning, K-Audio Pro can coordinate installation support in most regions.

K-Audio Pro products are backed by a standard warranty covering manufacturing defects. Professional after-sales support is provided via email and telephone for all registered customers. Technical documentation, including speaker data sheets and wiring diagrams, is available for all products in the collection.

For warranty claims or technical support, contact info@kaudiopro.com with your order reference and a description of the issue.

Yes. K-Audio Pro provides end-to-end system design for venues including arenas, houses of worship, theatres, conference facilities, and touring productions. The process includes acoustic analysis, speaker placement modelling, amplifier and signal chain specification, and a full equipment list with itemised pricing.

To initiate a system design consultation, send an enquiry with your venue type, dimensions, maximum occupancy, and intended use (music, speech, or both).