Line Array: A Complete Buyer's Guide

Buying a line array is a different process from buying most PA gear. The variables are more numerous, the amplification and processing requirements are often sold separately, and the difference between a good purchase and a costly mistake is usually a matter of matching the system properly to the application. Here is what to look for at each stage.

Define the Application First

Before looking at any specific product, be clear about what you need it to do. A system for a 300-capacity club differs fundamentally from one for a 5,000-seat outdoor festival or a fixed installation in a large church. The key questions: How large is the audience area? Is the system flown or ground-stacked? What SPL is required? Is music or speech the priority? Will it need to move regularly? Self-powered systems suit mobile applications; passive systems suit fixed installs where amplifiers can be housed permanently.

Budget Tiers Explained

At the entry level (£2,000–£6,000 for a usable stereo pair with sub), compact self-powered systems from QSC (KLA series), RCF (HDL series), and LD Systems (CURV 500) cover small clubs, conference rooms, and event hire. These are genuine line array systems with real directional control — not just columns — but they operate at shorter throw distances and lower SPL than professional touring systems.

Mid-market systems (£8,000–£25,000 per side depending on configuration) include the dB Technologies DVA range, Nexo's Geo M range, and EAW's KF range. These suit regional touring acts, theatre installs, and larger houses of worship. Most are self-powered, though some configurations use separate amplifiers. They offer a substantial step up in SPL and throw over entry-level products.

Professional touring systems — L-Acoustics KARA, d&b audiotechnik V-Series, Adamson IS Series — are what you find on full productions at 1,000+ capacity venues. These are typically passive, requiring dedicated amplifier racks with proprietary DSP. The cost is high but the performance is unmatched and they are built to withstand years of touring. Buying used is common and reasonable with these systems, provided the elements are in good condition and the firmware is current.

Self-Powered vs. Passive

Self-powered line array systems include the amplifier and DSP within each element. They are simpler to deploy, easier for smaller operations to maintain, and require less additional investment. The trade-off is weight per element (amplifiers add bulk) and the fact that a failed amplifier module takes out an element until repaired. Passive systems need external amplification matched to the manufacturer's specification — typically proprietary amps with the DSP baked in. More to carry, but the amps are serviceable separately and the system is often more configurable.

What to Check Before Buying Used

Used professional gear is a sensible option if you know what to check. Inspect HF drivers carefully — these are the most commonly damaged elements and replacements are expensive. Check the rigging hardware for wear, cracks, or missing safety pins. Verify the firmware version is current if the system uses DSP-linked amplifiers. Ask for a test rig where you can hear the system under power before committing. Reputable used dealers specialising in pro audio are safer than general auction sites for gear at this level.

Matching the System to the Venue

Line array length matters: more elements provide narrower vertical coverage and greater throw. A six-element array that works well in a medium club will not cover an audience 80 metres deep adequately — you need more elements or supplemental delay systems. Horizontal coverage must match the room's width; systems with adjustable horizontal waveguides (some professional systems allow switching between 70 and 120 degrees) offer more flexibility across different venues. Subwoofers are almost always necessary for music applications — budget for them from the start.

If you're new to the format, line array for beginners explains the fundamentals before you commit to a purchase. The best options at different price points are covered in the best systems for the money. For a full technical overview, the ultimate guide to line arrays covers the physics and specifications in detail.

The Honest Summary

Matching the system to the application is the single most important factor in any purchase decision. Overspending on capability you don't need wastes money; underspending on SPL or throw produces a system that won't do the job. Get the application right, then find the system that meets it at the right price. Used professional gear from reputable sources is often the best value proposition for buyers who can verify condition.

Frequently Asked Questions