How to Inspect Used Line Array Speakers Before You Buy

Buying used line array modules is mostly a mechanical inspection, not a listening test. A box can sound fine in a noisy warehouse and still have a bent rigging plate, a rubbing voice coil or a power module that fails after twenty minutes of real program material.

This is the routine we run on every cabinet before it is listed. You can use the same checklist when you inspect gear from another supplier.

1. Check the rigging before you power anything

Set the cabinet on a flat surface and move every rigging pin by hand. Pins should slide without tools and lock with a clear click. Look for ovalised holes, cracked cheek plates and replaced bolts of the wrong grade. On a line array, the rigging is a safety system: a cheap cabinet with damaged cheeks is not a bargain, it is a liability.

2. Inspect every cone and surround

Remove the grille if the design allows it. Push each cone gently and listen for scraping. Look for tears in the surround, rust on the basket and shiny glue lines that suggest a re-cone. A re-coned driver is not automatically bad, but it should be priced as a repaired unit, not as original.

3. Sweep the drivers, do not just tap them

A tap test finds a dead driver. A sweep from 40 Hz to 16 kHz at low level finds the ones that are on their way out. If you cannot sweep on site, ask for a sweep video recorded with the serial number visible.

4. Run the amplifier module under load

For active boxes, play pink noise at moderate level for at least thirty minutes. Touch the module heatsink: warm is normal, hot enough to be uncomfortable is not. Listen for fan bearing noise, which is the most common failure on older active cabinets.

5. Check the presets and firmware

Active line arrays depend on their internal presets. Confirm the firmware version, confirm the preset list matches the model, and check that nobody has loaded a home-made EQ curve to hide a failing driver. If the box uses an external amplifier with manufacturer presets, ask which preset file the seller used.

6. Look at the connectors and cable entries

XLR and powerCON sockets wear out. Wiggle each connector with a cable attached: it should not crackle or cut out. Bent pins are cheap to fix, cracked PCB pads are not.

7. Ask for the history

A cabinet from a fixed club install has a very different life from one that toured for six years. Ask where it was installed, how often it was moved and whether it was ever repaired. Sellers who answer precisely are usually telling the truth; sellers who answer vaguely are telling you something too.

8. Budget for the accessories

Fly bars, bumpers, link plates and transport covers are often sold separately. Price the full hang before comparing offers, otherwise a cheap cabinet becomes an expensive system.

If you would rather skip the inspection work, we publish test results for every module we sell, including sweep recordings and rigging notes. Start with our used RCF HDL 6-A modules for compact rooms, or the d&b V8 cabinets for larger halls.