Used QSC 600-HP Subwoofer: Buying Guide and Condition Notes

The QSC 600-HP is a dual 15" subwoofer aimed at rental and install work where output and reliability matter more than cosmetics. For distributors and rental companies sourcing used QSC 600-HP for sale, the key question is not whether the cabinet works on arrival, but whether it will survive a season of touring or fixed install use. This guide covers what to check before you commit.

On paper the unit carries 2 x 15" drivers, 1200 W power handling, a 45 Hz – 2 kHz frequency range, 132 dB max SPL, 4 Ω impedance and Neutrik NL4 connectors. Dimensions are 600 × 450 × 450 mm at 45 kg, with 90° H × 60° V coverage. Treat these figures as the reference point for matching amplifiers and DSP presets, not as a substitute for a physical inspection. Year of manufacture is available on request, so ask for it before quoting. Venue owners weighing these cabinets against a full club sound system should confirm the room's low-end needs before finalising the order.

Condition grade A is the practical benchmark here. On a used subwoofer that means the cabinet should be structurally sound with no soft corners, no water swelling and no evidence of driver removal that was not properly resealed. Check the grille for impact damage, confirm both drivers move freely and evenly by hand, and listen for rub or scraping. Inspect the NL4 connectors for corrosion or loose pins, and confirm the impedance reads close to 4 Ω on each cabinet.

For rental fleets, the 45 kg weight and 600 mm width affect truck packing and two-person handling, so factor that into your logistics. Buyers comparing options across the range should review the wider used pro audio subwoofers category before committing to a single model, since cabinet size and coverage angle often decide which unit suits a given venue better than raw SPL figures.

Venue owners and system integrators should match the 90° H × 60° V coverage to the room before buying. In low-ceiling clubs or compact live rooms, a wider pattern can cause more boundary interaction than a narrower box, and the 45 Hz low-end limit means you should confirm the program material actually needs sub extension below that point. If the install is fixed, ask for photos of the rear panel and connector plate, not just the front grille.

This listing shows two units available, which suits buyers wanting a matched pair for stereo sub deployment. For export orders, request clear photos of drivers, cabinet edges and connectors, and confirm packing method before shipment. Distributors building a mixed container should also browse the full used pro audio equipment for export range to consolidate freight, and rental companies adding front-end inventory can pair subwoofers with second hand digital mixing consoles from the same source.

Finally, treat grade A as a starting claim, not a guarantee. Ask for the year of manufacture, service history if available, and whether the drivers are original. Confirm amplifier and DSP presets match the 1200 W / 4 Ω rating before you power them up, and test at low level first. A short, documented inspection protects both sides of a B2B transaction and keeps the units working in the field.

Comparing options or ready to price a unit? Request a quote with your destination country and quantity.