The QED QX16/4 LSZH is a four-core installation speaker cable from QED's Professional range — a series of high-quality cables and accessories designed specifically for professional installers building multi-room audio and home cinema systems. The QX16/4 uses 16 AWG high-purity copper conductors in a stranded 30/0.25 construction, delivering low resistance (13.3 Ω/km) that maintains performance even on longer cable runs typical of whole-house installations.
LSZH Fire-Rated Construction
The defining feature of this cable is its LSZH (Low Smoke Zero Halogen) jacket. Unlike standard PVC-sheathed cables, LSZH compounds produce very little smoke and no halogen toxins in the event of a fire — a critical requirement for installations in commercial premises, public buildings, and residential properties where building regulations mandate low-smoke cabling. The cable carries full LSZH fire-rating certification with a CPR Declaration of Performance available from QED.
Four-Core Design
The /4 designation indicates a four-core cable with colour-coded conductor sheaths in red, black, white, and green. This allows bi-wire or bi-amp speaker connections from a single cable pull — running separate high-frequency and low-frequency signals to compatible speakers without needing two separate cable runs. For standard two-wire connections, the spare pair can be left unused or the conductors can be doubled up for reduced resistance on longer runs.
Installation Features
This 300-metre reel is designed for large-scale installation projects. The cable is sequentially metre-marked with a countdown system, so installers always know exactly how much cable remains on the reel. The pink jacket colour is the standard LSZH identification colour, distinguishing it from the white PVC and black PE outdoor variants in the QX16 range. The cable is RoHS2 compliant.
QX16 Range
The QX16 series is available in three jacket types to suit different installation environments: LSZH (pink) for fire-rated indoor installations, PVC (white) for standard indoor use where LSZH is not specified, and PE (black) for outdoor installations with UV and water resistance. Each jacket type is available in both two-core (/2) and four-core (/4) configurations, and in 100-metre box or 300-metre reel packaging.
| Conductor Size | 16 AWG |
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| Conductor Construction | 30/0.25 stranded |
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| Conductor Resistance | 13.3 Ω/km |
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| Stranded Diameter | 1.57mm |
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| Number of Cores | 4 (Red, Black, White, Green) |
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| Jacket Material | LSZH (Low Smoke Zero Halogen) |
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| Outside Diameter | 7.20mm |
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| Jacket Colour | Pink |
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| Weight | 98 kg/km |
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| Reel Length | 300m |
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| Metre Marking | Sequential countdown |
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| Compliance | RoHS2, LSZH fire-rated |
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