QR80.2 | 2-Channel Class D Car Amplifier

⚠️ Closeout Item — Final Sale. All sales are final. Item is new unless otherwise noted.

We're clearing out our Cadence Quartz Resonance inventory and the QR80.2 is a great pickup at this price. This is a compact 2-channel Class D amplifier that punches well above its size — solid power output, clean signal, and enough tuning flexibility to work in a wide range of installs. At $85 (was $159.99), it's hard to beat for a front stage amp or a dedicated sub channel when bridged.

We've installed Cadence amps and the QR series is well-built — aluminum alloy heatsink, nickel-plated RCA inputs, and four-way protection circuitry. It's not a budget throwaway; it's a quality amp at a closeout price because we're done carrying the line.

Why We Like It

• 120W x2 @ 2 Ohm / 80W x2 @ 4 Ohm — real-world usable power for most front stage or component setups
• Bridgeable to 240W @ 4 Ohm — run it mono into a sub if needed
• Class D Efficiency — runs cool, draws less current, easier on your electrical system
• Adjustable HPF & LPF (50–250 Hz) — dial in crossover points without an external processor
• 0–15 dB Bass Boost — useful for sub applications when bridged
• 20 Hz – 36 kHz Frequency Response — full range, <0.05% THD, >90 dB S/N ratio
• Compact footprint: 7.48" x 6.30" x 2.05" — fits under seats, in trunks, tight enclosures
• Four-way protection — thermal, short circuit, DC fault, and power surge

Limited quantity. Once it's gone, it's gone — we won't be reordering this model.

Specifications