• Refined 4-Channel Power – Delivers up to 135 watts RMS per channel at 2 ohms or 270 watts bridged for a full, balanced audio system.
• Premium Class A/B Clarity – Offers rich, dynamic sound reproduction with detailed highs and smooth low-end response for audiophile-grade performance.
• Precision Sound Control – Adjustable HPF, LPF (50–250Hz), and Bass Boost up to +15dB at 45Hz for personalized tuning and sound shaping.
• Elegant and Durable Build – Black brushed aluminum chassis ensures strength, style, and superior heat dissipation under heavy use.
• Smart Protection System – Microprocessor-based real-time monitoring provides advanced protection from thermal, short circuit, overload, and DC faults.

Cadence 540 Watt 4-Channel 2-Ohm Class A/B Car Audio Amplifier QRS4.90GH

This Listing Includes:

• (1) Quartz Core QRS4.90GH 4-Channel Class A/B Car Amplifier

The Quartz Resonance Supreme QRS4.90GH brings elegance, versatility, and precision together in one refined amplifier. Designed for music lovers who crave clarity and control, this 4-channel powerhouse delivers up to 135 watts RMS per channel at 2 ohms or 270 watts bridged, providing the flexibility to drive speakers and subwoofers with authority. Its Class A/B architecture ensures warm, dynamic sound reproduction across the entire frequency range, while the black brushed aluminum chassis embodies both durability and sophistication. Engineered with advanced microprocessor protection and real-time monitoring, the QRS4.90GH offers reliability that matches its sound quality. From crystal-clear highs to deep, resonant lows, it delivers a truly immersive listening experience worthy of the Quartz Resonance Supreme name.

Specifications:

• Amplifier Type: Class A/B


• Channel Configuration: 4 Channels


• RMS Power @ 4 Ohms: 90 W x 4


• RMS Power @ 2 Ohms: 135 W x 4


• Bridged RMS Power @ 4 Ohms: 270 W x 2


• Frequency Response: 20 Hz - 30 kHz


• Input Sensitivity: 200 mV - 6 V


• Total Harmonic Distortion (T.H.D): < 0.05 %


• Signal-to-Noise Ratio: > 86 dB


• High-Pass Filter (HPF): 50 Hz - 250 Hz


• Low-Pass Filter (LPF): 50 Hz - 250 Hz


• Bass Boost: 0 - 15 dB @ 45 Hz


• Fuse Rating: 35 A x 2


• Input Type: RCA


• Operation Modes: Stereo, Bridge, or Tri-Mode


• Protection: Thermal, Short Circuit, Overload, DC Fault


• Construction: Black brushed aluminum heatsink


• Cooling System: Efficient heat dissipation with microprocessor monitoring

Dimensions:

• Length: 14.29 in (363 mm)


• Width: 7.56 in (192 mm)


• Height: 2.32 in (59 mm)


• Weight: 10 lbs


• Shipping Dimensions: 18 x 12 x 5 in