Cadence 900 Watt 2-Ohm 5-Channel Class D Car Audio Amplifier QR80.5

• Versatile 5/4/3/2 Channel Design – Easily power a full system, multi-speaker setup, or bridge channels for powerful subwoofer output, all from one amplifier.
• Dynamic Class D Efficiency – Enjoy clean, high-powered sound with advanced MOSFET circuitry and superior heat management for long-lasting performance.
• Precision Audio Control – Fine-tune your setup with adjustable HPF, LPF, bass boost (0–15dB), and phase control for perfectly balanced sound.
• Powerful and Compact Build – Delivers 900 watts RMS in a sleek aluminum chassis that fits tight installations without sacrificing performance.
• Reliable 4-Way Protection – Engineered with thermal, short circuit, DC, and overload protection for safe, consistent operation in any setup.

Cadence 900 Watt 2-Ohm 5-Channel Class D Car Audio Amplifier QR80.5

This Listing Includes:

• (1) Quartz Core QR80.5 5-Channel Class D Car Amplifier

The Quartz Resonance QR80.5 delivers power, flexibility, and precision in one compact amplifier. Designed for true audio enthusiasts, this 5/4/3/2 channel configuration gives you complete control to shape your ideal sound system. With 400 watts dedicated to your subwoofer channel and 80 watts per channel at 4 ohms, it balances depth, clarity, and punch. The QR80.5 embodies the perfect harmony of strength and refinement, offering studio-level sound in a sleek, compact body.

Specifications:

• Amplifier Type: Class D


• Channel Configuration: 5/4/3/2 Channels


• RMS Power @ 4 Ohms: 80 W x 4 + 400 W x 1


• RMS Power @ 2 Ohms: 125 W x 4 + 400 W x 1


• Frequency Response: 20 Hz - 36 kHz


• Input Sensitivity: 200 mV - 6 V


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


• Signal-to-Noise Ratio: > 90 dB


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


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


• Bass Boost: 0 - 15 dB


• Phase Control: 0 - 180


• Input Type: RCA


• Protection: Thermal, Short Circuit, DC Fault, Power Surge


• Construction: Silver-gray aluminum alloy heatsink


• Cooling System: Advanced MOSFET with efficient heat dissipation

Dimensions:

• Length: 13.94 in (354 mm)


• Width: 6.30 in (160 mm)


• Height: 2.05 in (52 mm)


• Weight: 9 lbs


• Shipping Dimensions: 17 x 11 x 5 in

Accepted Payment Methods at Big Jeff Audio

At Big Jeff Audio, we strive to make your shopping experience as smooth as possible by offering a wide variety of payment options. Below is a complete list of the payment methods we accept:

Credit and Debit Cards

• Visa
• Mastercard
• American Express
• Discover
• Diners Club

Digital Wallets

• Amazon Pay
• Apple Pay
• Meta Pay (formerly Facebook Pay)
• Google Pay
• Shop Pay
• PayPal

International Payment Methods

• Bancontact
• iDEAL

Bank Transfers

• Zelle

Financing Options

We also offer financing options to make purchasing easier. Learn more about our financing options here.

• Klarna
• Affirm
• Sezzle
• Snap
• Acima
• Tiptop

If you have any questions or need assistance with payments, feel free to reach out to us at info@bigjeffaudio.com or call us at 737-BIG-JEFF.

Shipping Options and Delivery Time

Do You Offer Expedited Shipping?

Yes! At checkout, you can select from different shipping options:

• Standard Shipping: Free for orders over $100.
• Expedited Shipping: Available at an additional cost, calculated based on the weight and destination of your order.

How Long Does Delivery Take?

• Handling Time: Most orders are processed and shipped within 1 business day after receiving cleared payment. Occasionally, additional handling time may be required, but we’ll notify you if that’s the case.
• Standard Shipping: Typically takes 3-5 business days, though delivery may be affected by extreme weather or holidays.

What Happens If My Package Is Undeliverable?

If your package is refused or marked undeliverable and returned to us by the carrier, you’ll need to pay the full shipping cost to have the package resent. Alternatively, we can refund your order, minus the cost of shipping.

Why Can’t I Track My Order?

If you're having trouble tracking your order:

• Make sure you’ve received the shipping confirmation email with the tracking number.
• Log into your account on our website and use the “Check Your Order Status” button.
• If the issue persists, please refer to our detailed guide on tracking your order or contact our customer service team for further assistance.