4-Channel Full-Range Class-D Amplifier 4000W RMS DS18 FRP-4K4

• Powerful Full-Range Output: Delivers up to 4000W RMS across 4 channels for clean, consistent performance on full-range, mid-bass, or pro audio setups.
• Compact & Efficient Design: Class-D technology with a 4-layer PCB and smart cooling fan provides high efficiency (97%) while keeping heat under control.
• Complete Audio Control: Adjustable HPF, LPF, and Full crossover with 0–12dB bass boost at 50Hz lets you fine-tune your sound to perfection.
• Built for Reliability: Features Power, Protect, and Clip LED indicators, 0GA terminals, and multiple protection circuits for stable long-term use.
• Easy Installation: Compact chassis (13.4" x 5.5" x 2.4") fits tight spaces while delivering massive power and clarity for any audio system.

4-Channel Full-Range Class-D Amplifier 4000W RMS DS18 FRP-4K4

This listing includes:

• (1) DS18 FRP-4K4 4-Channel Full-Range Amplifier


• User Manual

The DS18 FRP-4K4 Compact 4-Channel Full-Range Class-D Amplifier packs serious power in a sleek, space-saving design. Engineered for performance and flexibility, this amp delivers up to 4000W RMS with precision control over your entire sound system.

Key Features:

• RMS Power: 4 x 400W @ 4 Ohms, 4 x 700W @ 2 Ohms, 4 x 1000W @ 1 Ohms


• Bridged Power: 2 x 1200W @ 4 Ohms - 2 x 1800W @ 2 Ohms


• Selectable HPF / LPF / Full crossover with 0 - 12dB Bass Boost @ 50Hz


• Smart cooling fan with 4-layer PCB design for reliable performance


• Power, Protect, and Clip LED indicators for real-time system status

Specifications:

• Frequency Response: 10Hz - 20KHz


• Signal to Noise Ratio: 90dB


• Efficiency @ 4 Ohms : 97%


• THD: 0.5%


• Damping Factor: 90


• Input Impedance: 10K Ohm


• Crossover Range: 10Hz - 2KHz


• Input Voltage: 400mV - 6V


• Fuse Size (Recommended): 500A


• Cooling: Smart Cooling Fan

Dimensions:

• Length: 13.4 in


• Width: 5.5 in


• Height: 2.4 in


• Weight: 7 lbs (3.2 kg)

High-performance audio builds that demand maximum output in a compact footprint. Ideal for cars, motorcycles, and custom sound setups needing clean, reliable full-range power.

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.