Ignitions and Electrical› Ignition Boxes and Components

Belva

4000W Class-D Monoblock Amplifier

$229.95

SKU: BXD4K

In Stock
In Stock
Ships by Sep 12
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Belva BXD4K is a 4000W peak power Class-D monoblock amplifier designed for car audio systems. It features 1-ohm stable operation and a MOSFET power supply. The amplifier includes a variable Bass EQ for precise tuning and both high-level and low-level inputs for versatile connectivity.
Show original supplier description
The Belva BXD4K is a 4000W peak power, 1-ohm stable, Class-D monoblock car audio amplifier. It boasts a highly efficient Class D design, utilizing MOSFET transistors to achieve an efficiency rate of 90%, which is significantly higher than traditional Class AB amplifiers. This translates to less energy lost as heat and more power delivered to your subwoofers. This amplifier is rated at 1000 watts RMS at 4 ohms, 2000 watts RMS at 2 ohms, and a massive 4000 watts RMS at 1 ohm. It features a Pulse Width Modulated MOSFET power supply for stable power delivery and a wired remote bass level control, allowing you to adjust your bass on the fly. The BX-Series includes a variable Bass EQ, offering more precise control over your low-end frequencies compared to standard fixed bass boost switches. Connectivity is made simple with both high-level (speaker-level) and low-level (RCA) inputs, ensuring compatibility with virtually any head unit or source. It also includes a 3-way protection circuit for safety and an LED indicator for power and protect status.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandBelva
Part NumberBXD4K
CategoryIgnitions and Electrical

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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