220 Watts RMS 2 Ohm 4-CH Class D Digital Car Audio Amplifier Massive Audio GTR4X

• Powerful 4-Channel Output: 220W x 4 @ 2 Ohm or 430W x 2 bridged @ 4 Ohm - ideal for mids and highs
• Ultra-Compact Build: Small but mighty at just 5.9” x 2.16” x 7” for tight or hidden installs
• Engineered with Massive Core Tech: Oversized toroids & high-speed switching for stable, clean power
• Smart Install Features: Auto RCA turn-on, clip LED, and noise suppression built-in
• Built for Longevity: 4-layer thermal-balanced PCB and next-gen protection circuitry ensure long-term use

220 Watts RMS 2 Ohm 4-CH Class D Digital Car Audio Amplifier Massive Audio GTR4X

Included Items:

• (1) Massive Audio GTR4X 4-Channel Class D Amplifier


• (1) Mounting Hardware Kit


• (1) User Manual

The Massive Audio GTR4X 4-Channel Amplifier is engineered to redefine what compact car amps can do. Pushing 220 Watts RMS per channel at 2 Ohm, this ultra - efficient Class D amp delivers clean, pure sound to your mids and highs - Perfect for daily drivers, show builds, or full-range systems that demand both power and clarity.

Built with Massive Audio’s exclusive "Massive Core" power supply, the GTR4X features oversized toroids and transformers, ensuring headroom and current delivery that outperforms amps twice its size. The internal layout is built for reliability, using 4-layered PCBs and SMD parts tested as they’re placed to minimize distortion and maintain even temperature across the board.

From smart auto turn-on via RCA inputs to built-in noise reduction and next-gen 5-way protection, this amp is made for clean installs, consistent power, and years of worry-free use.

Key Features:

• Class D Digital 4-Channel Amp: 220W x 4 @ 2 Ohm, 120W x 4 @ 4 Ohm, or 430W x 2 Bridged @ 4 Ohm


• Massive Core Power Supply: Oversized toroids + transformers for stable, high-output current


• Auto RCA Turn-On: Clean installation without remote wire in Hi-Level applications


• Full MOSFET Switching: High-grade, high-speed efficiency with minimal heat


• Built-In Noise Reduction: Keeps your audio clean and interference-free


• Compact Design: Fits tight spaces at just 5.9" x 2.16" x 7"


• 4 AWG Power Input: Built to feed serious current


• Clip LED Indicator: Visual aid to prevent distortion and overpowering

Specifications:

• RMS @ 2 Ohm: 220W x 4


• RMS @ 4 Ohm: 120W x 4


• Bridged RMS @ 4 Ohm: 430W x 2


• Minimum Load: 2 Ohm


• Input Sensitivity: 310mV - 7V


• Frequency Response: 10Hz - 31kHz


• Low Pass Filter Range: 20Hz - 3kHz


• Channel Separation: 55dB


• THD @ 4 Ohm: 0.08%


• Signal-to-Noise Ratio: 91dB


• Bass Boost: N/A

Dimensions:

• Width; 5.9"


• Height: 2.16"


• Length: 7"

Shipping Dimensions:

• Approx. Package Size: 8" x 3" x 8.5"


• Shipping Weight: Approx. 5.5 lbs

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.