115 Watts RMS 5-CH 1 Ohm Stable Class D Car Audio Amplifier GT5X Massive Audio

• All-in-One 5-Channel Powerhouse: Drive your entire system with one amp—115W x 4 for mids/highs + 300W x 1 for subs at 2 Ohm, or up to 510W RMS at 1 Ohm for deep, controlled bass.
• Next-Gen Class D Design: Ultra-efficient digital circuitry with Massive Audio’s exclusive "Massive Core" power supply delivers high-speed, high-fidelity performance in a compact footprint.
• 1 Ohm Stable Subwoofer Channel: Push powerful low-end without fear—this amp is stable down to 1 Ohm on the sub channel, ideal for heavy-hitting daily drivers and bass builds.
• Built for Clean, Reliable Sound: Features built-in noise filtering, advanced 5-way protection, and high-grade MOSFET switching for distortion-free audio and long-term durability.
• Compact and Install-Ready: Small enough to fit almost anywhere (7” x 1.65” x 7.9”) with auto turn-on, gain remote, and 12V remote output for seamless integration into any custom car audio setup.

115 Watts RMS 5-CH  1 Ohm Stable Class D Car Audio Amplifier GT5X Massive Audio

This listing includes:

• (1) Massive Audio GT Series 5-Channel Amplifier


• (1) Mounting Hardware Kit


• (1) User Manual

Step into the next generation of high-performance sound with the Massive Audio GT5X 5-Channel Amplifier. Engineered with the brand’s proprietary Massive Core Power Supply, this compact beast pushes clean, undistorted sound across five channels—handling everything from crisp highs to booming lows with ease.

Designed for serious audiophiles and pro installers alike, the GT5X packs premium features like 1-ohm stable operation, built-in noise reduction, and next-gen 5-way protection circuitry into a rugged and ultra-efficient build. Whether you're running full-range speakers or a demanding subwoofer, this amp delivers reliable power and headroom to drive your system without breaking a sweat.

Key Features:

• Class D Digital Design: Efficient power delivery and reduced heat


• Massive Core Technology: Oversized toroids and transformers for stable current


• 1 Ohm Stable Sub Channel: Ideal for demanding subwoofer setups


• 5-Channel Flexibility: Power your entire system with one amp


• Built-in Noise Reduction: For clean, interference-free audio


• Auto Turn-On via RCA: Convenient signal-sensing startup


• MOSFET Switching: High-speed, high-grade switching components


• Advanced 5-Way Protection: Keeps your system safe under all conditions


• Clip LED Indicator: Prevents distortion and amp clipping


• Gain Remote Included: On-the-fly control of subwoofer gain

Specifications:

• RMS Power @ 2 Ohm: 120W x 4


• RMS Power @ 4 Ohm: 75W x 4


• RMS Bridged @ 4 Ohm: 230W x 2


• Minimum Load: 2 Ohm


• Frequency Response: 10Hz – 40kHz


• Low Pass Frequency Range: 20Hz – 500Hz


• Input Level: 310mV – 7V


• Signal-to-Noise Ratio: 94dB


• Channel Separation: 58dB


• THD @ 4 Ohm: 0.06%


• Bass Boost: N/A


• Recommended Fuse: 80A


• Input Terminal Size: 4 AWG


• Gain Remote: Not Included

Specifications:

• RMS Power (2 Ohm): 115W x 4 + 300W x 1


• RMS Power (4 Ohm): 75W x 4 + 190W x 1


• Subwoofer Output (1 Ohm): 510W RMS


• Input Voltage Range: 320mV – 7V


• Frequency Response: 10Hz – 200Hz (Sub) / 10Hz – 40kHz (Full Range)


• Low Pass Filter Range: 80Hz – 200Hz


• Channel Separation: 55dB


• Total Harmonic Distortion (4 Ohm): 0.08%


• Signal-to-Noise Ratio: 91dB


• Bass Boost: -3dB to +12dB


• Minimum Load: 1 Ohm (Mono), 2 Ohm (Multi-channel)


• Recommended Power Input: 4 AWG

Dimensions:

• Width:  7"


• Height: 1.65"


• Length: 7.9"

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.