Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 9 - Jul 14
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Description
Massive Audio GTR4X GT Series Class-D Full-Range 4-Channel Amplifier 220W RMS x 4 @ 2-OhmMassive Audio GTR4X GT Series Compact Class D 4 Channel Amplifier 220 W RMS 4 @ 2 120 W 4 @ 4 430 W 2 Bridged @ 4 A high output, compact 4 channel amplifier built with Massive Audios Massive Core power tech. Designed for clean, efficient performance in small spaces, equipped with advanced protection and high fidelity signal handling. Key Features Power Output: 220 W RMS 4 @ 2 ; 120 W 4 @ 4 ; 430 W 2 Bridged @ 4 2 stable Class D platform with Massive
Massive Audio GTR4X – GT Series Compact Class-D 4-Channel Amplifier – 220 W RMS × 4 @ 2 Ω / 120 W × 4 @ 4 Ω / 430 W × 2 Bridged @ 4 ΩA high-output, compact 4-channel amplifier built with Massive Audio’s “Massive Core” power tech. Designed for clean, efficient performance in small spaces, equipped with advanced protection and high-fidelity signal handling.
Key Features
- Power Output: 220 W RMS × 4 @ 2 Ω; 120 W × 4 @ 4 Ω; 430 W × 2 Bridged @ 4 Ω
- 2 Ω stable Class-D platform with Massive Core power supply and oversized toroids
- Mil-Spec multilayer PCB, SMD components, full MOSFET switching
- Auto-sensing RCA turn-on, Clip LED, and comprehensive 5-way protection
- Input Sensitivity: 310 mV – 7 V; 10 Hz–31 kHz frequency response; 20 Hz–3 kHz low-pass filter; ~0.08% THD; 91 dB S/N ratio
- Minimum load: 2 Ω; Ultra-compact: 5.9″ × 2.16″ × 7″
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.6 ★★★★★
Based on 254 reviews
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Product Reviews
★★★★★ 5
Good product at a great price
Size: 16 AWG-100 ft
Used to wire my door speakers and it worked amazing
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Reviewed in the United States on May 21, 2026
★★★★★ 5
Smaller than the original, but works well.
When I received it, it was so small that I thought it was a toy, or maybe for some 4cyl engine. It is significantly smaller than the original one. When I looked closer, the mount holes did line up, so I tried it. I did have to get shorter mount bolts.
To my surprise, it works great! I don't know what the longevity will be, but it made it through a busy august!
Considering the price and how small it is, I might just buy a second one to keep on board. Just in case.
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Reviewed in the United States on September 14, 2025
★★★★★ 1
Warning!!!
I was so impressed after install!! Fired right up faster that it ever has in the past, had the boat out about 8 times and CACK!!! They say they will stand behind the product and replace it, but do I risk another day ruined on the river?
Btw, I have a Volvo penta 5.0 21.5' Larson I/O
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Reviewed in the United States on September 28, 2025
★★★★★ 5
Perfect fit and functioning. Excellent support
The starter fit perfectly, in my Mercruiser 4.3 from 2004, although it was awkward to replace on my engine due to space constraints. I had a few questions for the supplier and quickly received very descriptive answers. Now the starter works perfect in my boat. In all a very good choice which I really can recommend others.
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Reviewed in the United States on June 27, 2024
★★★★★ 5
New starter
Part came promptly and was a direct match to the original starter. I did a bench test prior to install and had no issues.
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Reviewed in the United States on July 16, 2025