Search  for anything...

Sundown Audio SIA-3500v2 Monoblock 3500W RMS Amplifier

Based on 12 reviews
Condition: New
Checking for inventory...

Notify me when this product is back in stock

$424.99

Buy Now, Pay Later


As low as / mo
  • – Up to 36-month term if approved
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: Unavailable
Fulfilled by Sundown Audio

Available payment plans shown during checkout

At a glance

Condition
New
Wattage
3500 Watts
Model
SIA-3500v2
Weight
8 lb
Built-In Media
wired remote with clipping indicator
Item Type Name
SIA-3500D v2
Warranty
2 Year Warranty

Features 5

  • MASSIVE POWER OUTPUT: Experience ground-shaking performance with the SIA-3500v2, delivering a colossal 3500W RMS @ 1 Ohm, 3300W @ 2 Ohms, and 2600W @ 4 Ohms. This intelligent full-bridge monoblock amplifier provides immense, stable power for competition-level subwoofers or high-demand pro audio setups in a compact 2.68 x 8.86 x 10.43 design.
  • PRECISE AUDIO CONTROL: Fine-tune your sound with extreme precision. Features variable 12dB Low Pass (40Hz-20kHz) and High Pass (10Hz-1kHz) filters, a powerful 12dB Bass Boost @ 50Hz, and a crucial Subsonic Filter, ensuring clean, optimized bass and full-range output without distortion.
  • ADVANCED COOLING SYSTEM: Engineered for relentless, all-day performance, the SIA-3500v2 incorporates an advanced 3-speed Smart Cooling fan and heavy-duty heatsink. This superior thermal management prevents overheating and ensures stable, high-quality output, even under extreme conditions.
  • COMPREHENSIVE PROTECTION: Drive with absolute confidence thanks to integrated multi-point protection circuitry. Thermal, voltage, speaker short, and DC-offset protection safeguard your amplifier and connected components from potential damage, ensuring long-term reliability and consistent powerful sound.

Description

Sundown Audio SIA-3500v2 Monoblock Amplifier: World Champion Power & Unwavering Stability for Elite Car AudioUnleash the full, breathtaking potential of your car audio system with the Sundown Audio SIA-3500v2 Monoblock Amplifier. As part of the "Smart Full Bridge" (SIA) series, this high-quality amplifier is built with extreme power and unwavering stability at its core. Meticulously engineered by the world champions of bass, it's designed to deliver unparalleled performance for the most demanding subwoofers and high- power full-range applications, ready to "bang all day long." The SIA-3500v2 sets a new standard for professional-grade car audio amplification, offering raw power without compromise.πŒπ€π’π’πˆπ•π„ ππŽπ–π„π‘ πŽπ”π“ππ”π“: The SIA-3500v2 is a true powerhouse, offering colossal, consistent output for extreme demands:3,500 Watts RMS x 1 @ 1 Ohm3,300 Watts RMS x 1 @ 2 Ohms2,600 Watts RMS x 1 @ 4 Ohms This tremendous power delivery at various impedances ensures your speakers receive the robust energy they need for dynamic and impactful sound, whether for deep bass or wide-range pro audio. All this immense power is housed within an incredibly compact design, with dimensions of just 2.68” x 8.86” x 10.43” (HxWxL), making it versatile for installation in nearly any vehicle, from tight spaces to custom competition builds.ππ‘π„π‚πˆπ’π„ π€π”πƒπˆπŽ π‚πŽππ“π‘πŽπ‹: Achieve perfect sound optimization with the SIA-3500v2's comprehensive and intuitive audio control features:Variable 12dB Low Pass Filter (40Hz-20kHz): Finely sculpt your bass frequencies or integrate full-range speakers seamlessly.Variable 12dB High Pass Filter (10Hz-1kHz): Optimize mid-range and high-frequency speaker performance, preventing distortion from unwanted low frequencies.Variable 12dB Bass Boost @ 50Hz: Dial in the ideal amount of impactful low-end punch for your preferred listening experience, adding depth and richness.Dedicated Subsonic Filter: Crucially ensures only the most essential low frequencies reach your subwoofer, protecting it from damaging ultra-low frequencies and delivering cleaner, tighter, more defined bass.𝐀𝐃𝐕𝐀𝐍𝐂𝐄𝐃 π‚πŽπŽπ‹πˆππ† π’π˜π’π“π„πŒ: Designed for relentless, high-performance operation, the SIA-3500v2 features a superior thermal management system. It incorporates a heavy-duty heatsink for outstanding passive cooling, complemented by an Advanced 3-speed Smart Cooling fan design. This intelligent fan actively adjusts its speed to maintain optimal operating temperatures, preventing overheating and ensuring stable, undistorted output even during prolonged, demanding use – a critical factor for maintaining sound quality and amplifier longevity.π‚πŽπŒππ‘π„π‡π„ππ’πˆπ•π„ ππ‘πŽπ“π„π‚π“πˆπŽπ: Drive with absolute confidence. The SIA-3500v2 is equipped with robust, integrated 4-way protection circuitry to safeguard your investment and your entire audio system:Thermal Protection: Automatically shuts down if it gets too hot.Voltage Protection: Protects against over or under-voltage conditions (Working Voltage: 10.5V – 15.5V DC).Speaker Short Protection: Prevents damage from wiring faults.DC-Offset Protection: Shields speakers from harmful DC currents. These critical features, alongside clear power and protection indicators, ensure long-term reliability and peace of mind. A Recommended Fuse Rating of 300A provides further robust safety.𝐔𝐒𝐄𝐑-π…π‘πˆπ„π§πƒπ‹π˜ π‚πŽππ“π‘πŽπ‹: The included wired remote control makes optimizing your audio incredibly convenient. It features a crucial clipping indicator, allowing for real-time monitoring of your signal to prevent distortion and damage to your speakers. With an Input Sensitivity of 5V Max and an exceptional Single Noise Ratio of 108dB, the SIA-3500v2 ensures a clean, powerful, and easily managed audio experience, giving you full command over your sound.The Sundown Audio SIA-3500v2 is a high-quality, intelligent full-bridge amplifier offering professional-grade power and features in a compact, reliable package, making it the ultimate choice for enhancing your car audio system.

Specs 8

Manufacturer Sundown Audio
Brand Sundown Audio
Number of Items 1
Built-In Media wired remote with clipping indicator
Item Type Name SIA-3500D v2
Item Weight 8 pounds
Model Number SIA-3500v2
Mfr Part Number SIA-3500v2

Frequently asked questions

This product is currently out of stock. Please check back later for shipping info.

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


Great amp
Wattage: 3500 Watts
Great amp. Bought for our son. He is very happy.
Reviewed in the United States on March 6, 2025 by Steve D.

Malo
Wattage: 3500 Watts
No sirve se quemΓ³ y ni siquiera durΓ³ 15 dΓ­as
Reviewed in the United States on July 28, 2026 by Daniel Damian

Spend your money wisely don't just read what it says and go off of that this is BS
Wattage: 3500 Watts
It says it's a 3500 watt RMS amp amp but this is not a 3500 watt RMS amp. This does not pull out the pressure like it's supposed to 3500 Watts it's supposed to sound way better than this this sounds like a 1500 watt amp very poor. I didn't like it the bill quality was not all there the durability was very heavy so I guess it was strong enough the heat the amp never really got hot because it wasn't doing anything not worth the value of your money ... show more
Reviewed in the United States on May 6, 2025 by Rachel Benedict
Checking for inventory...