---
product_id: 659816431
title: "SP 4.900 4-Channel Marine Amplifier 1000W Class D for Car Boat Motorcycle"
brand: "hertz"
price: "839790 Ft"
currency: HUF
in_stock: true
reviews_count: 5
category: "Hertz"
url: https://www.desertcart.hu/products/659816431-sp-4-900-4-channel-marine-amplifier-1000w-class-d
store_origin: HU
region: Hungary
---

# 85% efficiency ADC output IP55 moisture protection 160W x 4 RMS power SP 4.900 4-Channel Marine Amplifier 1000W Class D for Car Boat Motorcycle

**Brand:** hertz
**Price:** 839790 Ft
**Availability:** ✅ In Stock

## Summary

> ⚡ Unleash powerful sound anywhere — compact, efficient, and built to brave the elements!

## Quick Answers

- **What is this?** SP 4.900 4-Channel Marine Amplifier 1000W Class D for Car Boat Motorcycle by hertz
- **How much does it cost?** 839790 Ft with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hu](https://www.desertcart.hu/products/659816431-sp-4-900-4-channel-marine-amplifier-1000w-class-d)

## Best For

- hertz enthusiasts

## Why This Product

- Trusted hertz brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact Yet Mighty:** Ultra-compact design (211.6 x 130 mm) fits effortlessly under seats or tight spaces without compromising power.
- • **Next-Gen Efficiency:** Advanced Class D ADC output stage ensures up to 85% power efficiency, maximizing performance without draining your battery.
- • **Power Meets Precision:** Delivers a robust 160W x 4 RMS with crystal-clear sound clarity for your marine or automotive setup.
- • **Built for the Elements:** IP55-rated aluminum housing shields your amp from moisture and corrosion, perfect for boats, motorcycles, and outdoor adventures.
- • **Seamless OEM Integration:** Universal Speaker Simulators (USS) enable flawless compatibility with factory audio systems featuring load detection.

## Overview

The Hertz SP 4.900 is a high-performance 4-channel marine amplifier delivering 160W RMS per channel at 4Ω with an advanced Class D ADC output stage achieving 85% efficiency. Its IP55-rated aluminum housing protects against moisture and corrosion, making it ideal for marine, motorcycle, and automotive use. Compact dimensions and universal speaker simulators ensure easy installation and seamless integration with OEM audio systems.

## Description

SP 4.900 is the first Hertz amplifier with the new Hertz ADC output stage (Advanced D-Class) that achieves an efficiency of 85% and delivers impressive power of 160 x 4 (4Ω) W RMS or 500 W x 2 (4Ω) W RMS bridge with an ultra-compact size of 211.6 (8 (8 8 ,3 ) x 1 30 (5.1) mm (in). Thanks to its ultra-compact performance, the SP 4.900 is the ideal choice for motorcycle applications and underseat installations in sports cars and trucks.

Review: This is a great amp, first one I got didn't work, and they wouldn't just replace it, I had to buy another and return the broken one for a VERY LENGTHY refund. The replacement that I bought does work and works VERY well. Great sound!!
Review: Amp is outstanding. I installed wet sound speakers in back and CICADA speakers in front and the sound is unbelievable. Clear, crisp and bass. Now it turns heads riding down the ride

## Features

- 1. Up to 85% efficiency thanks to ADC output stage (advanced class D)
- 2. USS (Universal Speakers Simulators) allows the SP 4,900 to work with OEM sources equipped with the "Load Detection" circuit
- 3. 160 x 4 (4Ω) with ultra-compact dimensions (211.6 x 130 mm)
- 4. IP55 aluminium housing for maximum protection against moisture and external influences
- 5. No fan to avoid the internal accumulation of dirt. 6. Sealed power cable, line inputs and speaker outputs to prevent oxidation. 7. Single sided filters and controls for easy calibration when product is installed

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B1VRSGS2 |
| Item model number | SP-4.900 |
| Manufacturer | Hertz |
| Package Dimensions | 33 x 21.7 x 8.6 cm; 2.15 kg |

## Product Details

- **Manufacturer:** Hertz
- **Maximum supply voltage:** 15 Volts (DC)
- **Minimum supply voltage:** 11 Volts (DC)
- **Mounting type:** Surface Mount
- **Voltage:** 15 Volts (DC)

## Images

![SP 4.900 4-Channel Marine Amplifier 1000W Class D for Car Boat Motorcycle - Image 1](https://m.media-amazon.com/images/I/71xVI0Q34WL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by S***N on 15 December 2025*

This is a great amp, first one I got didn't work, and they wouldn't just replace it, I had to buy another and return the broken one for a VERY LENGTHY refund. The replacement that I bought does work and works VERY well. Great sound!!

### ⭐⭐⭐⭐⭐ Review
*by S***S on 28 August 2024*

Amp is outstanding. I installed wet sound speakers in back and CICADA speakers in front and the sound is unbelievable. Clear, crisp and bass. Now it turns heads riding down the ride

### ⭐⭐⭐⭐⭐ Review
*by A***R on 14 June 2024*

10 out of 10 hands down. Best amp I’ve ever purchased

## Frequently Bought Together

- Hertz SPL Show SP 4.900 D-Class 4 Channel Amplifier 250 WRMS x 4 at 2Ω (IP55 Rated)
- Hertz SPL Show Series SX-165-NEO 6.5" Two-Way SPL Coaxial Speakers with Neo Magnets and UV/Waterproofing
- Hertz SPL Show Series SX-690-NEO 6x9 Three-Way SPL Coaxial Speakers with Neo Magnets and UV/Waterproofing

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**Shop now:** [https://www.desertcart.hu/products/659816431-sp-4-900-4-channel-marine-amplifier-1000w-class-d](https://www.desertcart.hu/products/659816431-sp-4-900-4-channel-marine-amplifier-1000w-class-d)

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*Product available on Desertcart Hungary*
*Store origin: HU*
*Last updated: 2026-03-14*