---
product_id: 78487996
title: "SS8P 400W 8\" Slim Under-Seat Active Subwoofer, High-Level Inputs, Cast Aluminum Enclosure, for Car/Truck Audio Systems"
brand: "rockville"
price: "2098 kr"
currency: DKK
in_stock: true
reviews_count: 9
category: "Rockville"
url: https://www.desertcart.dk/products/78487996-ss8p-400w-8-slim-under-seat-active-subwoofer-high-level
store_origin: DK
region: Denmark
---

# 2.8" slim profile 400W peak power Built-in amp & remote control SS8P 400W 8" Slim Under-Seat Active Subwoofer, High-Level Inputs, Cast Aluminum Enclosure, for Car/Truck Audio Systems

**Brand:** rockville
**Price:** 2098 kr
**Availability:** ✅ In Stock

## Summary

> 🎶 Elevate your ride with bass that fits — feel the power without the bulk!

## Quick Answers

- **What is this?** SS8P 400W 8" Slim Under-Seat Active Subwoofer, High-Level Inputs, Cast Aluminum Enclosure, for Car/Truck Audio Systems by rockville
- **How much does it cost?** 2098 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/78487996-ss8p-400w-8-slim-under-seat-active-subwoofer-high-level)

## Best For

- rockville enthusiasts

## Why This Product

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

## Key Features

- • **Custom-Tailored Sound:** Adjust bass, phase, and gain to craft your perfect in-car audio vibe.
- • **Plug & Play Simplicity:** Built-in amplifier with high-level inputs and auto turn-on for hassle-free installation.
- • **Sleek Under-Seat Design:** Slim 2.8" profile fits discreetly under most vehicle seats, perfect for tight spaces.
- • **Durable Cast Aluminum Build:** Heat-dissipating enclosure ensures reliable, long-lasting performance on every drive.
- • **Powerful Bass, Minimal Footprint:** 400W peak power delivers deep, immersive lows without sacrificing cabin space.

## Overview

The Rockville SS8P is a compact yet powerful 8" active subwoofer delivering 400W peak power through a slim 2.8" under-seat design. Featuring a built-in amplifier with adjustable controls and a durable cast aluminum enclosure, it offers easy installation and rich, customizable bass for cars, trucks, and SUVs. Ideal for professionals seeking high-performance sound without compromising space.

## Description

The Rockville SS8P 400W 8" Slim Under-Seat Active Subwoofer adds deep, impactful bass to your car or truck audio system without taking up valuable space. With a compact 2.8" profile, it fits neatly under most vehicle seats, making it ideal for cars, trucks, and SUVs where space is limited.Powerful Audio: An 8" subwoofer delivers 400 watts of peak power and 100 watts RMS, producing rich low-end sound for a more dynamic listening experience.Compact Fit: Slim and sleek, it installs discreetly under your seat, leaving your trunk space free.Simple Setup: Features a built-in amplifier with high-level inputs, auto turn-on technology, and included mounting hardware for a clean, straightforward installation.Customizable Sound: Fine-tune your audio with adjustable bass boost, phase control, low pass filter, and input sensitivity.Reliable Build: The cast aluminum enclosure ensures efficient heat dissipation and durability, built to handle daily driving conditions.Whether you're upgrading a factory system or enhancing your commute, the Rockville SS8P offers big bass in a small footprint-ideal for music lovers who want high-performance sound in any vehicle.

Review: Great Sound! - Great sub! Easy install and the quality is there. The 10’ sub gives a great thump and fills the lower end nicely. It won’t rattle windows but the sound is clear and crisp. It does not sound distorted. The enclosure is compact, sturdy and fits under my seat. I will say that sitting in different areas of the car change the fullness of the sound. I have it under my driver seat and it sounds great but when I sit in the passenger rear seat, I don’t hear the bass as profound as I do when I’m sitting in the driver seat. Overall, I would highly recommend it. Especially for the price compared to some of the other products on here. I used a Boss 8gauge amp wire kit for my install and works perfect. Maybe a 4gauge would be preferred to prevent any overheating but an 8 is good enough. Oxygen Free cables would be the go to but I cheaped out. If you’re on the fence about it let me give you the nudge to get it! I think it’s great and worth the 100$ for an inclusive compact sub. DO IT!!!
Review: Good performance for the money - Put this in a 2025 jeep Wrangler to boost bass. Fits under the passenger seat. Wiring was easy and delivers clean deep bass for its size. Would buy again.

## Features

- DEEP BASS PERFORMANCE: Delivers 400W peak power with an 8" subwoofer for rich, immersive low frequencies in your car or truck audio system.
- SPACE-SAVING DESIGN: Slim 2.8" profile fits under most vehicle seats, maximizing space while providing powerful bass for small cars, trucks, or SUVs.
- BUILT-IN AMPLIFIER: Integrated amp simplifies setup, with high-level inputs and auto turn-on technology, plus adjustable controls for bass, phase, and gain.
- EASY INSTALLATION: Includes mounting hardware and remote bass knob for quick setup; compatible with factory or aftermarket audio systems.
- DURABLE CONSTRUCTION: Cast aluminum enclosure helps dissipate heat and keeps the subwoofer cool, ensuring long-lasting, reliable performance.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B079PRCP9W |
| Additional Features | Subwoofer, Waterproof, USB Charging, Built-in Microphone |
| Antenna Location | Car |
| Audio Driver Size | 8 Inches |
| Audio Driver Type | Dynamic Driver |
| Audio Output Mode | Stereo |
| Best Sellers Rank | #7,572 in Electronics ( See Top 100 in Electronics ) #25 in Car Component Subwoofers |
| Brand | Rockville |
| Built-In Media | Subwoofer |
| Color | black |
| Compatible Devices | Car, Truck |
| Compatible with Vehicle Type | Car, Truck |
| Connectivity Protocol | wired |
| Connectivity Technology | Bluetooth |
| Control Method | Remote |
| Controller Type | Remote Control |
| Customer Package Type | Standard Packaging |
| Customer Reviews | 4.4 out of 5 stars 3,522 Reviews |
| Enclosure Material | Aluminum |
| Frequency Response | 20 Hz |
| Global Trade Identification Number | 00819216020937 |
| Impedance | 4 Ohms |
| Input Voltage | 300 Millivolts |
| Is Waterproof | False |
| Item Dimensions D x W x H | 16"D x 12"W x 5"H |
| Item Type Name | Rockville SS8P 400w 8" Slim Under-Seat Active Powered Car/Truck Subwoofer Sub |
| MP3 player | No |
| Manufacturer | Rockville |
| Maximum Range | 10 Meters |
| Model Name | SS8P |
| Model Number | SS8P |
| Mounting Type | Under Seat Mount |
| Number of Audio Channels | 1.0 |
| Number of Items | 496 |
| Signal-to-Noise Ratio | 90 dB |
| Speaker Maximum Output Power | 400 Watts |
| Speaker Size | 8 Inches |
| Speaker Type | Subwoofer |
| Specific Uses For Product | Vehicle sound systems |
| Subwoofer Connectivity Technology | Wired |
| Subwoofer Diameter | 8 Inches |
| UPC | 819216020937 |
| Unit Count | 1.0 Count |
| Warranty Description | 1 YEAR |
| Warranty Type | Limited |
| Water Resistance Level | Not Water Resistant |
| Woofer Diameter | 8 Inches |

## Product Details

- **Audio Output Mode:** Stereo
- **Brand:** Rockville
- **Connectivity Technology:** Bluetooth
- **Frequency Response:** 20 Hz
- **Speaker Maximum Output Power:** 400 Watts

## Images

![SS8P 400W 8" Slim Under-Seat Active Subwoofer, High-Level Inputs, Cast Aluminum Enclosure, for Car/Truck Audio Systems - Image 1](https://m.media-amazon.com/images/I/710QlUy+RzL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great Sound!
*by L***O on September 11, 2025*

Great sub! Easy install and the quality is there. The 10’ sub gives a great thump and fills the lower end nicely. It won’t rattle windows but the sound is clear and crisp. It does not sound distorted. The enclosure is compact, sturdy and fits under my seat. I will say that sitting in different areas of the car change the fullness of the sound. I have it under my driver seat and it sounds great but when I sit in the passenger rear seat, I don’t hear the bass as profound as I do when I’m sitting in the driver seat. Overall, I would highly recommend it. Especially for the price compared to some of the other products on here. I used a Boss 8gauge amp wire kit for my install and works perfect. Maybe a 4gauge would be preferred to prevent any overheating but an 8 is good enough. Oxygen Free cables would be the go to but I cheaped out. If you’re on the fence about it let me give you the nudge to get it! I think it’s great and worth the 100$ for an inclusive compact sub. DO IT!!!

### ⭐⭐⭐⭐⭐ Good performance for the money
*by M***H on February 16, 2026*

Put this in a 2025 jeep Wrangler to boost bass. Fits under the passenger seat. Wiring was easy and delivers clean deep bass for its size. Would buy again.

### ⭐⭐⭐⭐ Temper your expectations
*by D***Y on August 24, 2025*

It's ok. I placed my powered sub in the back of my Prius, I can hear it but not anything crazy. Decent mids, probably like 80hz but definitely not getting anything 50hz or lower. Was hoping for something a bit louder and lower in the Hz range. Definitely nothing close to 800W, not even sure why the packaging uses that number. I even doubt the 200W RMS rating. Sounds like something closer to 100W. Pros: Small footprint, could fit under my seat Adds some mid bass Bass knob works and is pretty nice Value is pretty decent, especially compared to the price of other name brands You are not going to go deaf lol Cons: Not loud, it reaches its peak at about 50% of my volume, speakers overwhelm it and hard to hear when car is moving with wind noise. Nowhere close to sounding like 800W peak. If you are just looking for a bit of bass, this is not a bad starting point. If you are looking for deeper bass, definitely not for you. This will likely be enough for like 80% of the population.

## Frequently Bought Together

- Rockville SS8P 400w 8" Slim Under-Seat Active Powered Car/Truck Subwoofer Sub,Black
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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-03-10*