---
product_id: 300964983
title: "SS8P 400w 8\" Slim Under-Seat Active Powered Car/Truck Subwoofer Sub"
brand: "rockville"
price: "¥84967"
currency: JPY
in_stock: true
reviews_count: 7
category: "Rockville"
url: https://www.desertcart.jp/products/300964983-ss8p-400w-8-slim-under-seat-active-powered-car-truck
store_origin: JP
region: Japan
---

# 2.8" Slim Profile 400W Peak Power Cast Aluminum Enclosure SS8P 400w 8" Slim Under-Seat Active Powered Car/Truck Subwoofer Sub

**Brand:** rockville
**Price:** ¥84967
**Availability:** ✅ In Stock

## Summary

> 🎶 Feel the bass, not the bulk — upgrade your ride’s sound game!

## Quick Answers

- **What is this?** SS8P 400w 8" Slim Under-Seat Active Powered Car/Truck Subwoofer Sub by rockville
- **How much does it cost?** ¥84967 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/300964983-ss8p-400w-8-slim-under-seat-active-powered-car-truck)

## 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

- • **Smart Auto Turn-On:** High-level inputs with auto-sensing technology for effortless integration with factory or aftermarket systems.
- • **Powerful yet Compact:** 400W peak power delivers deep bass without sacrificing space under your seat.
- • **Sleek Under-Seat Design:** Only 2.8 inches thick for seamless installation in cars and trucks with limited space.
- • **Customizable Bass Control:** Adjustable input sensitivity, bass boost, phase switch, and remote bass knob for personalized sound.
- • **Durable Cooling Enclosure:** Cast aluminum housing keeps the subwoofer cool and reliable during long drives.

## Overview

The Rockville SS8P is a slim, 8-inch powered subwoofer designed to fit discreetly under your car or truck seat. With 400 watts peak power and a robust cast aluminum enclosure, it delivers rich, deep bass while staying cool and compact. Featuring smart auto turn-on technology and versatile input options, it integrates effortlessly with any vehicle audio system. Its adjustable controls and included remote bass knob let you tailor the sound to your exact preference, making it the ultimate all-in-one bass upgrade for space-conscious audiophiles.

## Description

The Ss8P Is An All In One Solution To Give You Great Sounding Bass In Your Vehicle Without Taking Up A Lot Of Space. This Sub Enclosure Is Only 2.8" Thick So That It Can Easily Fit Under Your Seat. The Amplifier Is Built In, So Installation And Wiring Is Clean And Simple. This Is A True All In One Subwoofer Solution With The Subwoofer Built Into The Enclosure Along With A Top Of The Line Amplifier Built In As Well. We Focused On Making Installation A Breeze So We Designed This Unit With You The Customer In Mind. We Added High Level Inputs So You Can Install This To An Aftermarket Or Factory System. The High Level Input Allows You To Install This Even If You Have No Preamp Outputs Available. The Smart Turn-On Circuit Will Sense That An Audio Signal Is Present And Turn On The Amplifier. When You Turn Off Your Music Signal The Amplifier Built Into This Subwoofer System Will Automatically Turn Itself Off. Something Else We Did To Make Installation Quick And Easy Is We Put All The Inputs And Outputs On One Side. This Makes Wiring Neater And Easier. Our Competitor'S Models Are More Challenging To Install. The Ss8P Has 400 Watts Of Peak Power And 100 Watts Rms. This Has Great Controls So You Can Adjust The Sound To Your Liking. It Has A Level Control For The Volume And Subsonic Filter To Filter Out The Really Low Frequencies Which The Human Ear Cannot Hear. This Also Has A Low Pass Crossover Filter, Phase Control, Input Sensitivity, And Bass Boost. Included Is A Remote Bass Knob, And Mounting Hardware But The Best Thing About Our Model Is The Sound. It Is Slim But It Sounds Like A Full Sized Subwoofer If You Are Not Happy With It We Will Offer You A 90-Day Money Back Guarantee. If You Don'T Like The Sound, We Will Send You A Pre-Paid Label And Refund You In Full!.

Review: Awesome!! - Sounds awesome in my transit van.
Review: Missing remote controller - The item came with damage box and with missing remote controller. The subwoofer had scratches as well. I have not tested the item yet if it is working

## Features

- Rockville SS8P 8" 400w Slim Under-Seat Active Powered Car/Truck Subwoofer Sub.
- Enclosure is made out of cast aluminum which stays cool at all times. Peak Power Handling: 400 Watts.
- RMS Power Handling: 100 Watts. Heavy Duty Mounting Feet. PWM MOSFET Power Supply. Low Level RCA Input. High Level Inputs with Auto Turn-On Technology. Adjustable Input Sensitivity. Soft Delayed Remote Turn-On. Thermal Protection Circuit, Short Protection Circuit. Overload Protection Circuit. Green Power/Red Protect LED. Phase Switch: 0° or 180°.
- Low Pass Filter: 50Hz - 150Hz. Bass Boost: 0 - 12dB @ 45Hz. Built in Subsonic Filter @ 20Hz. THD: < 0.4%. Subwoofer Level Remote Control. Fuse Rating: Single 15A.
- Specifications: Peak Power 400 Watts. RMS Power: 100 Watts. Impedance: 4 Ohm. Dimensions (L x W X H): 11.4" x 8.3" x 2.8" Inches. Frequency Response: 20Hz - 150Hz. Signal to Noise Ratio: >90dB. Sensitivity: 90dB @ 1w / 1m. Input sensitivity, Low level: 300mV. Input sensitivity, High level: 1.0V

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B079PRCP9W |
| Antenna Location | For cars or trucks |
| Audio Driver Size | 8 Inches |
| Audio Driver Type | Dynamic Driver |
| Audio Output Mode | Stereo |
| Audio output mode | Stereo |
| Best Sellers Rank | 154,811 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 101 in Car Enclosed Subwoofer Systems |
| Box Contents | Remote Bass Knob, Mounting Hardware |
| Brand | Rockville |
| Brand Name | Rockville |
| Colour | black |
| Compatible Devices | Smartphone, Tablet, MP3 player |
| Compatible with Vehicle Type | Car, Truck |
| Connectivity Protocol | RCA |
| Connectivity technology | RCA |
| Control Method | Remote |
| Controller Type | Remote Control |
| Customer Package Type | Standard Packaging |
| Customer Reviews | 4.4 out of 5 stars 2,705 Reviews |
| Enclosure Material | Metal, plastic |
| Frequency Response | 150 Hz |
| Frequency response | 150 Hz |
| Global Trade Identification Number | 00819216020937 |
| Impedance | 4 Ohms |
| Input Voltage | 300 Millivolts |
| Input voltage | 300 Millivolts |
| Is Waterproof | false |
| Item Dimensions D x W x H | 53.6D x 91W x 20.3H centimetres |
| Item Type Name | Rockville SS8P 400w 8" Slim Under-Seat Active Powered Car/Truck Subwoofer Sub |
| MP3 player | No |
| Manufacturer | Rockville |
| Maximum Range | 10 Metres |
| Maximum Speaker Output Power (in watts) | 400 Watts |
| Model Name | SS8P |
| Model Number | SS8P |
| Mounting Type | Under seat mounting |
| Network Connectivity Technology | RCA |
| Number of Audio Channels | 1.0 |
| Number of Items | 496 |
| Power Source | Corded Electric |
| Product Features | Bass Boost |
| Signal-to-Noise Ratio | 90 dB |
| Speaker Size | 8 Inches |
| Speaker Type | Subwoofer |
| Speaker maximum output power | 400 Watts |
| Specific Uses For Product | Vehicle sound systems |
| Subwoofer Connectivity Technology | Wired |
| Subwoofer Speaker Diameter | 8 Inches |
| Tweeter Diameter | 1 Inches |
| UPC | 819216020937 |
| Unit Count | 1.0 count |
| Warranty Type | Limited |
| Water Resistance Level | Not Water Resistant |
| Wireless Technology Type | No Wireless Communication Technology |
| Woofer Driver Diameter | 8 Inches |

## Product Details

- **Audio output mode:** Stereo
- **Brand:** Rockville
- **Connectivity technology:** RCA
- **Frequency response:** 150 Hz
- **Input voltage:** 300 Millivolts
- **Material:** Metal, plastic
- **Model name:** SS8P
- **Mounting type:** Under seat mounting
- **Speaker maximum output power:** 400 Watts
- **Speaker type:** Subwoofer

## Images

![SS8P 400w 8" Slim Under-Seat Active Powered Car/Truck Subwoofer Sub - Image 1](https://m.media-amazon.com/images/I/710QlUy+RzL.jpg)
![SS8P 400w 8" Slim Under-Seat Active Powered Car/Truck Subwoofer Sub - Image 2](https://m.media-amazon.com/images/I/716b5Ih1+yL.jpg)
![SS8P 400w 8" Slim Under-Seat Active Powered Car/Truck Subwoofer Sub - Image 3](https://m.media-amazon.com/images/I/71Hsz9TCJ9L.jpg)
![SS8P 400w 8" Slim Under-Seat Active Powered Car/Truck Subwoofer Sub - Image 4](https://m.media-amazon.com/images/I/71xEsF0rJEL.jpg)
![SS8P 400w 8" Slim Under-Seat Active Powered Car/Truck Subwoofer Sub - Image 5](https://m.media-amazon.com/images/I/71yJcQsSevL.jpg)

## Available Options

This product comes in different **Pattern, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Awesome!!
*by S***N on 22 March 2025*

Sounds awesome in my transit van.

### ⭐ Missing remote controller
*by W***Z on 6 February 2026*

The item came with damage box and with missing remote controller. The subwoofer had scratches as well. I have not tested the item yet if it is working

### ⭐⭐⭐⭐⭐ Me encantó
*by F***O on 27 October 2019*

Lo recomiendo ampliamente. Lo instale en mi Suzuki swift 2019 debido a que el audio deja mucho que desear a volúmenes altos. Mi intención era quitarle bajos a las bocinas incluidas en mi auto y complementar con este subwoofer para poder subir más el volumen total sin que distorsionara y funciono tal y como esperaba. Creo que este sistema está enfocado a reforzar los bajos de autos que tienen sonido de agencia, no para hacer vibrar las ventanas de los vecinos. Tamaño Me sorprendió lo compacto que es e incluso crei (por su tamaño) que no cumpliría con mis espectativas. Cabe debajo del asiento de mi auto y es casi imperceptible. Prácticamente no ocupa espacio y no estorba. Cabe recalcar que mi auto es muy pequeño y aún así pasa desapercibido. INSTALACIÓN La instalación será tan fácil como tu auto lo permita. En mi caso fue sencilla y no tengo experiencia en instalación aunque si tengo conocimientos de electrónica y herramientas. Solo necesitas conectar voltaje y fuente de audio, es todo. CALIDAD DE AUDIO Si tus espectativas son moderadas entonces tiene un buen sonido, es de cajón sellado por lo cual lo hace carecer de las frecuencias más bajas, pequeño precio a pagar por su tamaño tan compacto. Tienes que invertir un tiempo para ajustarlo a tus necesidades. CALIDAD La calidad de construcción es muy buena, es aluminio vaciado, lo cual le da mucho peso. El calor se dicipa en la carcasa. La parrilla que protege la bocina es de metal. EN RESUMEN Hasta el momento me siento satisfecho, hace lo que se supone y cumple con mis espectativas. No me gustó el led azul del potenciómetro, brilla demasiado, debieron utilizar un led rojo con menos brillo.

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-08-01*