---
product_id: 128862288
title: "W65K9D4 6.5\" 1000W Peak / 250W RMS Dual 4-Ohm Car Audio Subwoofer, CEA-Rated, OFC 2\" Voice Coils, Double 66oz Magnet, Cast Aluminum Basket, for Car Audio Systems & Custom Installs"
brand: "rockville"
price: "798 Lei"
currency: RON
in_stock: true
reviews_count: 13
category: "Rockville"
url: https://www.desertcart.ro/products/128862288-w65k9d4-6-5-1000w-peak-250w-rms-dual-4-ohm
store_origin: RO
region: Romania
---

# 1000W Peak Power Double 66oz Magnet 2" OFC Voice Coils W65K9D4 6.5" 1000W Peak / 250W RMS Dual 4-Ohm Car Audio Subwoofer, CEA-Rated, OFC 2" Voice Coils, Double 66oz Magnet, Cast Aluminum Basket, for Car Audio Systems & Custom Installs

**Brand:** rockville
**Price:** 798 Lei
**Availability:** ✅ In Stock

## Summary

> 🎵 Small Size, Massive Bass — Own the Road’s Soundtrack!

## Quick Answers

- **What is this?** W65K9D4 6.5" 1000W Peak / 250W RMS Dual 4-Ohm Car Audio Subwoofer, CEA-Rated, OFC 2" Voice Coils, Double 66oz Magnet, Cast Aluminum Basket, for Car Audio Systems & Custom Installs by rockville
- **How much does it cost?** 798 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/128862288-w65k9d4-6-5-1000w-peak-250w-rms-dual-4-ohm)

## 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

- • **Magnet Muscle:** Double-stacked 66oz magnet with high BL motor gap ensures tight, punchy bass that outperforms bigger subs.
- • **Unmatched Bass Power:** 1000W peak and 250W RMS deliver deep, distortion-free lows that command attention on every drive.
- • **Compact Fit, Big Impact:** 6.5" size with 4.17" mounting depth fits custom installs without sacrificing power or presence.
- • **Durable Precision Design:** Cast aluminum basket and reinforced cone with thick foam surround guarantee longevity and sonic clarity.
- • **Heat-Resistant Voice Coils:** 2" 4-layer ASV coils with USA-made OFC wire withstand up to 180°C for rock-solid reliability.

## Overview

The Rockville W65K9D4 is a compact 6.5" dual 4-ohm car subwoofer engineered for powerful, distortion-free bass with a peak output of 1000W and RMS of 250W. Featuring heat-resistant 2" OFC voice coils, a heavy double 66oz magnet, and a durable cast aluminum basket, it delivers tight, impactful low frequencies ideal for custom car audio setups. Its compact design fits easily into sealed or ported enclosures, making it the perfect upgrade for audiophiles craving premium bass performance in a sleek package.

## Description

The Rockville W65K9D4 6.5" Dual 4-Ohm Car Audio Subwoofer combines compact size with powerful performance. Delivering 1000 watts peak, 500 watts program, and 250 watts RMS (CEA-rated), it produces deep, distortion-free bass that enhances any music style. Built with 2" 4-layer ASV voice coils wound with USA-made OFC wire, this sub is thermally stable up to 180 degree C for consistent performance. A double-stacked 66 oz magnet with a high BL motor gap provides strong bass output, while the black non-pressed paper cone, thick foam surround, and black stitching ensure durability and clarity. The cast aluminum basket with black sanded finish keeps weight low and efficiency high, while the vented T-yoke improves heat dissipation during extended use. With 82.1dB sensitivity, a frequency response of 52Hz-800Hz, and a 4.17" mounting depth, this subwoofer fits easily into sealed or ported enclosures. The polypropylene dustcap, poly cotton spider, and chrome-plated terminals add reliability and style. Designed for car audio enthusiasts, the W65K9D4 is perfect for those seeking powerful bass in a compact 6.5" format.

Review: Extreme sound - Good quality for a low price
Review: Cool - This is a bad lil dude. I have it reversed in a ported 1cu box and it’s way louder than you would expect. Sounds like a decent 10” sub. I would recommend running it a 4ohms tho because it doesn’t take much at all to make it tap at 1ohm. (By itself.) probably gonna buy one more

## Features

- POWERFUL BASS OUTPUT: 1000W peak, 500W program, and 250W RMS (CEA-rated) deliver deep, distortion-free low frequencies for impactful car audio.
- PREMIUM VOICE COILS: 2" 4-layer ASV coils wound with OFC wire (USA-made) handle high heat up to 180 degree C for stable, reliable performance.
- HEAVY-DUTY MAGNET: Double-stacked 66 oz magnet with high BL motor gap ensures strong output and tight bass response.
- DURABLE DESIGN: Black non-pressed paper cone with black stitching, thick foam surround, and polypropylene dustcap for strength and accuracy.
- ENGINEERED FOR PERFORMANCE: Cast aluminum basket with vented T-yoke for heat dissipation, 82.1dB sensitivity, 52Hz-800Hz frequency response, and 4.17" mounting depth.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07S62X9PM |
| Audio Driver Size | 6.5 Inches |
| Audio Driver Type | Dynamic Driver |
| Best Sellers Rank | #44,342 in Electronics ( See Top 100 in Electronics ) #106 in Car Component Subwoofers |
| Color | Black |
| Compatible Devices | MP3 Player, Smartphone, Tablet |
| Control Method | Voice |
| Customer Package Type | Standard Packaging |
| Customer Reviews | 4.5 4.5 out of 5 stars (306) |
| Date First Available | May 23, 2019 |
| Global Trade Identification Number | 00819216023204 |
| Impedance | 4 Ohms |
| Included Components | Car Audio Subwoofer |
| Is Waterproof | FALSE |
| Item Weight | 12 pounds |
| Item model number | W65K9D4 |
| Manufacturer | Rockville |
| Material | Aluminum, Paper, Polypropylene |
| Maximum Range | 10 Meters |
| Model Name | W65K9D4 |
| Mounting Type | Car Mount |
| Number of Items | 1 |
| Power Source | Corded Electric |
| Product Dimensions | 9.84"D x 84"W x 9.65"H |
| Recommended Uses For Product | car |
| Set Name | Single |
| Shape | rectangular prism |
| Speaker Size | 6.5 Inches |
| Speaker Type | Subwoofer |
| Specific Uses For Product | Car Audio |
| Style | 6.5” K9 Series 4 Ohm |
| Subwoofer Connectivity Technology | Wired |
| Subwoofer Diameter | 6.5 Inches |
| Surround Sound Channel Configuration | 2.1 |
| UPC | 819216023204 |
| Unit Count | 1.0 Count |
| Warranty Type | Limited |
| Wireless Communication Technology | No Wireless Communication Technology |
| Woofer Diameter | 6.5 Inches |

## Product Details

- **Audio Output Mode:** Surround
- **Brand:** Rockville
- **Connectivity Technology:** wired
- **Frequency Response:** 800 Hz
- **Speaker Maximum Output Power:** 1000 Watts

## Images

![W65K9D4 6.5" 1000W Peak / 250W RMS Dual 4-Ohm Car Audio Subwoofer, CEA-Rated, OFC 2" Voice Coils, Double 66oz Magnet, Cast Aluminum Basket, for Car Audio Systems & Custom Installs - Image 1](https://m.media-amazon.com/images/I/71KFij1e8nL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Extreme sound
*by R***S on January 5, 2026*

Good quality for a low price

### ⭐⭐⭐⭐⭐ Cool
*by B***H on May 16, 2025*

This is a bad lil dude. I have it reversed in a ported 1cu box and it’s way louder than you would expect. Sounds like a decent 10” sub. I would recommend running it a 4ohms tho because it doesn’t take much at all to make it tap at 1ohm. (By itself.) probably gonna buy one more

### ⭐⭐⭐⭐⭐ So far impressed with the sub, project not as easy as hoped, not the woofer's fault though
*by J***N on January 28, 2026*

So far I'm definitely impressed. It can be very difficult to locate a drop-in replacement driver for a specialty enclosure, especially when the OM is no longer in business. I have a sweet little Pinnacle SubCompact6 mini-sub that I have enjoyed in office and bedroom systems over the years, but the voice coil developed distortion. Searched the web options for a true 6.5" subwoofer and found this Rockville. Measurements were close, but obviously so are tolerances in a 7" cube with lots of amp hardware installed (200W with physically separate transformer mounted on the bottom of the box). That transformer was the rub, literally. Even with the magnet boot removed from the Rockville, had to use thick high density gasketing tape to space the transformer plate out about 1/8" from the bottom of the box to get the clearance needed for the magnet. Got it all buttoned up though, still have a tiny air leak as the Rockville rubber gasket on the mounting flange is a bit too stiff to really compress into an airtight seal, will take it apart again and probably replace the Rockville rubber gasket with foam gasketing tape. It could also be one of the original screw holes as I needed to drill new ones for the Rockville hole pattern. Of course, none of this reflects on the woofer or Rockville whatsoever, nobody told me it would drop in. The selling point was that the measurements were awfully close, but I also needed 4ohm and this is available in either dual 2ohm or dual 4ohm, so I chose the dual 2ohm and wired in series to get a 4ohm nominal impedance. Also, Rockville lists the sealed enclosure volume as low as 0.14 cubic feet, and my enclosure is roughly 0.19. I know the specs show it doesn't play much below 50Hz, but I'm listening to music with bass notes in the 35Hz range and it is handling them pretty darned well for a 6.5" driver. Have to call the project a success, need to figure out a grill of some kind because the factory original was way too shallow. Sound is more important than cosmetics of course, and it's probably going back under the desk where it was before anyway. Would recommend, and would purchase again for a similar install.

## Frequently Bought Together

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-02-12*