---
product_id: 206873560
title: "4D Furnishers Single Passive to Active Home Theater SubWoofer Amplifier | 300 Watts RMS | HSWA-300 (Update 20.06.2024)"
brand: "4d furnishers"
price: "$163.26"
currency: USD
in_stock: false
reviews_count: 8
url: https://www.desertcart.us/products/206873560-4d-furnishers-single-passive-to-active-home-theater-subwoofer-amplifier
store_origin: US
region: United States of America
---

# MOSFET with copper transformer 300W RMS power output 10Hz-150Hz frequency range 4D Furnishers Single Passive to Active Home Theater SubWoofer Amplifier | 300 Watts RMS | HSWA-300 (Update 20.06.2024)

**Brand:** 4d furnishers
**Price:** $163.26
**Availability:** ❌ Out of Stock

## Summary

> 🎵 Elevate your bass game with pure power and precision!

## Quick Answers

- **What is this?** 4D Furnishers Single Passive to Active Home Theater SubWoofer Amplifier | 300 Watts RMS | HSWA-300 (Update 20.06.2024) by 4d furnishers
- **How much does it cost?** $163.26 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/206873560-4d-furnishers-single-passive-to-active-home-theater-subwoofer-amplifier)

## Best For

- 4d furnishers enthusiasts

## Why This Product

- Trusted 4d furnishers brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact & User-Friendly:** Sleek 10x10x4 inch design with easy RCA connectivity and speaker protection features—perfect for modern, clutter-free entertainment spaces.
- • **Durable & Reliable Build:** Heavy-duty copper transformer and upgraded heat sink provide stable performance and long-lasting durability for your home audio setup.
- • **Powerful 300W RMS Output:** Drive subwoofers up to 12 inches with a robust 300 Watts RMS, delivering deep, authoritative bass that commands attention.
- • **Pure Class AB Sound Clarity:** Experience rich, distortion-free bass with a classic Class AB amplifier design that outperforms typical Class D amps.
- • **Precision Low-Pass Filtering:** Inbuilt low-pass filter cuts treble and vocals, ensuring your subwoofer focuses solely on the deep bass frequencies.

## Overview

The 4D Furnishers HSWA-300 is a wired mono subwoofer amplifier designed for 10-12 inch single coil subwoofers, delivering 300 Watts RMS power with a frequency response of 10Hz to 150Hz. Featuring a pure Class AB design, MOSFET circuitry with a copper transformer, and an inbuilt low-pass filter, it ensures clean, powerful bass output. Its compact size, durable build with upgraded heat sink, and user-friendly RCA connectivity make it an excellent choice for audiophiles seeking reliable, high-quality subwoofer amplification at an affordable price.

## Description

The product comes in a very proper packaging. This product will be an excellent pick for you.

Review: Pure Class AB - This is a pure Class AB amplifier, and that itself is refreshing in today’s market dominated by Class D designs. It features a genuine, separate low-pass filter, which can be bypassed if needed, effectively allowing the unit to be used as a monoblock amplifier—a thoughtful and practical design choice. At this price point, a toroidal transformer is understandably not feasible. However, the use of a traditional EI transformer is still a better and more reliable choice compared to many Class D amplifiers that rely on external SMPS units, most of which are China-made and often cost significantly more. From a durability and serviceability perspective, this is a sensible engineering decision. In a market like India, where price sensitivity is a major factor, designing and delivering a well-built Class AB amplifier at this cost is quite remarkable. Overall, this amplifier offers excellent value for money, solid performance, and honest engineering without unnecessary gimmicks. Highly recommended for those who appreciate sound quality, simplicity, and reliability over marketing hype, and at a cost which can be affordable by average people like me. ई pure Class AB amplifier हवे, आज के Class D से भरे बाजार में एकदम fresh feel देवे वाला। इसमें असली अलग Low-Pass Filter बा, जवन bypass करके इसे monoblock amp भी बना सकतानी—बिलकुल practical design। एह दाम में toroidal transformer ना मिल पाना समझ में आवे ला, लेकिन EI transformer Class D + बाहरी SMPS (जो ज़्यादातर China से आवे ला) से कहीं ज़्यादा भरोसेमंद बा। भारत में जहाँ दाम बहुत matter करेला, ओह हिसाब से इतना बढ़िया Class AB amp इस कीमत पर मिलना बड़ी बात बा। Sound बढ़िया, बनावट मजबूत—पूरा पैसा वसूल। Sound quality पसंद करे वाला आम आदमी खातिर पूरी तरह recommend।
Review: This amp is great! - Update: The seller (Mr Ketan) was very helpful and kept his promise of repairing the amp under warranty. I had to only pay for the courier service which came to Rs 600. This amp is great and is better than class D amps like the Fosi Audio TP-02 (which I also own). Going from that Fosi to this, did feel like a step up. Will update this review by year end and hope it will work fine for long. For now, back to 5 stars! (previous was 3). Thanks Mr Ketan for the support. I received this item at the start of November and was amazed by the quality of bass it put out. I converted my active Edifier T5 (which had conked off) to passive after Mr Ketan put that idea in my head on call. He was very polite and helpful. This thing made the T5 sound so much better. The bass was clear and hit with authority like the inbuilt T5 amp couldn't dream of doing. I even ordered his 12 inch sub to replace the T5 and the combination with this was fantastic. Mr Ketan wanted me to write a review but I got busy in December and then somehow put it as a to do thing later. Then I decided to wait after some months of use to give my review. Unfortunately this amp on its own, went up in smoke. While playing, I heard a bit of a 'thud' sound and then saw smoke coming out of the vents. It was toast. Wanted to give it 5 stars but this happened. I'm now using a spare fosi amp to power the woofer, which does the job well enough but it isn't as clean as this was. Not sure if it is worth attempting a repair, with courier costs to send it to Delhi and no guarantee if this can be repaired and sent back (whether the total cost of repair and courier services will be reasonable or almost like buying new).

## Features

- Support for single subwoofer rated upto 300-400 Watts RMS, single coil subwoofers, Woofer Size: 10-12 inches, Frequency Response: 10Hz to 150Hz
- Impedance: 4-8 Ohms, 300 Watts RMS (peak power), 200 Watts RMS (Nominal Power), Dimensions - WxDxH = 10x10x4 Inches.
- Inputs: 1xRCA. Line out through RCA to connect with other audio devices like any other amplifiers.
- MOSFET based with pure copper transformer for improved sound quality and power handling. Please keep the amplifier switched off while connecting speaker wires to prevent damage.
- Inbuilt lowpass filter to cut off treble and vocals from subwoofer. Direct mode to use as power amplifer. Bigger heat sink(updaed) and soft start module with speaker protection added. Heavy duty power cord with 3 pin plug to avoid unwanted unplugging. Compact Size (Updated) Note: COD orders may get cancelled

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07N93HCXV |
| Age Range Description | Adult |
| Antenna Location | For Surround Sound Systems |
| Audio Driver Size | 12 Inches |
| Audio Driver Type | Dynamic Driver |
| Audio Output Mode | Mono |
| Best Sellers Rank | #294,011 in Electronics ( See Top 100 in Electronics ) #495 in Hi-Fi Amplifiers |
| Box Contents | 1 Amplifier |
| Brand | 4D Furnishers |
| Brand Name | 4D Furnishers |
| Colour | Black |
| Compatible Devices | Audio Video Receivers or Stereo Amplifiers |
| Connectivity Protocol | RCA |
| Connectivity Technology | RCA |
| Control Method | Touch |
| Controller Type | Button |
| Customer Package Type | Carton and Customized foam |
| Customer Reviews | 4.2 out of 5 stars 140 Reviews |
| Enclosure Material | Metal |
| Frequency Response | 10 Hz |
| Impedance Unit of Measure | 4 Ohms |
| Is Waterproof | no |
| Item Dimensions D x W x H | 25D x 25W x 10H Centimeters |
| Item Type Name | Amplifier |
| Item Weight Unit of Measure | 5 Kilograms |
| Manufacturer | 4D Furnishers, 4D Furnishers Pvt. Ltd. : 4dfurnishers@gmal.com |
| Manufacturer Contact Information | 4D Furnishers Pvt. Ltd. : 4dfurnishers@gmal.com |
| Model Name | HSWA-300 |
| Model Number | HSWA-300 |
| Mounting Type | Tabletop Mount |
| Network Connectivity Technology | RCA |
| Number of Audio Channels | 1.0 |
| Number of Items | 1 |
| Packer Contact Information | 4D Furnishers Pvt. Ltd. : 4dfurnishers@gmal.com |
| Power Source | Corded Electric |
| Product Features | Subwoofer |
| Speaker Maximum Output Power | 220 Watts |
| Speaker Size | 12 Inches |
| Speaker Type | Subwoofer |
| Specific Uses For Product | Home Entertainment |
| Subwoofer Speaker Diameter Unit of Measure | 15 Inches |
| Tweeter Driver Diameter | 4 Inches |
| Unit Count | 1.00 Piece |
| Warranty Description | 1 year warranty against manufacturing defects. Both side shipping costs to be paid by customer. Or we can send parts that may be defective free of charge (Shipping to be paid by customer) and customer can get the product repaired locally. |
| Warranty Type | Manufacturer |
| Water Resistance Level | Not Water Resistant |
| Wireless Technology Type | Bluetooth |
| Woofer Driver Diameter | 12 Inches |

## Product Details

- **Brand:** 4D Furnishers
- **Speaker Maximum Output Power:** 220 Watts
- **Frequency Response:** 10 Hz
- **Connectivity Technology:** RCA
- **Audio Output Mode:** Mono

## Images

![4D Furnishers Single Passive to Active Home Theater SubWoofer Amplifier | 300 Watts RMS | HSWA-300 (Update 20.06.2024) - Image 1](https://m.media-amazon.com/images/I/61DqhcnLg9L.jpg)
![4D Furnishers Single Passive to Active Home Theater SubWoofer Amplifier | 300 Watts RMS | HSWA-300 (Update 20.06.2024) - Image 2](https://m.media-amazon.com/images/I/51jMNv28kdL.jpg)
![4D Furnishers Single Passive to Active Home Theater SubWoofer Amplifier | 300 Watts RMS | HSWA-300 (Update 20.06.2024) - Image 3](https://m.media-amazon.com/images/I/61O94Z5v6eL.jpg)
![4D Furnishers Single Passive to Active Home Theater SubWoofer Amplifier | 300 Watts RMS | HSWA-300 (Update 20.06.2024) - Image 4](https://m.media-amazon.com/images/I/61jlKvEtuRL.jpg)
![4D Furnishers Single Passive to Active Home Theater SubWoofer Amplifier | 300 Watts RMS | HSWA-300 (Update 20.06.2024) - Image 5](https://m.media-amazon.com/images/I/61K2Ng2MLbL.jpg)

## Questions & Answers

**Q: Is this 1 chenal 300 watt & 2 chenal 300 watt... Write...?**
A: 1 channel 300 watt RMS MAX

**Q: Can I use this 4d furnishers 155 magnet 400rms 12 inch subwoofer**
A: Yes you can use

**Q: Can I use 400rms rebel subwoofer**
A: Yes

**Q: Can i use pioneer 1300w 30cm car subwoofer?**
A: Yes

## Customer Reviews

### ⭐⭐⭐⭐⭐ Pure Class AB
*by C***S on 25 January 2026*

This is a pure Class AB amplifier, and that itself is refreshing in today’s market dominated by Class D designs. It features a genuine, separate low-pass filter, which can be bypassed if needed, effectively allowing the unit to be used as a monoblock amplifier—a thoughtful and practical design choice. At this price point, a toroidal transformer is understandably not feasible. However, the use of a traditional EI transformer is still a better and more reliable choice compared to many Class D amplifiers that rely on external SMPS units, most of which are China-made and often cost significantly more. From a durability and serviceability perspective, this is a sensible engineering decision. In a market like India, where price sensitivity is a major factor, designing and delivering a well-built Class AB amplifier at this cost is quite remarkable. Overall, this amplifier offers excellent value for money, solid performance, and honest engineering without unnecessary gimmicks. Highly recommended for those who appreciate sound quality, simplicity, and reliability over marketing hype, and at a cost which can be affordable by average people like me. ई pure Class AB amplifier हवे, आज के Class D से भरे बाजार में एकदम fresh feel देवे वाला। इसमें असली अलग Low-Pass Filter बा, जवन bypass करके इसे monoblock amp भी बना सकतानी—बिलकुल practical design। एह दाम में toroidal transformer ना मिल पाना समझ में आवे ला, लेकिन EI transformer Class D + बाहरी SMPS (जो ज़्यादातर China से आवे ला) से कहीं ज़्यादा भरोसेमंद बा। भारत में जहाँ दाम बहुत matter करेला, ओह हिसाब से इतना बढ़िया Class AB amp इस कीमत पर मिलना बड़ी बात बा। Sound बढ़िया, बनावट मजबूत—पूरा पैसा वसूल। Sound quality पसंद करे वाला आम आदमी खातिर पूरी तरह recommend।

### ⭐⭐⭐⭐⭐ This amp is great!
*by R***S on 13 March 2025*

Update: The seller (Mr Ketan) was very helpful and kept his promise of repairing the amp under warranty. I had to only pay for the courier service which came to Rs 600. This amp is great and is better than class D amps like the Fosi Audio TP-02 (which I also own). Going from that Fosi to this, did feel like a step up. Will update this review by year end and hope it will work fine for long. For now, back to 5 stars! (previous was 3). Thanks Mr Ketan for the support. I received this item at the start of November and was amazed by the quality of bass it put out. I converted my active Edifier T5 (which had conked off) to passive after Mr Ketan put that idea in my head on call. He was very polite and helpful. This thing made the T5 sound so much better. The bass was clear and hit with authority like the inbuilt T5 amp couldn't dream of doing. I even ordered his 12 inch sub to replace the T5 and the combination with this was fantastic. Mr Ketan wanted me to write a review but I got busy in December and then somehow put it as a to do thing later. Then I decided to wait after some months of use to give my review. Unfortunately this amp on its own, went up in smoke. While playing, I heard a bit of a 'thud' sound and then saw smoke coming out of the vents. It was toast. Wanted to give it 5 stars but this happened. I'm now using a spare fosi amp to power the woofer, which does the job well enough but it isn't as clean as this was. Not sure if it is worth attempting a repair, with courier costs to send it to Delhi and no guarantee if this can be repaired and sent back (whether the total cost of repair and courier services will be reasonable or almost like buying new).

### ⭐⭐⭐⭐ Better than active subwoofers
*by A***H on 27 January 2021*

Its giving good bass as compared to the back panel of active subwoofers. So active subwoofers are no longer worth it.

## Frequently Bought Together

- 4D Furnishers HSWA-300 300 Watts RMS Wired Single SubWoofer Amplifier Black Color for Subwoofers Upto 12 inches (Update 20.06.2024)
- SP Electron (Pack of 10) 2 Pins Square Spring Clip Speaker Terminal Block Audio Amplifier PCB Mount Jointing Clamp Connector
- 4D Furnishers 2.1/5.1 Hybrid Amplifier for 5.1 Home Theater Speakers and Subwoofer All Together 600 Watts VD99-2.1 (Updated 26.06.2024)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-05-16*