---
product_id: 141374933
title: "Car Power Filter EMI Noise Ground Loop Isolator Suppressor for Auto Stereo Audio Radio Stereos Amplifier Amp Speaker Equalizer Subwoofer 12V"
brand: "ekylin"
price: "€ 30.20"
currency: EUR
in_stock: true
reviews_count: 13
category: "Ekylin"
url: https://www.desertcart.pt/products/141374933-car-power-filter-emi-noise-ground-loop-isolator-suppressor-auto
store_origin: PT
region: Portugal
---

# Compact 2.5x1.7 inch size Eliminates EMI & ground loop noise 12V max power filter Car Power Filter EMI Noise Ground Loop Isolator Suppressor for Auto Stereo Audio Radio Stereos Amplifier Amp Speaker Equalizer Subwoofer 12V

**Brand:** ekylin
**Price:** € 30.20
**Availability:** ✅ In Stock

## Summary

> 🔊 Silence the noise, amplify your vibe.

## Quick Answers

- **What is this?** Car Power Filter EMI Noise Ground Loop Isolator Suppressor for Auto Stereo Audio Radio Stereos Amplifier Amp Speaker Equalizer Subwoofer 12V by ekylin
- **How much does it cost?** € 30.20 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/141374933-car-power-filter-emi-noise-ground-loop-isolator-suppressor-auto)

## Best For

- ekylin enthusiasts

## Why This Product

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

## Key Features

- • **Compact & Discreet Design:** Small footprint fits easily in tight spaces without cluttering your dashboard or wiring.
- • **Pro-Grade Noise Isolation:** Professional-grade filtering ensures your sound system delivers pure, uninterrupted audio.
- • **Plug & Play Power Filtering:** Simple 3-wire connection designed for seamless integration with your car stereo system.
- • **Universal 12V Compatibility:** Engineered to work flawlessly with most DC 12V car audio devices including amps and subwoofers.
- • **Crystal-Clear Audio Every Drive:** Say goodbye to engine whine and static with advanced EMI noise suppression.

## Overview

The EKYLIN Car Power Filter FLT-318 is a compact, professional-grade EMI noise and ground loop isolator designed to eliminate electrical interference in 12V car audio systems. It reduces engine and electronic noise for crystal-clear sound across stereos, amplifiers, equalizers, and subwoofers, ensuring a premium listening experience with easy installation and universal compatibility.

## Description

Buy Car Power Filter EMI Noise Ground Loop Isolator Suppressor for Auto Stereo Audio Radio Stereos Amplifier Amp Speaker Equalizer Subwoofer 12V: Noise Filters - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Works as described - I don’t know how it works, but it does. I run a mini pre-amp thru my boat stereo to use with a CB style mic as an inexpensive PA system. (Guided sightseeing charter boat). New boat had a ton of line noise when the engine was running. So much, the PA was not usable. I ran the 12v supply for the stereo and pre-amp thru this isolator, and it greatly reduced the noise. There is still some noise, but it went from un-usable to useable. To be fair to the remaining line noise, I have to crank the radio volume to 33-35 so my guests can hear me. That’s pretty high, and I don’t fault this product for not removing 100% at the highest volume. Oh, like others have said, the wire insulation is ridiculously thick, but the wires are maybe 14 gauge, and appear tinned. The thick insulation only makes butt connectors really tight.
Review: Works Perfectly if Installed Correctly! - This absolutely works if installed correctly. Most of the Dual Electronics stereos have an alternator whine due to cheap or non-existent shielding within the radio itself. This is from my own personal experience with the brand. If your old car stereo did not have an alternator whine, and now it does, and you’re sure it the new stereo was installed correctly, it’s more than likely the build quality of the radio. To completely fix the whining noise, do the following: connect the Power Filter on the yellow, constant-hot (memory) wire between the vehicles harness and the car stereo. The “input” wire connects to the vehicle’s harness, the “output” wire connects to the stereo harness. Ground the black wire to a metal component attached to the vehicle’s frame. ZERO noise is now coming through my speakers when the truck is running. No noise on Bluetooth, AUX, radio, etc. Excellent product!

## Features

- 【Car power filter】It can eliminate the EMI/Ground Loop interference in the power source caused by the other car electronics or ignition. Especially good for car audio, sensitive electronic equipment, etc. Size: 2.5 x 1.7 x 0.1 inch. Wiring Length:7.5 inch.
- 【Reduce Audio Noises】 Filtering the power supply can reduce noise generated by the cigarette lighter or the other electronics. Get crystal clear sounds from the car speakers.
- 【How to connect】The red wire connects to the battery 12v+, the yellow wire connects to the power cable of the stereo where the electricity is going. The black wire connects to the vehicle’s metal frame or any available ground wire.
- 【Max Compatibility】Professional power filter designed for most DC 12V devices. Helps reduce ground loop interference and electrical noise commonly found in car audio systems. Compatible with car stereos, receivers, equalizers, amplifiers, and speakers. For best performance, ensure proper grounding and correct installation.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07S8VKG99 |
| Best Sellers Rank | #9 in Car Amplifier Noise Filters |
| Brand Name | EKYLIN |
| Customer Reviews | 3.9 out of 5 stars 654 Reviews |
| Item Dimensions | 2.52 x 1.69 x 0.98 inches |
| Item dimensions L x W x H | 2.52 x 1.69 x 0.98 inches |
| Manufacturer | EKYLIN |
| Material Type | Electronic-Grade Plastic |
| Maximum Supply Voltage | 12 Volts |
| Minimum Supply Voltage | 12 Volts (DC) |
| Model | FLT-318 |
| Mounting Type | Surface Mount |
| Number of Channels | 1 |
| Part Number | FLT-318 |
| Unit Count | 1.0 Count |
| Voltage | 12 Volts |

## Product Details

- **Item dimensions L x W x H:** 2.52 x 1.69 x 0.98 inches
- **Manufacturer:** EKYLIN
- **Maximum Supply Voltage:** 12 Volts
- **Minimum Supply Voltage:** 12 Volts (DC)
- **Voltage:** 12 Volts

## Images

![Car Power Filter EMI Noise Ground Loop Isolator Suppressor for Auto Stereo Audio Radio Stereos Amplifier Amp Speaker Equalizer Subwoofer 12V - Image 1](https://m.media-amazon.com/images/I/519-4n1hsCL.jpg)
![Car Power Filter EMI Noise Ground Loop Isolator Suppressor for Auto Stereo Audio Radio Stereos Amplifier Amp Speaker Equalizer Subwoofer 12V - Image 2](https://m.media-amazon.com/images/I/51M17BoiW7L.jpg)
![Car Power Filter EMI Noise Ground Loop Isolator Suppressor for Auto Stereo Audio Radio Stereos Amplifier Amp Speaker Equalizer Subwoofer 12V - Image 3](https://m.media-amazon.com/images/I/51E3lirPAkL.jpg)
![Car Power Filter EMI Noise Ground Loop Isolator Suppressor for Auto Stereo Audio Radio Stereos Amplifier Amp Speaker Equalizer Subwoofer 12V - Image 4](https://m.media-amazon.com/images/I/51MJWO2ruxL.jpg)
![Car Power Filter EMI Noise Ground Loop Isolator Suppressor for Auto Stereo Audio Radio Stereos Amplifier Amp Speaker Equalizer Subwoofer 12V - Image 5](https://m.media-amazon.com/images/I/61UAT32K3TL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works as described
*by C***N on September 18, 2024*

I don’t know how it works, but it does. I run a mini pre-amp thru my boat stereo to use with a CB style mic as an inexpensive PA system. (Guided sightseeing charter boat). New boat had a ton of line noise when the engine was running. So much, the PA was not usable. I ran the 12v supply for the stereo and pre-amp thru this isolator, and it greatly reduced the noise. There is still some noise, but it went from un-usable to useable. To be fair to the remaining line noise, I have to crank the radio volume to 33-35 so my guests can hear me. That’s pretty high, and I don’t fault this product for not removing 100% at the highest volume. Oh, like others have said, the wire insulation is ridiculously thick, but the wires are maybe 14 gauge, and appear tinned. The thick insulation only makes butt connectors really tight.

### ⭐⭐⭐⭐⭐ Works Perfectly if Installed Correctly!
*by M***W on January 27, 2025*

This absolutely works if installed correctly. Most of the Dual Electronics stereos have an alternator whine due to cheap or non-existent shielding within the radio itself. This is from my own personal experience with the brand. If your old car stereo did not have an alternator whine, and now it does, and you’re sure it the new stereo was installed correctly, it’s more than likely the build quality of the radio. To completely fix the whining noise, do the following: connect the Power Filter on the yellow, constant-hot (memory) wire between the vehicles harness and the car stereo. The “input” wire connects to the vehicle’s harness, the “output” wire connects to the stereo harness. Ground the black wire to a metal component attached to the vehicle’s frame. ZERO noise is now coming through my speakers when the truck is running. No noise on Bluetooth, AUX, radio, etc. Excellent product!

### ⭐ Eliminated alternator whine 100%
*by B***. on August 14, 2025*

Updated Review 08/27/25: After it was installed in the car two to three weeks, it failed and would blow the car radio fuse instantly. I checked all wiring connections to make sure nothing had come loose. Once I removed this device, the fuse stopped blowing. I recommend not purchasing this item. My original update is below. I installed this in my 1999 Plymouth Prowler after replacing the factory radio with an aftermarket unit. Immediately after the radio swap, I noticed a distinct buzzing sound from the speakers that varied with the engine's RPMs, a classic sign of alternator whine. I was frustrated and worried I'd have to live with the noise, but then I installed this product. The difference was night and day. The alternator buzz completely vanished, leaving me with clear, clean audio. This device was easy to install and it completely solved my problem. Highly recommend it to anyone dealing with similar audio issues after a stereo upgrade."

## Frequently Bought Together

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-07-03*