Garage
Shop

See all parts that fit your 1997 318i

Boss B25N

2-Channel Ground Loop Isolator Filter

Boss
Shop all Boss
highlight-star-icon

• 2-Channel Ground Loop Isolator Filter
• Blocks Ground Loops Within An Audio System
• Connection Type: RCA
• Reduces Background Noise Without Impairing Sound Quality

Learn more about the b25n

We apologize

This item has been discontinued


Loading...
UTE-73BT main

Alpine UTE-73BT

Single DIN Digital Media Receiver with Bluetooth

44
-16.69%

$149.95

List price $180.00

Limited time!
46CSC54 main

Kicker CSC5 (46CSC54)

450W Peak (150W RMS) 5.25” CS Series 2 Way Coaxial 4-ohm Speakers

5
-33.36%

$79.96

List price $119.99

Stage3 427F main

JBL Stage3 427F (STAGE3427FAM)

300W Peak (60W RMS) 4" Stage3 Series 2-Way Coaxial 3-ohm Car Speakers

3
-22.23%

$69.95

List price $89.95

Description


Boss brand icon

Authorized dealer

Product Features:

  • 2-Channel Ground Loop Isolator Filter
  • Blocks ground loops within an audio system
  • Reduces background noise without impairing sound quality
  • Connection Type: RCA
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Loading...
CV15BT main

Cerwin-Vega CV15BT

Single Din Digital Media Receiver with Bluetooth

3
UTE-73BT main

Alpine UTE-73BT

Single DIN Digital Media Receiver with Bluetooth

44
-16.69%

$149.95

List price $180.00

Club 522F main

JBL Club 522F (SPKCB522FAM)

270W Peak (90W RMS) 5.25" Club Series 2 Way Coaxial 3-ohm Speakers

-42.29%

$74.99

List price $129.95

Reference 5030cx main

Infinity Reference 5030cx (REF5030CX)

390W Peak (130W RMS) 5.25" Reference Series 2-Way 3-ohm Component Speaker System

2
-60.01%

$99.95

List price $249.95

Limited time!
XAV-AX8500 main

Sony XAV-AX8500

10.1" Single DIN Floating Touchscreen Digital Multimedia Receiver with Bluetooth, Wireless Apple CarPlay, and Wired Android Auto (SiriusXM Ready)

2
-20.20%

$798.00

List price $999.99

Kenwood eXcelon KMM-X705

Single DIN Digital Media Receiver with Bluetooth, Built-in Alexa (Sirius XM Ready)

6
-20.40%

$199.00

List price $250.00

KDC-X305 main

Kenwood eXcelon KDC-X305

Single DIN CD Receiver with Bluetooth and Built-in Alexa (Sirius XM Ready)

23
-17.08%

$199.00

List price $240.00

DEH-S7200BHS main

Pioneer DEH-S7200BHS

Single DIN CD Receiver with Bluetooth, HD Radio and SiriusXM Ready

2
-10.72%

$249.99

List price $280.00

TS-A1081F main

Pioneer TS-A1081F

460W Peak (100W RMS) 4” A Series 2-way 4-ohm Coaxial Car Speakers

3
-18.18%

$90.00

List price $110.00

MVH-S322BT main

Pioneer MVH-S322BT

Single DIN Digital Media Receiver with Bluetooth and Amazon Alexa

7
-13.34%

$129.99

List price $150.00


Best selling similar products

SNI-1 small

PAC SNI-1

• RCA Noise Filter
• Close to perfect response of +/- .03 dB from 20 Hz - 20kHz
• Eliminates ground loop noise
• Reduces most noise

(37)

$11.99

List price $19.00

SNI-1/3.5 small

PAC SNI-1/3.5

• Ground Loop Isolator
• Close to Perfect Response of +/- 0.03 dB From 2-20,000 Hz
• Utilizes Proprietary Audio Transformers for a 1.3 dB Gain
• Female 3.5mm Input
• Male 3.5mm Output

(85)

$15.99

List price $19.00

SSGLI small

Stinger SSGLI

• 2-Channel Ground Loop Isolator
• Eliminates Noise and Static

(1)

$11.99

List price $29.00

AXFD-5V small

Axxess AXFD-5V

• 12-volt to 5-volt Step-Down Interface
• Fixes audible 'pop' when aftermarket stereo turns on factory amplifier
• Designed for use in Ford, Lincoln, and Mercury vehicles

$27.99

List price $31.99

AXGLI-R small

Axxess AXGLI-R

• 2-channel RCA ground loop isolator
• Easily eliminates unwanted ground loop noise
• No need for additional adapters
• Universal vehicle application

$20.99

List price $23.99

NF1 small

DS18 NF1

• 1-Channel RCA Compact Noise Filter
• Number of channels: 1-Mono
• Input type: Female RCA
• Output type: Male RCA

$22.95

List price $22.95

AXCSD-6V small

Axxess AXCSD-6V

• 12-volt to 6-volt step down converter
• Provides proper voltage for a 6V factory backup
• Includes a wiring harness with three wires

$34.99

List price $38.99

GLI-RCA small

Crux GLI-RCA

• Ground loop isolator
• RCA Male to female
• Universal

(1)

$13.50

List price $21.00

AXNF-1 small

Axxess AXNF-1

• Electronic Noise Suppressor Filter
• Actively cleans noises generated by sources
• Handles 35 watts of power
• New, smaller easy to mount design
• Molded channels so zip ties will not slip

$18.99

List price $21.99

GLI-3.5 small

Crux GLI-3.5

• Ground loop Isolator
• 3.5mm Male to female

$16.54

List price $25.73

Specifications & Details


Noise Filter Specifications
Noise Filter Type
Ground Loop Isolator
Number of Channels
2-Channel
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

B25N

Weight:

0.50lbs

Internal SKU:

b25n

Internal Product ID:

44156

Customer Ratings & Reviews


Boss B25N thumbnail image

5 star
50%
4 star
33%
3 star
17%
2 star
0%
1 star
0%



Durability
4.7
Value
4.7
Features
4.2
Design
3.9
Usability
4.9

Customer Reviews

Sort by:

Loading...

Highs or Lows

I installed one of these in my car between my head-unit and 15 band trunk EQ to stop engine noise i was having. After installing and turning on my car engine i was the happiest on the block, all my engine noise was gone, my mids and highs lit up my neighbourhood.
Con: My subwoofer was no longer recieving sub frequencies!!! So i was left with no engine noise and no bass.

By Cleon on April 22, 2012

10 found this helpful


Great Product!!

The product has a very good price for what it does. It came to me in a very short amount of time. East to install, no issues at all. Has been working ever since.
Again, never look for things like this any other places than Sonicelectronix. Don't waste your time in any other stores.

By Rene' on April 1, 2013

6 found this helpful


It worked

I installed a Car PC and it was plagued with all kinds of noise due to many ground loop issues. I installed the B25N before all of the amps and now it is totally silent.

The resulting dynamic range is amazing.

By George on February 12, 2013

6 found this helpful


Works as expected!

It's a simple product, bu it does what it says. A little large, but has some mounting holes, which is nice. Worked perfectly.

By Mike on December 5, 2012

5 found this helpful


Does the job at a great price

Needed to get some noise out of my Preouts and these did the job perfectly. A little bulky but work well

By Jason on March 31, 2013

5 found this helpful


Boss B25N

It works great to eliminate ground loop hum. I used it for diagnostic purposes.

By Sportflyer on December 23, 2012

4 found this helpful



OV1-2000D small

Power Acoustik OV1-2000D

OV Series Class D Monoblock Amplifier

(4)

$189.99

List price $299.99

GT1-6000D small

Power Acoustik GT1-6000D

6000W Max, Monoblock Class D Gothic Series Car Amplifier

(32)

$199.99

List price $539.99

RCA-iPD small

P.I.E. RCA-iPD

Universal iPod Dock to RCA Input Cable

(1)

$39.99

List price $55.99

Related Searches


Save up to 10 different vehicles in your garage
Vehicle
Store
Delete

1997 BMW 318i

2015 Audi S6

2019 Ford Mustang

2002 Lexus LS430

1985 Ford Thunderbird

2010 Chrysler 300

2022 Audi A3

2023 Audi e-tron Sportback

2005 Kia Spectra

2008 Saab 9-5

Vehicle
Store
Delete

2004 Harley Davidson FXSTD/I Softail Deuce

Add vehicle Clear all vehicles
Where to find vehicle info
Are you sure you want to clear your garage?
This action cannot be undone. Confirm
This page was not designed for products.
If you continue, you will be redirected to a category customized for your vehicle. Continue
Loading...
Identify your vehicle and submodel details
  • Owner's manual
  • Vehicle's insurance card
  • Vehicle registration
  • Vehicle produced after 2005: Inside driver's side door
  • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
Car Info Side Door Icon
Vehicle Registration Icon
Vehicle Insurance Icon

Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

  • You see only parts engineered for your exact vehicle
  • You avoid incompatible radios, speakers, or wiring
  • Installation is smoother, faster, and frustration-free
  • You get the correct accessories the first time

Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.