This listing sold on Fri, Aug 1 at 6:12 PM.
BOSS Audio Systems B25N Noise Filter for Car Sound Systems, Ground Loop Isolator
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BOSS Audio Systems B25N Noise Filter for Car Sound Systems, Ground Loop Isolator
US $12.99US $12.99
Fri, Aug 01, 06:12 PMFri, Aug 01, 06:12 PM
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BOSS Audio Systems B25N Noise Filter for Car Sound Systems, Ground Loop Isolator

Jegli31
(3170)
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US $12.99
Condition:
New
Out of Stock5 sold
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    Located in: Doylestown, Ohio, United States
    Delivery:
    Estimated between Sat, Aug 30 and Sat, Sep 6 to 94104
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    eBay item number:157059120041
    Last updated on Jul 20, 2025 16:28:21 PDTView all revisionsView all revisions

    Item specifics

    Condition
    New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is ...
    Brand
    BOSS Audio Systems
    Type
    Noise Filter
    MPN
    B25N
    UPC
    791489170055
    Category

    Item description from the seller

    About this seller

    Jegli31

    99.4% positive feedback•9.2K items sold

    Joined Nov 2014
    Usually responds within 24 hours
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    Detailed seller ratings

    Average for the last 12 months
    Accurate description
    4.9
    Reasonable shipping cost
    5.0
    Shipping speed
    5.0
    Communication
    5.0

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      • v***v (1527)- Feedback left by buyer.
        Past month
        Verified purchase
        Ground loop doesn't work
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      Product ratings and reviews

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      4.2
      96 product ratings
      • 65 users rated this 5 out of 5 stars
      • 11 users rated this 4 out of 5 stars
      • 5 users rated this 3 out of 5 stars
      • 6 users rated this 2 out of 5 stars
      • 9 users rated this 1 out of 5 stars

      Easy to install

      Easy to operate

      Good value

      Most relevant reviews

      See all 71 reviews
      • by tbarb1345
        Aug 23, 2016Top favorable review

        Great Product

        My sound system sounded fine when the car was turned off, but when I started the car it would make this loud whining sound. If I revved the engine it would raise in pitch. I found out it was most likely being caused by noise from the alternator and that a noise suppressor could work. This was the cheapest one I could find and it matched the brand of the amp i bought so I said what the hell. I have to admit that I didnt believe it would work and I would end up still taking it to a shop. But I plugged it in and it worked like a charm. No noise at all! Great buy!

        Verified purchase: YesCondition: NewSold by: jb-tools

      • by WVnY4-QKT9S@Deleted
        Jan 28, 2016Top critical review

        Hooked item to same brand deck and had no difference, not happy with Boss nothing

        I hooked item up to same name brand cd tv deck, had no effect same engine noise, hum etc.

        Verified purchase: YesCondition: NewSold by: my_audio_empire

      • by wombatguy2789
        Jun 28, 2016

        Boss Audio Ground Loop Insulators

        I was having low "alternator whine" sounds coming out of my speakers with a 1600watt MOSFET installed in the trunk despite grounding both the MOSFET's to the chasis as well as the recievers ground. I plugged this in directly to the amp and the other end going to the reciver and I instantly the alternator noise was gone. I turn my speakers to the max as a stress test to see if there was much difference and clarity...and really....if there was any difference I sure couldn't tell but the fact of the matter it elimated that annoying buzzy alternator revving RPM sound and even the floor noise and everything sounds so much better. I especially like this because I mounted these in the trunk so they don't shake all over the place and stay put while driving.

        Verified purchase: YesCondition: NewSold by: jb-tools

      • by cellsandmore
        Feb 11, 2020

        Good buy

        Had whining and static coming through speakers from the alternator because of the 1,000 watt amp running my interior speakers. Connected the noise filter, and now it gone!! Only downside is it decreases music volume by a small percent but other than that it’s a great product if you have multiple subs and amps!!

        Verified purchase: YesCondition: NewSold by: jb-tools

      • by kev1mz
        Jul 15, 2017

        What a shame

        I bough a boss amp it was good then an 8 inch sub that works pretty good and then I got this worthless piece of plastic. I thought it was of good quality based on previous purchases but it's just plastic and the rcv attached to it had a bad connection and when it's close to ground the noise on the speakers is unbearable. Very dissapointed and will rethink future purchases from this brand now.

        Verified purchase: YesCondition: NewSold by: audiosavings

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