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$14.44
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Arrives before Father's Day

0.13 mi | Chicago 60602

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BOSS Audio Systems Ground Loop Isolator B25N noise Filter for Car Audio Systems

4.0 4.0 out of 5 stars 4,508 ratings
$14.44
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Ground Loop Isolator
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Purchase options and add-ons

Specific Uses For Product personal
Connector Type RCA
Color WHITE
Item dimensions L x W x H 3.38 x 1.5 x 1.5 inches
Brand BOSS Audio Systems

About this item

  • Reduces High Pitched Whine Alternator Noise caused by the car's electrical system
  • Ground Loop Isolator Noise Filter
  • Always Use High Quality RCA Cables for your Audio System
  • Dimensions: 3.4 x 1.5 x 1.5, Unit Weight: .30 Lbs. Tips: Ground each amplifier independently. Same thing if you have added stiffening capacitors, go to a separate ground for the cap

Additional Details

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Customer reviews

4 out of 5 stars
4 out of 5
4,508 global ratings

Customers say

Customers like the value and ease of use of the adapter. They say it's simple to install and works great for the price. However, some customers have reported issues with the volume and material of the product. They mention that the housing is cheap plastic designed to look like metal and that the cover is a little cheesy chrome plated plastic. Opinions are mixed on quality, noise, signal quality, and performance.

AI-generated from the text of customer reviews

106 customers mention103 positive3 negative

Customers find the electronic adapter easy to install and connect into the system. They also say the instructions are decent and it works with zero fuss. Some say the adapter is exemplary in low cost and simplicity.

"This thing did exactly what I needed it to. Installed in less than 5 minutes. My engine noise within the speakers were gone instantly. Great product." Read more

"...The Boss converter, exemplary in low cost and simplicity, is a perfect Hi-Fi level converter with no noise and no distortion in my listening..." Read more

"...It took me less than a minute to install. It's a plug and play thing so no tools necessary. And BAM! The low humming sound was GONE!..." Read more

"Easy to install but only took out about 75% of the noises. some days are better than others." Read more

85 customers mention85 positive0 negative

Customers appreciate the value of the adapter. They say it works well for the price and is well worth the price.

"Its cheap and works for what I need it to do but the input and outputs are flipped around...." Read more

"This product has helped me with sound Car Audio I think it was worth the buy." Read more

"...The Boss converter, exemplary in low cost and simplicity, is a perfect Hi-Fi level converter with no noise and no distortion in my listening..." Read more

"...AKA, this product fixed my problem cheaply and effectively...." Read more

511 customers mention302 positive209 negative

Customers have mixed opinions about the noise the adapter makes. Some say it removes any noticeable audio noise, while others say it filters out all the hum.

"...Don't hesitate if using inline converter! I haven't noticed any bass loss or volume either...." Read more

"...It solved my issue and now my audio sounds great! 2 second install and it fixed what I was trying for hours to figure out." Read more

"...The whining static like in and out white noise morhed with a high pitched sound of a few kilohertz was unbearable especially since my new sound..." Read more

"This product has helped me with sound Car Audio I think it was worth the buy." Read more

412 customers mention285 positive127 negative

Customers are mixed about the performance of the adapter. Some mention it works well, while others say it prevents it from working correctly.

"This product works amazingly and it took out all of my noise problems!!!..." Read more

"Installed a backup camera and monitor in my older car. All worked well, except there was a lot of noise on the monitor...." Read more

"...noise was still there but more tolerable but the machine's performance was significantly diminished.. Frustrated with performance I went back up in..." Read more

"...For reference to others, this works perfectly well on home A/V setups as well as automotive, although this product only addresses one specific type..." Read more

227 customers mention112 positive115 negative

Customers are mixed about the quality of the adapter. Some mention that it has a nice, clean sound, and is of great quality. Others say that it feels cheap and has mediocre build quality.

"...Thankyou for the good quality! Quality is very important!..." Read more

"...Not a big deal just flip the wires around but that's poor quality control at the factory...." Read more

"...It's a great looking unit and it's just not designed for this application. It is designed to work on audio cables...." Read more

"...battery and had the same whine which leads me to believe it is the cheap amps...." Read more

23 customers mention15 positive8 negative

Customers are mixed about the signal quality of the adapter. Some mention it works great with little to no loss in signal quality, and the BT transmitter is happy with the signal levels. Others say that the attenuation of the signal is pretty extreme, and it dramatically reduces output in that range.

"...I highly recommend this product it works. I experienced no audible signal loss as some reviewers claimed but I did experience full noise loss...." Read more

"This box is cheap but it rolls off the signal under 20hz so you lose output in that range...." Read more

"...it also does a good job at cleaning up the onboard audio card on a computer quite nicely...." Read more

"...Now with this in place and a noticeably cleaner input, my next thousand hours will be tuning the sound system for that flat response...." Read more

43 customers mention3 positive40 negative

Customers are not happy with the material of the adapter. They mention that the housing is cheap plastic designed to look like metal, and the cover is also low grade plastic. The shiny plastic definitely makes it feel cheap, and it's brittle.

"...care, but maybe some of you would be concerned because the casing is not made of metal as it appears to be. It's plastic...." Read more

"...Cons:- Housing is shiny plastic...." Read more

"...The shiny plastic definitely makes it feel cheap. They should've just gone for a more flat color instead. I mean, who wants fake chrome anyway?..." Read more

"...The body is plastic with fake cooling fins, which is silly because there should never be enough heat to matter in this type of device...." Read more

27 customers mention7 positive20 negative

Customers are dissatisfied with the volume of the adapter. They mention that it flips the audio onto the opposite channel, causes significant chaos, and filters out all music. They also say that it blocks all sound and consumes all of the sound signal.

"...I believe they reversed left and right channels (I need to verify this, can't really remember) but a quick visit to youtube for a stereo test on the..." Read more

"...My complaint is that the left and right channels actually switch in the box. So the red wire on one end goes to the white on the other end...." Read more

"...is a perfect Hi-Fi level converter with no noise and no distortion in my listening experience...." Read more

"...I did appear to cut out the hum. However it also cut out most of the middle frequencies as well...." Read more

Dispositivo funcional
5 Stars
Dispositivo funcional
Vendedor serio 100% recomendado, al instalarlo redujo un 90% el ruido del alternador pero hace falta realizar el puente entre el negativo de la radio y el negativo del amplificador para reducir aún más el ruido del alternador.
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Top reviews from the United States

Robert Montgomery
5.0 out of 5 stars Noise filter fix
Reviewed in the United States on May 31, 2024
Style: Ground Loop IsolatorVerified Purchase
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Wayne
5.0 out of 5 stars Listening to music is probably my favorite hobby. I went through three different home built ...
Reviewed in the United States on August 8, 2016
Style: Ground Loop IsolatorVerified Purchase
5 people found this helpful
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Simon W.
1.0 out of 5 stars Didn't work at all
Reviewed in the United States on May 8, 2024
Style: Ground Loop IsolatorVerified Purchase
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Linda
4.0 out of 5 stars Did not improve backup camera picture
Reviewed in the United States on April 11, 2023
Style: Ground Loop IsolatorVerified Purchase
One person found this helpful
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Tyler
5.0 out of 5 stars Works great!
Reviewed in the United States on June 2, 2024
Style: Ground Loop IsolatorVerified Purchase
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HiTek21
3.0 out of 5 stars Works but poor quality control.
Reviewed in the United States on October 15, 2017
Style: Ground Loop IsolatorVerified Purchase
5 people found this helpful
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Honest Critic
5.0 out of 5 stars Speaker whine gone!
Reviewed in the United States on June 2, 2024
Style: Ground Loop IsolatorVerified Purchase
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Top reviews from other countries

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HectorJT
5.0 out of 5 stars Excelente producto
Reviewed in Mexico on March 7, 2023
Style: Ground Loop IsolatorVerified Purchase
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Manuel M
3.0 out of 5 stars É arrivato con la scatola già aperta
Reviewed in Italy on September 19, 2023
Style: Ground Loop IsolatorVerified Purchase
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Manuel M
3.0 out of 5 stars É arrivato con la scatola già aperta
Reviewed in Italy on September 19, 2023
É arrivato con la scatola già aperta, quindi qualche reso di qualcuno… l’impacchettamento del pacco era integro invece.
Per il momento pare che funziona… essendo usato o un reso di qualcuno però voglio vedere se continua a fare bene il suo lavoro e per quanto tempo… sperando che non sia difettato…
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Alex Gutiérrez
5.0 out of 5 stars Funciona perfecto
Reviewed in Spain on June 17, 2023
Style: Ground Loop IsolatorVerified Purchase
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Juggyjug
5.0 out of 5 stars Perfect little device to convert high to low sounds.
Reviewed in Canada on March 4, 2021
Style: Noise FilterVerified Purchase
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Giulia De Rossi
5.0 out of 5 stars Ottimo
Reviewed in Italy on April 21, 2021
Style: Noise FilterVerified Purchase
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