--- product_id: 176988944 title: "RCA Amplifier Audio Systems Ground Loop Isolator B25N noise Filter for Car Audio Systems, White" brand: "boss audio systems" price: "¥5736" currency: JPY in_stock: true category: "Boss Audio Systems" url: https://www.desertcart.jp/products/176988944-rca-amplifier-audio-systems-ground-loop-isolator-b25n-noise-filter store_origin: JP region: Japan --- # Eliminates alternator whine Compact 3.4x1.5x1.5 inch size Noise reduction tech RCA Amplifier Audio Systems Ground Loop Isolator B25N noise Filter for Car Audio Systems, White **Brand:** boss audio systems **Price:** ¥5736 **Availability:** ✅ In Stock ## Summary > 🔊 Cut the noise, keep the vibe — drive your sound like a boss! ## Quick Answers - **What is this?** RCA Amplifier Audio Systems Ground Loop Isolator B25N noise Filter for Car Audio Systems, White by boss audio systems - **How much does it cost?** ¥5736 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/176988944-rca-amplifier-audio-systems-ground-loop-isolator-b25n-noise-filter) ## Best For - boss audio systems enthusiasts ## Why This Product - Trusted boss audio systems brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Silence the Static:** Effectively reduces high-pitched alternator noise for crystal-clear audio. - • **Dual Channel Clarity:** Supports 2-channel systems ensuring balanced noise isolation. - • **Plug & Play Precision:** Compact, lightweight design fits seamlessly into any car audio setup. - • **Trusted Audio Upgrade:** Join thousands of users who’ve elevated their car sound experience. - • **Pro-Grade Installation Tips:** Optimized grounding advice for maximum noise filtration performance. ## Overview The BOSS B25N Ground Loop Isolator is a compact, dual-channel noise filter designed to eliminate high-pitched alternator whine in car audio systems. Engineered for easy installation with professional grounding tips, it ensures a clean, interference-free listening experience, making it a must-have upgrade for audiophiles seeking flawless in-car sound. ## Description BOSS RCA Amplifier Audio Systems Ground Loop Isolator B25N noise Filter for Car Audio Systems, White : desertcart.in: Electronics ## Features - 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 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000LP4RMG | | Best Sellers Rank | #327,077 in Electronics ( See Top 100 in Electronics ) #21 in Car & Vehicle Noise Filters | | Brand | BOSS Audio Systems | | Brand Name | BOSS Audio Systems | | Country of Origin | USA | | Customer Reviews | 3.8 out of 5 stars 2,533 Reviews | | Global Trade Identification Number | 00791489170055 | | Included Components | BOSS Audio Systems Ground Loop Isolator B25N noise Filter for Car Audio Systems | | Item Dimensions | 8.6 x 3.8 x 3.8 Centimeters | | Item Weight | 0.25 Pounds | | Item dimensions L x W x H | 8.6 x 3.8 x 3.8 Centimeters | | Manufacturer | Boss Audio Systems, Inc. | | Material Type | Metal Plastic | | Model Number | B25N | | Mounting Type | Surface Mount | | Number of Channels | 2 | | Package Type Name | Standard_packaging | | Part Number | B25N | | UPC | 809187135679 163121368371 809386486756 132018222775 019372806240 804066817783 791489170055 807031767632 115971573498 808112581604 808112397250 978654254783 | | Unit Count | 1.0 Count | | Warranty Description | no warranty available | ## Product Details - **Brand:** BOSS Audio Systems - **Item dimensions L x W x H:** 8.6 x 3.8 x 3.8 Centimeters - **Manufacturer:** Boss Audio Systems, Inc. - **Mounting Type:** Surface Mount - **Number of Channels:** 2 ## Images ![RCA Amplifier Audio Systems Ground Loop Isolator B25N noise Filter for Car Audio Systems, White - Image 1](https://m.media-amazon.com/images/I/61TchapzvSL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: can someone explane to me what this does as if i were a complete idiot?** A: The ground isolator removes ground noise caused by other components in the power system of your audio devices, it does this by decoupling the amplifier from the audio source directly, wires wrapped around in a transformer allow the audio signal to pass through induction but leave the ground isolated. So any noise on the ground line is not sent to the audio input of the amplifier. **Q: Can I insert this filter between my power amp and preamp in my home audio system to fix the hum problem?** A: Your hum problem is likely between your preamp and one of its inputs. Disconnect each in turn to see which is the problem. Use this there. It breaks the earth loop. If you put it between the pre and power amp, the hum is already in the audio signal, so it would not be effective at that point. **Q: Will this eliminate the buzz between my record player and receiver?** A: You can usually eliminate hum between your record player and your phono stage input by grounding the two devices together with a dedicated wire, usually built-in to the record player, which attaches to a stud on the phono preamp or stereo. Hope this helps. **Q: Will this work for a CB radio?** A: sure, it filters out noise from the power wire ## Frequently Bought Together - BOSS Audio Systems Ground Loop Isolator B25N noise Filter for Car Audio Systems - DteeDck RCA Splitter 1 Female to 2 Male, 2 Pack - RCA Audio Video Cable Splitter Adapter, Dark Blue - Monoprice 1.5ft Premium 2 RCA Plug/2 RCA Plug M/M 22AWG Cable - Black --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/176988944-rca-amplifier-audio-systems-ground-loop-isolator-b25n-noise-filter](https://www.desertcart.jp/products/176988944-rca-amplifier-audio-systems-ground-loop-isolator-b25n-noise-filter) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-09-04*