--- product_id: 3832207 title: "BOSS Audio Systems B65N High Level to RCA Converter for Car Sound Systems - Ground Loop Isolator for Crossover Stereo Equalizer Amplifier Subwoofer" brand: "boss audio systems" price: "₩43431" currency: KRW in_stock: true reviews_count: 13 category: "Boss Audio Systems" url: https://www.desertcart.kr/products/3832207-boss-audio-systems-b65n-high-level-to-rca-converter-car store_origin: KR region: South Korea --- # High-level to RCA conversion Reduces alternator noise Adjustable input sensitivity BOSS Audio Systems B65N High Level to RCA Converter for Car Sound Systems - Ground Loop Isolator for Crossover Stereo Equalizer Amplifier Subwoofer **Brand:** boss audio systems **Price:** ₩43431 **Availability:** ✅ In Stock ## Summary > 🎧 Elevate your ride’s sound game—hear every detail, skip the noise! ## Quick Answers - **What is this?** BOSS Audio Systems B65N High Level to RCA Converter for Car Sound Systems - Ground Loop Isolator for Crossover Stereo Equalizer Amplifier Subwoofer by boss audio systems - **How much does it cost?** ₩43431 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/3832207-boss-audio-systems-b65n-high-level-to-rca-converter-car) ## 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 - • **Precision Sound Control:** Fine-tune your audio with an adjustable input sensitivity knob, optimizing output for any speaker setup. - • **Plug-and-Play Simplicity:** No external power required—just connect and enjoy upgraded sound quality backed by a 1-year warranty. - • **Compact & Lightweight Design:** Sleek 3.4 x 1.5 x 1.5 inch form factor and just 0.25 lbs, perfect for discreet installation in any car or home audio system. - • **Crystal-Clear Audio Conversion:** Transforms amplified speaker outputs into pristine line-level RCA signals for seamless integration with active sound systems. - • **Noise-Free Listening Experience:** Effectively eliminates high-pitched alternator whine and ground loop interference, ensuring pure, uninterrupted sound. ## Overview The BOSS Audio Systems B65N is a high-level to RCA converter designed to upgrade car and home audio setups by converting amplified speaker outputs into clean line-level signals. It features noise reduction for alternator whine, adjustable input sensitivity for precise sound tuning, and a compact, lightweight design requiring no external power. Ideal for integrating active speakers or subwoofers, it ensures a distortion-free, high-fidelity listening experience backed by a 1-year warranty. ## Description desertcart.com: BOSS Audio Systems B65N High Level to RCA Converter for Car Sound Systems - Ground Loop Isolator for Crossover Stereo Equalizer Amplifier Subwoofer : Electronics Review: Worked for my Television setup - I bought the device to provide low level outputs from my television which has a set of low quality right/left speakers in its base. The original TV speakers are fed by amplified outputs cabled from the TV to its base. By inserting the BOSS Audio B65N into the TV speaker outs, I now was able to connect powered speakers which accept the line level output from the BOSS. What this accomplishes is - Clear line level output - Upgraded soundsystem (from the base TV speakers) - Original volume control With regard to the factory-set BOSS level settings, I turned up then down, and settled on the original levels as it was enough to provide clean output to the speakers until I reached what might be considered 7. The instructions do not indicate the range or factory set level and there are no markers so it is a guessing game where you end up using the position of the knobs to guess. I played several types of music on different TV audio settings to ensure I heard crisp cymbals, vocal midrange and decent techno-Hip-Hop Bass and the range the speaker outs/BOSS setup provided was just fine. Also note, that the BOSS requires no power which is a plus for my simple setup. Aesthetically speaking, the unit is lightweight and chrome painted plastic, at home for a automobile setup next to an amp, or show it off to impress unsuspecting friends in the home theater. Review: Remarkably apt for active HiFi speakers. - The Boss converter is a transformer with two primary windings, that accept the right and left stereo loudspeaker output from f.ex. a radio, a TV, or a cd-player, and with two corresponding secondary windings with line level signals for e.g. active speakers. The resistance of each of the primary windings is 17ohm, and energy dissipation in these resistances is no problem at the manufacturer's sensitivity setting, irrespective of the max. output of your amplifier. The relative size of each output signal - the sensitivity - is adjustable by an attenuator from zero to about 38% of the input signal. The converter is set a cautious 33% sensitivity by the manufacturer, and as an exersize I changed it downwards to 20%, (within 0.2%), a bit more suitable for the Dynaudio BM5A active speakers, that the converter is to serve. My primary signal is from a Pure Sirocco 550 radio/cd unit designed for 8 ohms speakers. The resistance of the output circuits of the converter, when set to 20%, was 3.3kohm and 2.1kohm respectively for the two output channels, as measured with a multimeter. This difference in resistance may carry over to the resulting signals for the two active speakers, but this I could not tell with mine. The frequency response of the Boss converter is perfectly linear from 20kHz to around 100Hz with a very gradual fall off, and 50Hz being only 4% down in output, 30Hz 7-8% down, and 20Hz about 50% down compared to the (100%) 20kHz to 100Hz range. This diminishment is not noticeable with the Dynaudio speakers, but the converter is less suited below 30Hz. The sensitivity adjustment of each output is through a 3/4 turn of a set-screw, clockwise for higher gain. I used a sine-wave generator and an oscilloscope + a multimeter for the measurements and settings, but a 1volt 50 or 60Hz signal plus an ac multimeter with a 1000mV range would suffice for setting the sensitivity, because the setting at 50Hz is valid throughout the frequency range. You will appreciate, that replacing passive speakers with active counterparts in your home stereo system is quite manageable. Simply leave the old cables in place (or replace them with lighter ones), swop the passive and active speakers, and affix a converter to the back of each of the active speakers, with the loudspeaker cables providing the primary input. To feed the converter's unbalanced output to the balanced input of my active speakers, I used an extra 4 inch mono phono cable (with a male plug) and soldered the center conductor to nr. 2 pin and the shield to the nr. 3 AND to the nr. 1 pin of an XLR connector for the input. The remaining hassle is to connect the active speakers to the mains supply. 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 experience. It may contribute to powerful Hi-Fi home stereo sound from a modestly priced radio/cd-player, via active, analogue speakers. One might argue for one star down, because, if not using the converter with the factory settings, accurate sensitivity adjustment is a bit cumbersome, as described, and documentation is very limited. The factory setting of 33% is perfectly sensible though, the only possible drawback being lower than usual nominal volume settings. ## Features - Reduces High Pitched Whine Alternator Noise caused by the car's electrical system - High Level to RCA Impedance Converter - Featuring Input Sensitivity Adjustment - Always Use High Quality RCA Cables for your Audio System - Dimensions - 3.4 x 1.5 x 1.5, Unit Weight: .25 Lbs. - Tips - Make sure that the amplifiers have a good ground first. Use at least 10 Gauge wires for the grounds (and power). If you have 2 or more amplifiers, DO NOT go from the ground terminal of one amp to the other and then from there to ground. - Tips - Ground each amplifier independently. Same thing if you have added stiffening capacitors, go to a separate ground for the cap. - 1 Year Warranty ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000LP4RMQ | | Best Sellers Rank | #959 in Car Audio & Video Accessories | | Brand | BOSS Audio Systems | | Built-In Media | Instruction Manual | | Color | Silver | | Compatible Devices | Car Audio Systems | | Connector Type | RCA | | Customer Reviews | 4.3 out of 5 stars 1,714 Reviews | | Finish | Rca | | Global Trade Identification Number | 00791489170062 | | Item Dimensions | 3.38 x 1.5 x 1.5 inches | | Item Type Name | BOSS Audio Systems B65N High Level to RCA Converter Noise Filter for Car Audio Systems | | Item Weight | 4 ounces | | Item dimensions L x W x H | 3.38 x 1.5 x 1.5 inches | | Manufacturer | BOSS Audio Systems | | Mfr Part Number | B65N | | Model Number | B65N | | Number of Items | 1 | | Number of Ports | 2 | | Package Quantity | 1 | | Power Plug Type | No Plug | | Specific Uses For Product | Car | | UPC | 115971572439 613815587897 791489170062 872182707028 172304208281 100010960445 829429302348 132018191132 | | Unit Count | 1 Count | | Warranty Description | 1 YEAR WARRANTY | | Warranty Type | Extended | ## Product Details - **Color:** Silver - **Compatible Devices:** Car Audio Systems - **Connector Type:** RCA - **Item dimensions L x W x H:** 3.38 x 1.5 x 1.5 inches - **Specific Uses For Product:** Car ## Images ![BOSS Audio Systems B65N High Level to RCA Converter for Car Sound Systems - Ground Loop Isolator for Crossover Stereo Equalizer Amplifier Subwoofer - Image 1](https://m.media-amazon.com/images/I/616oTgZ4IaL.jpg) ![BOSS Audio Systems B65N High Level to RCA Converter for Car Sound Systems - Ground Loop Isolator for Crossover Stereo Equalizer Amplifier Subwoofer - Image 2](https://m.media-amazon.com/images/I/71MGPasAmSL.jpg) ![BOSS Audio Systems B65N High Level to RCA Converter for Car Sound Systems - Ground Loop Isolator for Crossover Stereo Equalizer Amplifier Subwoofer - Image 3](https://m.media-amazon.com/images/I/71TVZyjgjSL.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 ## Customer Reviews ### ⭐⭐⭐⭐⭐ Worked for my Television setup *by C***R on January 7, 2015* I bought the device to provide low level outputs from my television which has a set of low quality right/left speakers in its base. The original TV speakers are fed by amplified outputs cabled from the TV to its base. By inserting the BOSS Audio B65N into the TV speaker outs, I now was able to connect powered speakers which accept the line level output from the BOSS. What this accomplishes is - Clear line level output - Upgraded soundsystem (from the base TV speakers) - Original volume control With regard to the factory-set BOSS level settings, I turned up then down, and settled on the original levels as it was enough to provide clean output to the speakers until I reached what might be considered 7. The instructions do not indicate the range or factory set level and there are no markers so it is a guessing game where you end up using the position of the knobs to guess. I played several types of music on different TV audio settings to ensure I heard crisp cymbals, vocal midrange and decent techno-Hip-Hop Bass and the range the speaker outs/BOSS setup provided was just fine. Also note, that the BOSS requires no power which is a plus for my simple setup. Aesthetically speaking, the unit is lightweight and chrome painted plastic, at home for a automobile setup next to an amp, or show it off to impress unsuspecting friends in the home theater. ### ⭐⭐⭐⭐⭐ Remarkably apt for active HiFi speakers. *by P***R on June 19, 2013* The Boss converter is a transformer with two primary windings, that accept the right and left stereo loudspeaker output from f.ex. a radio, a TV, or a cd-player, and with two corresponding secondary windings with line level signals for e.g. active speakers. The resistance of each of the primary windings is 17ohm, and energy dissipation in these resistances is no problem at the manufacturer's sensitivity setting, irrespective of the max. output of your amplifier. The relative size of each output signal - the sensitivity - is adjustable by an attenuator from zero to about 38% of the input signal. The converter is set a cautious 33% sensitivity by the manufacturer, and as an exersize I changed it downwards to 20%, (within 0.2%), a bit more suitable for the Dynaudio BM5A active speakers, that the converter is to serve. My primary signal is from a Pure Sirocco 550 radio/cd unit designed for 8 ohms speakers. The resistance of the output circuits of the converter, when set to 20%, was 3.3kohm and 2.1kohm respectively for the two output channels, as measured with a multimeter. This difference in resistance may carry over to the resulting signals for the two active speakers, but this I could not tell with mine. The frequency response of the Boss converter is perfectly linear from 20kHz to around 100Hz with a very gradual fall off, and 50Hz being only 4% down in output, 30Hz 7-8% down, and 20Hz about 50% down compared to the (100%) 20kHz to 100Hz range. This diminishment is not noticeable with the Dynaudio speakers, but the converter is less suited below 30Hz. The sensitivity adjustment of each output is through a 3/4 turn of a set-screw, clockwise for higher gain. I used a sine-wave generator and an oscilloscope + a multimeter for the measurements and settings, but a 1volt 50 or 60Hz signal plus an ac multimeter with a 1000mV range would suffice for setting the sensitivity, because the setting at 50Hz is valid throughout the frequency range. You will appreciate, that replacing passive speakers with active counterparts in your home stereo system is quite manageable. Simply leave the old cables in place (or replace them with lighter ones), swop the passive and active speakers, and affix a converter to the back of each of the active speakers, with the loudspeaker cables providing the primary input. To feed the converter's unbalanced output to the balanced input of my active speakers, I used an extra 4 inch mono phono cable (with a male plug) and soldered the center conductor to nr. 2 pin and the shield to the nr. 3 AND to the nr. 1 pin of an XLR connector for the input. The remaining hassle is to connect the active speakers to the mains supply. 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 experience. It may contribute to powerful Hi-Fi home stereo sound from a modestly priced radio/cd-player, via active, analogue speakers. One might argue for one star down, because, if not using the converter with the factory settings, accurate sensitivity adjustment is a bit cumbersome, as described, and documentation is very limited. The factory setting of 33% is perfectly sensible though, the only possible drawback being lower than usual nominal volume settings. ### ⭐⭐⭐⭐ Looks cheap, but works well *by T***Y on September 26, 2013* I bought this to connect to a high power amp to extract the signals for a Bluetooth transmitter. This let me flip a switch to turn off the speakers and listen via BT wireless when everyone else is asleep. For my use case, the converter is perfect. The volume levels were not problem to adjust and the BT transmitter is happy with the signal levels. I can still use the remote on the amp to adjust the volume. Hook up was easy and took all of about 5 minutes. I really like it. ## Frequently Bought Together - BOSS Audio Systems B65N High Level to RCA Converter Noise Filter for Car Audio Systems - BOSS Audio Systems KIT2 8 Gauge Complete Car Amplifier Installation Wiring Kit with Power Cables, Ground Cables, Turn-On Wire, Speaker Wire, Terminals --- ## 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.kr/products/3832207-boss-audio-systems-b65n-high-level-to-rca-converter-car](https://www.desertcart.kr/products/3832207-boss-audio-systems-b65n-high-level-to-rca-converter-car) --- *Product available on Desertcart South Korea* *Store origin: KR* *Last updated: 2026-07-24*