{"product_id":"xh-m802-passive-tone-control-board-treble-bass-volume","title":"XH-M802 Passive Tone Board – Treble, Bass \u0026 Volume PCB","description":"\u003ch2\u003eXH-M802 Passive Tone Board – 2-Channel Treble, Bass \u0026amp; Volume Control\u003c\/h2\u003e\n\u003cp\u003eTake full command of your audio signal with the \u003cstrong\u003eXH-M802 Passive Tone Control Board\u003c\/strong\u003e. Designed for DIY audio enthusiasts and electronics hobbyists, this compact PCB lets you independently adjust \u003cstrong\u003etreble, bass, and overall volume\u003c\/strong\u003e before the signal reaches your amplifier board — giving you cleaner, more refined sound output tailored to your setup.\u003c\/p\u003e\n\n\u003cp\u003eUnlike active tone circuits, this \u003cstrong\u003epassive tuning board requires no external power supply\u003c\/strong\u003e. It uses an RC (resistor-capacitor) filter network to sculpt the frequency response of your audio signal, filtering out unwanted highs or lows before amplification. It's an ideal front-end solution for subwoofer projects, custom speaker builds, or any 2-channel amplifier system.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMade in Mainland China.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePassive Design:\u003c\/strong\u003e No power supply needed — works entirely through the RC capacitor filter network\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e3-Knob Control:\u003c\/strong\u003e Independent adjustments for treble, bass, and master volume\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2-Channel Stereo:\u003c\/strong\u003e Supports stereo left\/right audio signal paths\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eXH2.54-3P Connector:\u003c\/strong\u003e Standard socket type for easy integration with amplifier boards\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Form Factor:\u003c\/strong\u003e Measures just 56 × 28 mm — fits into tight enclosures and DIY builds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMetal construction\u003c\/strong\u003e for durability and stable knob operation\u003c\/li\u003e\n  \u003cli\u003eKnob spacing: 22.5 mm for comfortable manual adjustment\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eXH-M802\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePassive Tone Control Board\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChannels\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2-Channel (Stereo)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAdjustable Controls\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTreble, Bass, Volume\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConnector\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eXH2.54-3P\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBoard Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e56 × 28 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eKnob Spacing\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e22.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Requirement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNone (passive)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMetal\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePackage Contents\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1× Passive Tone Control Board\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1× XH-M802 Passive Tone Control PCB Board\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/10-piece-complete-gardening-tool-kit\"\u003e10-Piece Gardening Tool Kit – Iron Head \u0026amp; Plastic Handle\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-2-inch-8-piece-hex-short-socket-set-vanadium-steel\"\u003e1\/2\" Drive 8-Piece Hex Short Socket Set – Vanadium Steel\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/105-degree-right-angle-driver-with-hex-screwdriver-bit\"\u003e105° Right Angle Driver with 1\/4\" Hex Screwdriver Bit\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/hand-power-tools\" target=\"_blank\" rel=\"noopener\"\u003eOSHA guidance on hand and power tools\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Does the XH-M802 passive tone board require a power supply to operate?\u003c\/h4\u003e\n\u003cp\u003eA: No. The XH-M802 is a passive tone control board, meaning it requires no external power supply. It uses an RC (resistor-capacitor) filter network to shape the audio signal. Please note that because it is passive, the processed signal volume will be somewhat lower than the input, which is normal — your downstream amplifier board compensates for this.\u003c\/p\u003e\n\u003ch4\u003eQ: What amplifier boards is the XH-M802 tone board compatible with?\u003c\/h4\u003e\n\u003cp\u003eA: The XH-M802 uses a standard XH2.54-3P socket connector, making it compatible with a wide range of DIY amplifier boards and subwoofer projects that accept this connector type. It works as a pre-amplifier tone stage — you connect your audio source to the tone board first, then route the output to your amplifier board for boosting.\u003c\/p\u003e\n\u003ch4\u003eQ: Can this board control treble and bass independently?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The XH-M802 features three separate knobs allowing you to independently adjust treble (high frequencies), bass (low frequencies), and overall master volume. This gives you precise tonal control over your audio signal before it is amplified.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Does the XH-M802 passive tone board require a power supply to operate?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No. The XH-M802 is a passive tone control board, meaning it requires no external power supply. 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The XH-M802 features three separate knobs allowing you to independently adjust treble (high frequencies), bass (low frequencies), and overall master volume. 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