{"product_id":"passive-tone-control-pcb-board-2-channel-treble-bass-preamp-module","title":"Passive Tone Control PCB Board – 2-Channel Bass \u0026 Treble Module","description":"\u003ch2\u003ePassive Tone Control Board – Precision Audio Preamp Module\u003c\/h2\u003e\n\u003cp\u003eTake full command of your audio output with the \u003cstrong\u003eLOTHYE Passive Tone Control PCB Board\u003c\/strong\u003e. Designed for DIY audio enthusiasts, hobbyists, and electronics builders, this compact 2-channel preamp module lets you independently adjust \u003cstrong\u003etotal volume, treble, and bass\u003c\/strong\u003e for a customized listening experience — no power supply required for the tone circuit itself.\u003c\/p\u003e\n\n\u003cp\u003eWhether you're building a custom speaker system, upgrading a home amplifier, or prototyping an audio project, this passive tone board delivers clean, accurate signal shaping in a small, easy-to-integrate form factor. Made in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e3 Adjustable Controls:\u003c\/strong\u003e Independent knobs for total volume, treble, and bass\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2-Channel Stereo:\u003c\/strong\u003e Dual-channel design for full left\/right audio control\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePassive Circuit:\u003c\/strong\u003e No active power needed for tone shaping — reduces noise and distortion\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Size:\u003c\/strong\u003e Appearance size of 56.28mm — fits easily into enclosures and DIY builds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eKnob Spacing:\u003c\/strong\u003e 22.5mm between knobs for comfortable panel mounting\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSocket Type:\u003c\/strong\u003e XH2.54~3P connectors for reliable, secure wiring\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePCB Construction:\u003c\/strong\u003e Clean board layout for easy soldering and integration\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e LOTHYE | Condition: New\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePassive Tone Control Module\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\u003eVolume, Treble, Bass\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eKnob Spacing\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e22.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSocket Type\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\u003e56.28mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eGreat Pairings for Your DIY Projects\u003c\/h3\u003e\n\u003cp\u003eLooking for more tools and electronics for your builds? Check out these related products from our store:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/electromagnetic-induction-tester-coil-motherboard-fault-detector\"\u003eElectromagnetic Induction Tester – Coil \u0026amp; Circuit Fault Detector\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/air-compressor-pressure-gauge-0-10-0-12-0-25-bar-hydraulic-diy\"\u003eAir Compressor Pressure Gauge 0-10\/0-12\/0-25 Bar | DIY Tool\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/eye-face-protection\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on eye and face protection\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Does this passive tone control board require an external power supply?\u003c\/h4\u003e\n\u003cp\u003eA: No — because it is a \u003cstrong\u003epassive tone board\u003c\/strong\u003e, the tone shaping circuit itself does not require a dedicated power supply. It operates on the signal passing through it, making it ideal for low-noise DIY audio preamp builds and amplifier projects.\u003c\/p\u003e\n\u003ch4\u003eQ: What audio parameters can I adjust with this PCB board?\u003c\/h4\u003e\n\u003cp\u003eA: The LOTHYE passive tone control board allows independent adjustment of \u003cstrong\u003etotal volume, treble (high frequencies), and bass (low frequencies)\u003c\/strong\u003e, giving you comprehensive tone control across a 2-channel stereo signal path.\u003c\/p\u003e\n\u003ch4\u003eQ: What connector type does this board use, and is it easy to wire?\u003c\/h4\u003e\n\u003cp\u003eA: The board uses \u003cstrong\u003eXH2.54~3P sockets\u003c\/strong\u003e, which are standard in DIY electronics projects. These connectors are secure, widely compatible, and straightforward to wire, making integration into custom amplifier builds or speaker systems simple and reliable.\u003c\/p\u003e\n\u003ch4\u003eQ: What is the size of this tone control PCB module?\u003c\/h4\u003e\n\u003cp\u003eA: The board measures \u003cstrong\u003e56.28mm\u003c\/strong\u003e in appearance size, with a knob spacing of \u003cstrong\u003e22.5mm\u003c\/strong\u003e. Its compact footprint makes it suitable for panel mounting in enclosures of various sizes.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Does this passive tone control board require an external power supply?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No — because it is a passive tone board, the tone shaping circuit itself does not require a dedicated power supply. 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