{"product_id":"xh-a901-digital-audio-amplifier-tone-control-board-treble-bass-preamp","title":"XH-A901 Digital Audio Amplifier Tone Control Board — Treble \u0026 Bass Adjustment Preamp","description":"\u003ch2\u003eXH-A901 Digital Audio Amplifier Tone Control Board — Treble \u0026amp; Bass Adjustment\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eXH-A901 tone control board\u003c\/strong\u003e is a standalone audio preamplifier and tone control module that adds independent \u003cstrong\u003etreble and bass adjustment\u003c\/strong\u003e to any audio amplifier chain. Insert it between your audio source and power amplifier to shape the frequency response to your preference — boost bass for fuller sound, cut treble to tame harsh recordings, or set flat for reference listening. Suitable for DIY amplifier builds, active speaker systems, and home audio upgrades.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eXH-A901\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eTone control preamp (treble + bass independent adjustment)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003eDC 5V – 12V (check variant)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eInput\u003c\/td\u003e\n\u003ctd\u003eStereo RCA or 3.5mm (check board version)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eOutput\u003c\/td\u003e\n\u003ctd\u003eStereo line-level output\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eTreble Adjustment\u003c\/td\u003e\n\u003ctd\u003eOnboard potentiometer (±10dB typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eBass Adjustment\u003c\/td\u003e\n\u003ctd\u003eOnboard potentiometer (±10dB typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eChannel\u003c\/td\u003e\n\u003ctd\u003eStereo (2-channel)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eCN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Add a Tone Control Stage?\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompensate for room acoustics\u003c\/strong\u003e — Boost bass in acoustically dead rooms; cut treble in rooms with excessive high-frequency reflections\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSource matching\u003c\/strong\u003e — Adjust for the tonal character of different sources (vinyl, streaming, Bluetooth) without changing amplifier settings\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpeaker compensation\u003c\/strong\u003e — Tailor the frequency response to complement your specific speaker’s characteristics\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSimple integration\u003c\/strong\u003e — Line-level in\/out; insert between any source and power amplifier with no modification to existing equipment\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact form factor\u003c\/strong\u003e — Small PCB fits inside amplifier enclosures or mounts on a panel with the potentiometer shafts exposed\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTypical Applications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eDIY Class D \/ Class AB amplifier tone control stage\u003c\/li\u003e\n  \u003cli\u003eActive speaker system preamp with tone shaping\u003c\/li\u003e\n  \u003cli\u003eHome theater subwoofer bass boost control\u003c\/li\u003e\n  \u003cli\u003eGuitar and instrument amplifier tone stack replacement\u003c\/li\u003e\n  \u003cli\u003eVintage amplifier tone control restoration\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eQ: Does this board include a volume control?\u003c\/h3\u003e\n\u003cp\u003eThe XH-A901 focuses on tone control (treble and bass). Some versions include a volume potentiometer — check the product images for your specific board revision. If a separate volume control is needed, add a stereo potentiometer (10k–50kΩ log taper) at the input.\u003c\/p\u003e\n\n\u003ch3\u003eQ: What is the signal-to-noise ratio?\u003c\/h3\u003e\n\u003cp\u003eSpecific SNR data varies by board revision. For best noise performance, use a well-regulated, low-ripple DC supply and keep signal wiring short and away from the power input traces.\u003c\/p\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1× XH-A901 Tone Control Board\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Keszoox","offers":[{"title":"XH-A901","offer_id":46985507668203,"sku":"14:1202#XH-A901","price":17.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/xh-a901-digital-audio-amplifier-tone-board.webp?v=1761278571","url":"https:\/\/keszoox.com\/products\/xh-a901-digital-audio-amplifier-tone-control-board-treble-bass-preamp","provider":"Keszoox","version":"1.0","type":"link"}