{"product_id":"fosi-audio-zp3-preamplifier-with-3-in-3-out-xlr-rca-sub-out-hifi-preamp-with-hpf-high-pass-filter-tone-control","title":"Fosi Audio ZP3 Preamplifier with 3-in\/3-out XLR\/RCA\/SUB OUT HiFi Preamp with HPF High Pass Filter Tone Control","description":"\u003ch1\u003eSPECIFICATIONS\u003c\/h1\u003e\u003cp\u003e\u003cspan\u003eBrand Name\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eFosi Audio\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eChannels\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e2 (2.0)\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eFOSI AUDIO Model\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eZP3\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eHigh-concerned chemical\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eNone\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eMaximum Power Per Channel\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eNO POWER\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eOrigin\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eMainland China\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003ePackage\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eYes\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cdiv class=\"detailmodule_dynamic\"\u003e\u003ckse:widget data-widget-type=\"customText\" id=\"1005000000920131\" type=\"custom\"\u003e\u003c\/kse:widget\u003e\u003c\/div\u003e\u003cdiv class=\"detailmodule_html\"\u003e\u003cdiv class=\"detail-desc-decorate-richtext\"\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cimg width=\"944\" height=\"393\" src=\"https:\/\/ae01.alicdn.com\/kf\/S33cab5e6eb764d498810341704362f97a.jpg\" slate-data-type=\"image\"\u003e\u003c\/p\u003e\n\u003cdiv class=\"detailmodule_dynamic\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"detailmodule_html\"\u003e\u003cdiv class=\"detail-desc-decorate-richtext\"\u003e\n\u003cdiv\u003e\n\u003cbr\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"detailmodule_text\"\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cdiv\u003e\u003cdiv\u003e\u003cdiv\u003e\u003cdiv\u003e\u003cdiv\u003e\u003cdiv\u003e\u003cdiv class=\"detailmodule_media\"\u003e\u003cdiv class=\"video-container-5000263084557\"\u003e\u003cdiv class=\"detail-video\" id=\"5000263084557\" data-previewurl=\"https:\/\/ae01.alicdn.com\/kf\/S6dde2639d51242e9a8f57920808a4172v.jpg\"\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cspan style=\"background-color:rgb(252, 220, 0);font-size:18px\"\u003e\u003cstrong\u003eTIPS ：\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"background-color:rgb(252, 220, 0);font-size:18px\"\u003e\u003cstrong\u003e1.Please pay attention to whether the power plug you have selected is correct when placing an order\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"background-color:rgb(252, 220, 0);font-size:18px\"\u003e2.The 2026 edition of the ZP3 orange knob will no longer feature a dot.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp style=\"font-family:OpenSans;font-size:20px;font-weight:900;line-height:28px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-title\"\u003eFeature\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"detailmodule_text\"\u003e\n\u003cp style=\"font-size:16px\"\u003e1.Home Audio Control Hub\u003c\/p\u003e\n\u003cp style=\"font-family:OpenSans;font-size:14px;font-weight:300;line-height:20px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-content\"\u003eFeatures 3-in-3-out options for connecting up to three audio sources. Includes a remote control for one-touch input switching and volume adjustment—making it easy to manage your home audio system with freedom\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"detailmodule_text\"\u003e\n\u003cp style=\"font-size:16px\"\u003e2.Versatile Connectivity\u003c\/p\u003e\n\u003cp style=\"font-family:OpenSans;font-size:14px;font-weight:300;line-height:20px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-content\"\u003eEquipped with RCA1\/RCA2\/XLR inputs and RCA\/XLR\/Sub-Out outputs, the ZP3 integrates multiple devices with ease. Supports balanced XLR in\/out for cleaner sound, plus RCA\/XLR signal conversion for maximum compatibility\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"detailmodule_text\"\u003e\n\u003cp style=\"font-size:16px\"\u003e3.Audiophile-Grade Components\u003c\/p\u003e\n\u003cp style=\"font-family:OpenSans;font-size:14px;font-weight:300;line-height:20px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-content\"\u003eBuilt with premium parts including ELNA capacitors, NJR NJU72315 volume IC, and gold-plated RCA jacks. These components reduce noise and distortion, delivering exceptional clarity and high-fidelity performance\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"detailmodule_text\"\u003e\n\u003cp style=\"font-size:16px\"\u003e4.Adjustable High-Pass Filter\u003c\/p\u003e\n\u003cp style=\"font-family:OpenSans;font-size:14px;font-weight:300;line-height:20px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-content\"\u003eThree-level HPF settings filter low-frequency signals from the RCA\/XLR outputs, sending only mids and highs to main speakers while routing bass through the SUB-OUT—enhancing clarity, detail, and overall sound balance\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"detailmodule_text\"\u003e\n\u003cp style=\"font-size:16px\"\u003e5.Flexible Sound Customization\u003c\/p\u003e\n\u003cp style=\"font-family:OpenSans;font-size:14px;font-weight:300;line-height:20px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-content\"\u003eIncludes bass\/treble control with bypass function, and L\/R balance knobs for personalized adjustment. Volume memory remembers settings for each input source—giving you a smarter, more convenient audio experience tailored to your taste\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"detailmodule_text\"\u003e\n\u003cp style=\"font-family:OpenSans;font-size:20px;font-weight:900;line-height:28px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-title\"\u003eSpecification\u003c\/p\u003e\n\u003cp style=\"font-size:13px\"\u003eProduct model: ZP3\u003cbr\u003eChannel: 2.0\u003cbr\u003eInput interface: RCA x2, XLR\u003cbr\u003eOutput interfaces: RCA, XLR, SUB\u003cbr\u003eHigh and low frequency adjustment range: high frequency (± 6dB), low frequency (± 12dB)\u003cbr\u003eFrequency response:\u003cbr\u003eXLR\/RCA\u003cbr\u003e20Hz-20kHz (±0.2dB)\u003cbr\u003e80Hz-20kHz (±0.2dB)\u003cbr\u003e120Hz-20kHz (±0.2dB)\u003cbr\u003eSUB \u003cbr\u003e20Hz-200Hz (±0.2dB)\u003cbr\u003eInput current and voltage: AC 110-240V\u003cbr\u003e\u003cbr\u003eBalance line output performance parameters (XLR):\u003cbr\u003eSignal to noise ratio ≥ 112 dB\u003cbr\u003eDynamic range ≥ 112 dB\u003cbr\u003eDistortion ≤ 0.0007%\u003cbr\u003eNoise ≤ 6 μ V\u003cbr\u003e\u003cbr\u003eSingle ended line output performance parameters (RCA):\u003cbr\u003eSignal to noise ratio ≥ 115 dB\u003cbr\u003eDynamic range ≥ 115 dB\u003cbr\u003eDistortion ≤ 0.0008%\u003cbr\u003eNoise ≤ 4 μ V\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"detailmodule_image\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"detailmodule_image\"\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cstrong\u003eQA:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv class=\"detailmodule_image\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"detailmodule_image\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size:20px\"\u003eQ1:Why aren't the bass and treble knobs working?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003eBypass mode may be enabled — in this mode, the signal bypasses the tone control circuit.\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cp\u003e\u003cspan style=\"font-size:20px\"\u003e\u003cstrong\u003eQ2:Which operational amplifiers can be replaced in the ZP3?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003eBurson V7V, TI LME49720, JRC4580D, MUSES02, Sparkos SS3602, etc.\u003c\/div\u003e\n\u003cdiv class=\"detailmodule_image\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"detailmodule_image\"\u003e\u003cspan style=\"font-size:20px\"\u003e\u003cstrong\u003eQ3:Is the volume knob on the ZP3 an electric potentiometer or an encoder?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003eThe volume knob is a rotary encoder that can rotate 360°, but the volume reaches a maximum limit and further rotation does not increase the volume.\u003c\/div\u003e\n\u003cdiv class=\"detailmodule_image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Sc3a15a4a5b474f238ba5709899f6a177Q.jpg\" slate-data-type=\"image\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"detailmodule_image\"\u003e\n\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S3c239d94230846759ca9247f4d2217622.png\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Scc0f834be37e40ec8efd6004e47f6ac6t.png\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S45a2646675704483b9d982055540b7e4f.png\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S9546b1949bf34b7fa2f0f1d1d87a2f2ej.png\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S8e75503d1b6943a48fb80de8a026837dR.png\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S711130aaaf5a4b729ed794b24f3d089ck.png\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Sd46c6b48159c4f66b22e9aa6d3e28df0H.png\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Sd2d50db1a81b4d94b88628928bd1bb9be.png\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Sd72038604a714aa8b19447496a74b2e0g.png\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S8243aa1e85f547f6ae6b7a6058811eb5C.png\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S472876db10df438c888ae9fc64c72cfbx.png\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S885e8f8c77234505b94bea4b69ea3c227.png\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S8108f51cdd404039bab4b2faed56325d1.png\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S7240134dd62d4a31929284ffd2c60c5fK.png\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S18fc827fedf14564b3f06dc8b396f8f4z.png\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S73bac5a30f134779ab94603599759bc6k.png\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Saefd15652b864e839edb2f85b66c532bc.png\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Sf49651c087774f1fb9d8acff85fa2ebfD.png\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S2834238166974916a253382e935b1972B.png\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S91837e02dfa4476b8b5653efbc282d05C.png\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Sa98a1b19d0bc4fe58000ca67973dabf2L.png\" slate-data-type=\"image\"\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"detailmodule_dynamic\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"detailmodule_dynamic\"\u003e\u003ckse:widget data-widget-type=\"customText\" id=\"1005000024963203\" 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