{"product_id":"singxer-sa2-class-a-fully-balanced-discrete-headphone-amplifier-preamplifier","title":"SINGXER SA2 Class A Fully Balanced Discrete Headphone Amplifier \u0026 Preamplifier","description":"\u003cdiv data-template-name=\"productDescription\" data-feature-name=\"productDescription\" class=\"a-row feature\"\u003e\n\u003cdiv class=\"a-divider a-divider-section\"\u003e\n\u003cdiv class=\"a-divider-inner\"\u003e \u003c\/div\u003e\n\u003ch2 class=\"default\"\u003eProduct Description\u003c\/h2\u003e\n\u003cdiv id=\"productDescription\" class=\"a-section a-spacing-small\"\u003e\n\u003c!-- show up to 2 reviews by default --\u003e\n\u003cp\u003e\u003cspan\u003eSPECIFICATIONS\u003cbr\u003eSA-2 Class A Mode:\u003cbr\u003eBalanced 16-ohm load: Below 400mW;\u003cbr\u003eBalanced 32-ohm load: Below 800mW;\u003cbr\u003eBalanced 64-ohm load: Below 1600mW;\u003cbr\u003eBalanced loads above 64 ohms: Nearly all power is Class A\u003cbr\u003e\u003cbr\u003eSA-2 Gain Settings:\u003cbr\u003e1. Single-ended input to single-ended output: Low gain = 0dB, High gain = 12.8dB;\u003cbr\u003e2. Single-ended input to balanced output: Low gain = 6dB, High gain = 18.8dB;\u003cbr\u003e3. Balanced input to single-ended output: Low gain = -6dB, High gain = 6.8dB;\u003cbr\u003e4. Balanced input to balanced output: Low gain is 0dB, high gain is 12.8dB\u003cbr\u003e\u003cbr\u003eInput impedance:\u003cbr\u003eSingle-ended: 33K ohms\u003cbr\u003eBalanced: 20K ohms\u003cbr\u003e\u003cbr\u003eInput sensitivity:\u003cbr\u003eBalanced input to balanced output:\u003cbr\u003eHigh gain: 4.2V RMS\u003cbr\u003eLow gain: 18V RMS\u003cbr\u003eSingle-ended input to balanced output:\u003cbr\u003eLow gain: 9V RMS\u003cbr\u003eSingle-ended input balanced output: High gain: 2.1V RMS\u003cbr\u003e\u003cbr\u003eHeadphone Output Impedance:\u003cbr\u003eSwitch LOW-Z is low-impedance mode, HI-Z is high-impedance mode;\u003cbr\u003eLow-impedance output impedance: 0.15 ohms (balanced) and 1.1 ohms (single-ended);\u003cbr\u003eHigh-impedance output impedance: 10 ohms (balanced) and 11 ohms (single-ended);\u003cbr\u003ePreamp Output: Single-ended impedance 75 ohms, balanced impedance 150 ohms\u003cbr\u003e\u003cbr\u003eDimensions of the chassis: 234mm × 170mm × 46mm, excluding the height of the chassis feet and protruding connectors at the rear.\u003cbr\u003eUnit weight: approximately 1.8kg\u003cbr\u003eCarton dimensions: 350mm × 230mm × 110mm\u003cbr\u003eShipping package weight: approximately 2.3kg\u003cbr\u003e\u003cbr\u003eUpgrade specs:\u003cbr\u003e1. Output power increased from SA-1's 5.5 watts into 32 ohms to 10 watts into 32 ohms, with a maximum of 15 watts into 20 ohms; supports headphones down to 8 ohms minimum impedance.\u003cbr\u003e2. Circuit optimization maintains ultra-low distortion even at high power output.\u003cbr\u003e3. Enhanced thermal management with a copper block + aluminum alloy heatsink design;\u003cbr\u003e4. Reduced impedance at the balanced headphone output, boosting current drive capability for greater pushing power;\u003cbr\u003e5. Optimized PCB routing, adjusted DC bias circuitry, added DC servo design, and incorporated a GND\/LIFT mode switch;\u003cbr\u003eSupports global AC voltages 100V-240V without switching; identical hardware for China, Europe, US, and UK versions, differing only in included power cords.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i3\/156213177\/O1CN01EapqIl1ZL7OdevbFq_!!156213177.jpg\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i2\/156213177\/O1CN014LP8MX1ZL7OdEvpix_!!156213177.jpg\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i4\/156213177\/O1CN01QLZQnu1ZL7Oe7HTNm_!!156213177.jpg\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i1\/156213177\/O1CN01S4zp0a1ZL7OezV2Yn_!!156213177.jpg\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eUltra-low distortion; the image below shows the performance of the APX555 test sample:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i2\/156213177\/O1CN01TgqtqR1ZL7OeQ2Qzv_!!156213177.jpg\"\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i1\/156213177\/O1CN01K0MRpl1ZL7OdJeL7D_!!156213177.jpg\"\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i1\/156213177\/O1CN01YLmfn91ZL7OdhQohb_!!156213177.jpg\"\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i1\/156213177\/O1CN01QfA0Nx1ZL7OfNByS8_!!156213177.jpg\"\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i1\/156213177\/O1CN01iXIBVG1ZL7Of09JtG_!!156213177.jpg\"\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i1\/156213177\/O1CN01iXIBVG1ZL7Of09JtG_!!156213177.jpg\"\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i3\/156213177\/O1CN01N4c0HC1ZL7OdFYEb4_!!156213177.jpg\"\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i3\/156213177\/O1CN01Q12E0c1ZL7Odm93Hc_!!156213177.png\"\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i1\/156213177\/O1CN01Ib6bIX1ZL7OeeXW9J_!!156213177.jpg\"\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i3\/156213177\/O1CN01wfed7C1ZL7OdiSKBD_!!156213177.jpg\"\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i3\/156213177\/O1CN01iUSNlB1ZL7OdkEYuz_!!156213177.jpg\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe following tests are performed on the balanced output of the headphone amplifier, with a load of 32 ohms:\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i4\/156213177\/O1CN01c4Akx81ZL7OetovSA_!!156213177.jpg\"\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i1\/156213177\/O1CN01JhM80i1ZL7Oets4te_!!156213177.jpg\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- Used to set table width because AUI is overriding the width attribute of the tables coming in description --\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cstyle type=\"text\/css\"\u003e#productDescription h3 {\n            margin: 0.75em 0px 0.375em -1px;\n        }\n\u003c\/style\u003e","brand":"Singxer","offers":[{"title":"US 110V","offer_id":42788079370317,"sku":null,"price":629.0,"currency_code":"USD","in_stock":true},{"title":"EU 220V","offer_id":42788079403085,"sku":null,"price":629.0,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":42788079435853,"sku":null,"price":629.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0039\/4087\/6358\/files\/81n1USCW-uL._AC_SL1500.jpg?v=1773715058","url":"https:\/\/www.hificollege.net\/products\/singxer-sa2-class-a-fully-balanced-discrete-headphone-amplifier-preamplifier","provider":"HIFI College","version":"1.0","type":"link"}