{"version":"1.0","provider_name":"The Audio People","provider_url":"https:\/\/theaudiopeople.com.vn\/vi","author_name":"admin","author_url":"https:\/\/theaudiopeople.com.vn\/vi\/author\/admin\/","title":"Cayin HA-3A - The Audio People","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"4SKjrR0xb2\"><a href=\"https:\/\/theaudiopeople.com.vn\/vi\/product\/cayin-ha-3a\/\">Cayin HA-3A<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/theaudiopeople.com.vn\/vi\/product\/cayin-ha-3a\/embed\/#?secret=4SKjrR0xb2\" width=\"600\" height=\"338\" title=\"&#8220;Cayin HA-3A&#8221; &#8212; The Audio People\" data-secret=\"4SKjrR0xb2\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n\/\/# sourceURL=https:\/\/theaudiopeople.com.vn\/wp-includes\/js\/wp-embed.min.js\n<\/script>","thumbnail_url":"https:\/\/theaudiopeople.com.vn\/wp-content\/uploads\/2025\/10\/HA3A_01.jpg","thumbnail_width":1500,"thumbnail_height":1500,"description":"If HA-6A\u00a0and\u00a0HA-300 MKII\u00a0were amps you would argue for, HA-3A is the one that&#8217;s\u00a0impossible to argue against. Cayin Audio managed to wrap a single-ended Class A 6V6 tube amplifier into a compact A4 sized package, for desktop headphone versatility. Weighing in at just over 10KG, not one gram is wasted with Cayin packing their famed power and output transformer iron into even the smallest\u00a0member of the pack. It immediately leapt onto Headfonia&#8216;s Recommended Buys list for a reason. HA-3A is\u00a0Headphone Guru&#8216;s &#8220;slice of heaven&#8221;, bringing the benefits of transformers designed and built in-house to meet the demands of modern headphones \u2013 both planar-magnetic and dynamic, high or low impedance.\u00a0[See Product Desc. For More] Flexibility\u00a0might be the first topic discussed with the lightweight and compact HA-3A, but compromise in quality was never an option. Cayin&#8217;s point-to-point wiring is de facto again for signal integrity, and the EI core output transformers utilise their shape to take the transparency of 6V6 power tubes out beyond the human hearing range. These power tubes popularised by their use in Gibson and Fender electric guitar amplifiers are run in single-ended Class A. Linearity is a given\u00a0through the holy grail of bias operation, even at this price point, while tube operating voltages allow for large operating points. Distortion is below even the threshold of HA-3A&#8217;s bigger HA-6A and HA-300 MKII brothers \u2013 clipping\u00a0theoretically\u00a0only occurring beyond the former&#8217;s maximum power envelope.\u00a0 And any distortion will be of the even-order\u00a0variety expected of\u00a0tube amplifiers, for a smooth, warm and holistic sound. Tube rectification rounds\u00a0out HA-3A&#8217;s fully-regulated linear power supply built around Cayin&#8217;s in-house toroidal power transformer. In there is Cayin&#8217;s promise \u2013 for low cost of entry, weight and size, the flagship trappings of HA-3A are impossible to deny. A\u00a0fully-regulated linear power supply, Class A bias, high tube operating voltages, low capacitances, even-order harmonics and EI core output transformers ensure Cayin&#8217;s baby of the bunch gets mentioned over similarly-priced solid-state competitors, and even higher-priced tube alternatives. For those shopping with limitations to size and weight, HA-3A\u00a0absolutely sounds like an offering without limitations. Particularly if Audio-Technica, Sennheiser and ZMF Headphones are your typical port of call.\u00a0 As for those without space or weight constraints, make the\u00a0HA-6A\u00a0and\u00a0HA-300 MKII\u00a0your first candidates, or view Cayin&#8217;s other offerings here and our other desktop amplifiers here."}