{"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-2A - The Audio People","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"46OfTrNsUp\"><a href=\"https:\/\/theaudiopeople.com.vn\/vi\/product\/cayin-ha-2a\/\">Cayin HA-2A<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/theaudiopeople.com.vn\/vi\/product\/cayin-ha-2a\/embed\/#?secret=46OfTrNsUp\" width=\"600\" height=\"338\" title=\"&#8220;Cayin HA-2A&#8221; &#8212; The Audio People\" data-secret=\"46OfTrNsUp\" 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\/HA-2ABlack_01.jpg","thumbnail_width":1500,"thumbnail_height":1500,"description":"If\u00a0HA-6A\u00a0and\u00a0HA-300 MKII\u00a0were amps you would argue for, HA-2A is the one that&#8217;s\u00a0impossible to argue against. Building on HA-3A&#8216;s success,\u00a0Cayin Audio\u00a0again wrapped a single-ended Class A NOS tube amplifier into a compact A4 size\u00a0for the desktop &#8230; but reduced size, weight and cost at the same time! HA-2A does that, but it&#8217;s no OTL pussycat despite its reduced size and weight. More than anything, Cayin&#8217;s baby of the bunch brings the benefits of output transformers designed and built in-house to meet the power requirement demands of modern headphones \u2013 both planar-magnetic and dynamic, high or low impedance. [See Product Desc. For More] Flexibility might be the first topic discussed with the lightweight and compact HA-2A, but compromise in quality was never an option. Headfonics say &#8220;HA-2A is a very endearing and well-equipped compact tube amplifier for space-conscious audiophiles&#8221;. Cayin&#8217;s point-to-point wiring is de facto again for signal integrity, and HA-2A&#8217;s EI core output transformers surpass even HA-3A&#8217;s, extending signal out to 50Khz. That frequency extension up high will already yield great improvements in\u00a0HA-2A&#8217;s mid-range and treble compared to HA-3A, with Cayin&#8217;s latest preserving phase response in the human hearing range that much better for superior sound-staging, dynamics and imaging precision. Mixing fidelity that was once the domain of Output Transformer-Less (OTL) amplifiers in the same desktop footprint as iDAP-8 and iDAC-8, with actual power \u2013 all while reducing in price \u2013 is a true feat of Cayin.\u00a0 The sense of value doesn&#8217;t stop there, with premium New-Old Stock (NOS) valves \u2013 US-production Amperex ECF-82\/6U8 driver and 17BF11 power tubes from the 1950s \u2013 included. Operating the ECF-82\/6U8 only as a triode unlocks load line and soft-clipping functions at the drawing board. Their presence at the voltage gain stage is significant, where the majority of an amplifier&#8217;s final sound signature is defined. HA-2A&#8217;s novel implementation of the composite designs of both these driver and power tube types make for very interesting transfer characteristics and distortion curves. Still, linearity is a given\u00a0through the holy grail of bias operation, even at this price point, while tube voltages allow for large operating points. Measured distortion is below even the threshold of HA-2A&#8217;s bigger HA-6A and HA-300 MKII brothers.\u00a0 And any distortion will be of the even-order\u00a0variety expected of\u00a0single-ended Class A amplifiers, for a smooth, warm and holistic sound. In there is Cayin&#8217;s promise \u2013 for low cost of entry, weight and size, the flagship trappings of HA-2A are impossible to deny. Class A bias, high tube operating voltages, low capacitances, even-order harmonics and premium EI core output transformers ensure HA-2A gets mentioned over similarly-priced solid-state competitors, and even higher-priced tube alternatives. Even its power transformer is a loosely-wound EI core for greater AC line performance over a conventional toroid, avoiding saturation more naturally plus the negative effects of the latter&#8217;s high magnetic flux and coupling between primary and secondary windings. Even for those shopping with limitations to size and weight, HA-2A&#8217;s power supply is fully regulated and absolutely 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."}