{"product_id":"855001001","title":"Cayin HA-300 MK2 - Type UK","description":"\n\u003ccenter\u003e\u003cp\u003e\u003ca\u003eClick here to view the Official Cayin HA-300 MK2 Brochure.\u003c\/a\u003e\u003c\/p\u003e\u003c\/center\u003e\n\u003cp\u003eRevised 2023 Model.\u003c\/p\u003e\n\u003cp\u003ePlease note that all 'Type UK' models are specifically manufactured for Audio Emotion with 240v transformers (and not the EU standard 220\/230 models).\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eSingle-ended tube headphone amplifier with Gold Lion 300B tubes\u003c\/b\u003e\u003cbr\u003eThe Cayin HA-300MK2 is the successor to the HA-300 and was specially developed as a two-part tube amplifier for high-quality headphones. It can supply these not only via jack sockets and symmetrical 4-pin XLR connections, but now also via a 4.4 mm symmetrical socket. Its external power supply has a complex circuit with four rectifier tubes and ensures a constant, equal voltage for all amplification stages. This power supply concept delivers absolutely clean power with minimal interference for the signal amplification of the main amplifier. LS : 2 x 8 watts, KH: 2 x 5 watts\u003cbr\u003e\u003cbr\u003eAs one of the largest tube amplifier manufacturers in the world, Cayin designs and builds its own transformers and ensures that even the smallest details are taken into account. The tubes: 2 x 6SN7GTB, 2 x Gold Lion 300B, 4 x 22DE4.\u003c\/p\u003e\n\u003cp\u003eThe new Cayin flagship vacuum tube headphone amplifier is the HA-300MK2 and is a Class A Transformer coupled headphone and speaker Single-ended Triode Amplifier (SETA).\u003c\/p\u003e\n\u003cp\u003eIt uses a matched pair 300B Direct Heated Triode as output tube and a matched pair of 6SN7 as driver tube. The tube amplification circuit is operated in Single-ended, thats why it is referred to as a SETA, and then feeds to a pair of output transformers for single-ended headphone, XLR-4 and 4.4mm balanced headphone output and one set of speaker terminals.\u003c\/p\u003e\n\u003cp\u003e\u003cu\u003eThe irresistible 300B Direct Heated Triode\u003c\/u\u003e\u003cbr\u003eA lot of tube enthusiasts consider the Directed Heated Triode (DHT) as the holy grail of vacuum tube for audio application. DHT refers to Triode tubes that use the cathode as the filament and will heat up the cathode directly during operation.\u003c\/p\u003e\n\u003cp\u003eThese can be considered as the minimal approach to amplification and have a huge following, especially among Japanese and Chinese audiophile communities. There is a long list of vacuum tubes that belong to this family, but for modern audio application, the more commonly used DHT are 45, 2A3, 300B, 845 and 211, and 300B is probably the most well-known and sought after DHT in audiophile community.\u003c\/p\u003e\n\u003cp\u003eThe 300B offers an attractive tonal characteristic that is very close to the dream of audiophiles. It has a prominent full-body midrange, harmonically rich with unforced details that bring out the best of acoustic instrument, and the holographic presence that how the singer (or the band) appeared to be directly there in front of you.\u003c\/p\u003e\n\u003cp\u003eTechnically, the 300B offers very high linearity during amplification. This probably accounts for the natural presentation and excellent low-level details that re-created the presence that bring us closer to our music.\u003c\/p\u003e\n\u003cp\u003eCayin adopts a matched pair of Gold Lion Genelex PX300B as output tube for HA- 300MK2. This is a low-noise audio triode that offers very decent frequency extension with a natural, sensible and realistic sound signature.\u003c\/p\u003e\n\u003cp\u003eThis tube is considered to be an excellent upgrade tube by many 300B users and is often referred to as the best\u003cbr\u003eof the 300B tubes.\u003c\/p\u003e\n\u003cp\u003e\u003cu\u003eSETA, a Purists One-way Ticket \u003c\/u\u003e\u003c\/p\u003e\n\u003cp\u003eSingle-ended Triode Amplifier (SETA) is a vacuum tube-based design that uses a single-triode tube per channel to produce output without splitting the musical signal's plus\/minus parts in each channel.\u003c\/p\u003e\n\u003cp\u003eIn contrast, a push\/pull amplifier, which uses a pair (or more) of tubes, splits the plus\/minus of the music signal, then it has to put them back together to form the complete musical wave in each channel. ......The perceived high sonic quality is mainly attributed to the simplicity and minimalist approach of the circuits involved, as well as the triode vacuum tubes that are typically used.\u003c\/p\u003e\n\u003cp\u003eOne SET aficionado describes it as a Zen simplicity to reproduce the complexity of music.\u003c\/p\u003e\n\u003cp\u003e\u003cu\u003eLess is more\u003c\/u\u003e\u003cbr\u003eCayin recognized the beauty of SETA and has devoted a lot of resource to develop dozens of SETAs in our history. HA-300 and HA-300MK2 employs the same 2-stage single-ended amplification with 6SN7 as the driver tube.\u003c\/p\u003e\n\u003cp\u003eIt will boost the input signal to the appropriate level so that the 300B output tube will perform its second stage amplification at a very linear condition. In simple terms, driver tube amplifies signal voltage while output tubes amplify current.\u003c\/p\u003e\n\u003cp\u003eCayin always use 6SN7 as driver tube when we use 300B as output tube. Chris Marten called this combination legendary in audiophile circles in his HA-300 review (HiFi+ July 2018, issue 161, page 69-72).\u003c\/p\u003e\n\u003cp\u003eFor the HA 300MK2 implementation, Cayin uses a matched pair of Tung-Sol 6SN7GTB as driver tube for almost the same reason as Genalex Gold Lion PX300B. This is a super linear, low noise high performance, highly reliable and natural sounding driver tube for SET amplification.\u003c\/p\u003e\n\u003cp\u003e\u003cu\u003eTransformer Coupled Balanced Driven\u003c\/u\u003e\u003cbr\u003eHA-300MK2 is a transformer coupled SETA. The output from the 300B output tube will drive a pair of proprietary output transformers which support both headphone and speaker outputs.\u003c\/p\u003e\n\u003cp\u003eIf the 300B triode tubes are the spirit of the HA-300MK2, the output transformers are the flesh and blood of the amplifier. Cayin believes in this design. While there are different types of vacuum tube amplifiers in the market, we stick with transformer coupled whenever possible, and that means literally all our desktop tube amplifiers are transformer coupled.\u003c\/p\u003e\n\u003cp\u003eWe understand the preference towards balanced headphones in our Personal Audio hobby. For transformer coupled design, it is fairly straight forward to support both single-ended and balanced driven in the same circuit because our amplifiers are transformer coupled. Since balanced headphone amplification is feeding opposing polarity signals to the left and right ear-cup of your headphone (in regardless of whether there is a dynamic driver or a planar inside).\u003c\/p\u003e\n\u003cp\u003eWe can achieve this through a specific method to winding the transformer so that the positive polarity (aka hot) and negative polarity (aka cold) are driven in opposite directions, hence deliver a fully balanced output from a single-ended tube amplification circuit. In other word, both single-ended and balanced headphone output are output from the transformers, we don't take the single-end output and then convert it into balanced through wiring.\u003c\/p\u003e\n\u003cp\u003eHA-300MK2 offers two balanced headphone outputs: 4.4mm and XLR4 and we have optimize these two headphone outputs separately. The XLR4 output is a full-fetched output from output transformer while the 4.4mm winding is a level-matched, lower noise, lower power output with the same audio performance, making it more suitable for portable headphones.\u003c\/p\u003e\n\u003cp\u003e\u003cu\u003eImpedance Matched Headphone Outputs\u003c\/u\u003e\u003cbr\u003eOne of the very useful feature of Cayin vacuum tube amplifiers is the impedance matched headphone output. HA 300 provides three headphone impedance settings, and the amplifier will optimized its output to handle the headphone loading according to the specified headphone impedance. Each impedance matched output is an independent secondary winding from the output transformers. The impedance settings are:\u003c\/p\u003e\n\u003cp\u003e\u003cu\u003eRecommended for Target Impedance (XLR4 and 4.4mm) \u003c\/u\u003e\u003c\/p\u003e\n\u003cp\u003eLow (L): 8~64 32\u003cbr\u003eMedium (M): 65-250 64\u003cbr\u003eHigh (H) : 251~600 300\u003c\/p\u003e\n\u003cp\u003eMatching headphone impedance should produce a natural sound with well-defined bass reproduction. This is our recommended starting point but not necessarily your preferred sound signature, so you can start with the nearest setting to your headphone and then experiment with other settings.\u003c\/p\u003e\n\u003cp\u003e\u003cu\u003eBack to Transformer\u003c\/u\u003e\u003cbr\u003eTo summarize, the output transformers of HA-300B are extremely complicated because we need a pair of Multiple Winding Output Transformers that takes cares of three headphone outputs (6.35mm, 4.4mm, XLR4) a primary winding, and supports three impedance matched headphone outputs, plus one set of speaker output, at secondary winding.\u003c\/p\u003e\n\u003cp\u003eTransformer plays a vital role in transformer coupled vacuum tube amplifier. The design and implementation of transformers become an important part of our product tuning. The choice of transformer core, specification of copper wire in different parts of winding, and the winding instruction will affect the performance and sound signature of our product. This is a critical core competence that will maximize our product development capability, extend our product life cycle and enhance our operate efficiency.\u003c\/p\u003e\n\u003cp\u003eGiven Cayins scale of operation and devotion to build high quality tube amplifiers for our customers, Cayin bite the bullet and incorporated a small transformer plant in our facilities. We design and wind all the power supply and output transformers of our tube amplifiers in-house. This will allow the R\u0026amp;D department to have total freedom in specifying the winding instructions for our products, and we have total control on the material and craftsmanship on the transformer of our tube amplifiers.\u003c\/p\u003e\n\u003cp\u003e\u003cu\u003eTube Regulated Outboard Power Supply\u003c\/u\u003e\u003cbr\u003eThe power supply for HA-300MK2 uses a custom-build toroidal power transformer. This is a special circuit to supply different gain stages, and we have used 4 pieces of NOS RCA 22DE4 rectifier tubes to convert incoming power source to DC current for cleanest power with minimum interference for the amplification circuit. These are one of the best version of 22DE4 tube and when used as rectifier tube in HA- 300MK2, they can easily last heavy usage of 5 to 10 years. The four 22DE4 are supposed to work independently from each other. When we replace a 22DE4 rectifier tube, we can do that per piece without any matching process.\u003c\/p\u003e\n\u003cp\u003e\u003cu\u003eDesign and Features\u003c\/u\u003e\u003cbr\u003eSingle-ended Direct-Heated Triode design, brings out the charm of the tubes with natural and realistic music playback.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDriver Tube: matched pair of Tung-Sol 6SN7GTB\u003c\/li\u003e\n\u003cli\u003eOutput Tube: matched pair of Genalex PX300B\u003c\/li\u003e\n\u003cli\u003eRectifier Tube: 4 pieces of NOS RCA 22DE4\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSupport Balanced (XLR) and single-ended (RCA) input, balanced input will transform to single-ended through a pair of input transformers.\u003c\/p\u003e\n\u003cp\u003eThe output from the 300B will feed into a pair of custom design in-house manufactured high quality EI output transformer for speaker, single-ended (6.35mm) or balanced (4-pins XLR and 4.4mm) headphone output.\u003c\/p\u003e\n\u003cp\u003eChoice of three impedance matched headphone outputs (L, M and H) to make sure HA-300MK2 can handle vast variety of headphones satisfactory.\u003c\/p\u003e\n\u003cp\u003ePowerful headphone output, handle demanding headphones with ample headroom.\u003c\/p\u003e\n\u003cp\u003eCustom make silica gel shock absorber as anti-shock buffer between critical tube components, chassis mainframe and tube socket, remove microphonic effect of the 300B DHT effectively and provide quiet and realistic playback from sensitive headphones.\u003c\/p\u003e\n\u003cp\u003eMinimize interference by reinforcing shielding of transformers, effective circuit layout and optimized circuit design\u003cbr\u003e60sec startup delay circuit to enhance circuit protection and minimize pop noise when startup.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOne set of speaker terminal as alternative output, can be used as an integrated speaker amplifier with 8 watt per channel Class A output.\u003c\/li\u003e\n\u003cli\u003eOutboard power supply provides pure and steady power for the amplification circuit with minimum interference.\u003c\/li\u003e\n\u003cli\u003eCustom design in-house manufactured high quality toroidal power transformer and EI output transformers.\u003c\/li\u003e\n\u003cli\u003eHigh voltage power rectification with set of four NOS RCA 22DE4 tubes.\u003c\/li\u003e\n\u003cli\u003eTwo-boxes design with multi-stage tube regulated power supply reduce interference to signal amplification effectively through independently regulated power supply for voltage amplification circuit. Optimize power provision to all circuit and enhance audio performance significantly.\u003c\/li\u003e\n\u003cli\u003ePoint-to-point Wielding to ensure shortest signal path and enhance the transparency and refinement of audio performance High-Precision JRC MUSES72320V electronic volume controller with 41-steps ALPS balanced potentiometer to provide low noise and accurate volume control.\u003c\/li\u003e\n\u003cli\u003ePremium grade MultiCap coupling capacitor improves resolving capability and soundstage.\u003c\/li\u003e\n\u003cli\u003eHigh quality shielded silver-plated cable for internal wiring, minimize interference during internal transmission.\u003c\/li\u003e\n\u003cli\u003eBeautifully design and crafted VU meter.\u003c\/li\u003e\n\u003cli\u003eLock On quick-release aviation grade copper connectors with silver plated Teflon umbilical cable for outboard power supply connection.\u003c\/li\u003e\n\u003cli\u003eDetachable vacuum tube shielding cage, easy to detach and install.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eManufacturer Site\u003c\/h3\u003e\n\u003cul\u003e\u003cli\u003e\u003ca\u003eCayin\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e\n","brand":"Cayin","offers":[{"title":"Satin Black","offer_id":52740318560522,"sku":"CAYIN-7373","price":3799.0,"currency_code":"GBP","in_stock":true},{"title":"Aluminium Silver","offer_id":52740318593290,"sku":"CAYIN-7374","price":3799.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0917\/3283\/6618\/files\/cayin-ha-300-mk2-type-uk-33345-p.png?v=1773934903","url":"https:\/\/audioemotion.co.uk\/products\/855001001","provider":"Audio Emotion Limited","version":"1.0","type":"link"}