{"title":"Thoress | Authorised Dealer INDIA | The Audio Co","description":"\u003cp\u003eShop premium Thoress audio products in India with Free Shipping, Official Warranty, Customer Support and GST Billing. Explore our complete range of Thoress audio equipment.\u003c\/p\u003e","products":[{"product_id":"thoeress-f2a11-integrated-tube-amplifier","title":"Thöress F2a11 Integrated Tube Amplifier","description":"\u003ch2\u003eThe Thöress F2a11 Integrated Amplifier utilizes the famous F2a11 vacuum tube in singleended triode operation mode for an output power of 2x6 watts into a 4, 8 or 16 ohm load. The F2a11 is a power pentode of matchless built quality exclusively manufactured by SIEMENS in the 1950s and early 1960s which has been specifically designed for the most demanding industrial applications. When operated in triode mode this extraordinary tube offers excellent sonics on par with the finest classic filamentary triodes such as 300B, 2A3, AD1 or PX25. A 12SN7GT double-triode is employed in the driver stages. The triode sections of the 12SN7GT tube are equivalent to a 6J5GT single-triode, a highly regarded classic medium-gain octal base triode with fairly low transconductance from the early times of tube  electronics, unarguably one of the most linear amplification devices ever developed in the\u003cbr\u003ehistory of electronic technology.\u003c\/h2\u003e\n\u003cp\u003eThe amplifier can be employed as a stereophonic power amplifier (in combination with a line or full function preamplifier), in which case the volume controls of the amplifier serve as input attenuators to match the gain of the line device to the efficiency of the loudspeaker.\u003c\/p\u003e\n\u003cp\u003eOur All-Tube Integrated entirely relies on minimalist single-ended zero-feedback schematics. Deliberately ignoring the fact that many music lovers persistently believe in the myth that balanced technology (and the associated cable configuration with XLR connectors) is generally superior to single-ended concepts. Readers who want to learn more about our view on balanced techniques and our general design approach and are encouraged to read the article (THÖRESS - Behind the Curtain) available on request.\u003c\/p\u003e\n\u003cp\u003eThe amplifier is built with meticulous hand construction using our proven point-to-point wiring techniques, whereas much care has been taken in arranging each aspect of the internal construction to ensure low noise performance, ease of service and the highest reliability for many years to come. Although reasonably priced, the F2a11 Integrated shares the non-compromise approach with our larger mono amplifier models. It is by no means an entry-level component, but a state-of-the art device which is likely to be sonically superior to any competitive product regardless of price. The sound of our F2a11 amplifier is powerful, warm, clear and natural. Particularly when combined with our highly efficient 2CD12 highly efficient loudspeaker the sonic presentation is of utmost refinement and will easily meet the expectations of even the most critical and experienced music lover.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eINPUTS AND VOLUME CONTROL\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe amplifier comprises 3 line level inputs (2x3 RCA jacks) with equal gain status selectable via rotary dial located on the rear panel. High-grade continuously variable single-potentiometers are employed for separate (manual) volume control of the channels. These parts are made to our specifications by ALPS in Japan to allow for conveniently fine volume adjustment (taper with low angle sensitivity). Each pair of\u003cbr\u003epotentiometer is hand-picked from a larger production batch by careful measurement to ensure equal attenuation characteristics with respect to rotational angle (hence the slots surrounding the volume knobs are reliable scales for balance adjustment). Notably, it is not possible to install remote volume control on the F2a11 Integrated. Music lovers who consider remote volume control as an indispensable feature are encouraged to take a closer look at our EHT Integrated Amplifier!\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTRANSFORMERS\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe F2a11 Integrated Amplifier is equipped with proprietary output transformers (OPT) of ultimate quality made in-house. These parts allow for precise matching of a 4, 8 or 16 ohm loudspeaker load to the power tube by way of jumpers soldered to the secondary terminals. Furthermore, the mains transformer is also produced inhouse to  the highest possible standards. Thus, we can easily built transformers for all kinds of mains voltages, for example for 100Vac (Japan), 120Vac (USA, Canada), 220Vac (South Korea, China, Thailand, Indonesia), 240Vac (UK) or 245 Vac (Australia).\u003c\/p\u003e\n\u003cp\u003eAlthough the mains transformer has been optimized for low leakage and ultra low body noise emission it is mounted to the amplifier chassis via isolation elements in order to eliminate even the slightest interference of residual transformer vibrations with the circuit.\u003c\/p\u003e\n\u003ch5\u003eFeatures\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eAll-Tube Integrated Amplifier with 2x6 watts of output power utilizing the famous Siemens F2a11 Power Pentode in single-ended triode mode and a highly linear 12SN7GT double-triode in the driver stages.\u003c\/li\u003e\n\u003cli\u003eMinimalist zero-feedback schematic.\u003c\/li\u003e\n\u003cli\u003e3 line level inputs (2x3 RCA jacks) selectable via rotary dial on the rear panel.\u003c\/li\u003e\n\u003cli\u003eHigh-grade continuously variable potentiometers for separate (manual) volume control of the channels.\u003c\/li\u003e\n\u003cli\u003eUltimate C-Core output transformers (OPT) produced in-house. Precise 4, 8, and 16 ohm loudspeaker load matching via jumpers soldered to the secondary terminals of the OPT.\u003c\/li\u003e\n\u003cli\u003eHigh-grade electrolytic capacitors (made in Germany) in the power supply.\u003c\/li\u003e\n\u003cli\u003eUltra low noise mains transformer made in-house for 230Vac.\u003c\/li\u003e\n\u003cli\u003eFull hand construction, point-to-point wiring throughout.\u003c\/li\u003e\n\u003cli\u003eNonmagnetic aluminum casework, anodized printing on front and rear panel, powder-coated chassis, and lids.\u003c\/li\u003e\n\u003cli\u003eDimensions: 150x595xH330 mm, 330=20 (case feet) +210+100 (power tube over case), 595=575+20 (binding posts).\u003c\/li\u003e\n\u003cli\u003eWeight 18 Kg.\u003c\/li\u003e\n\u003cli\u003eDimensions of the shipping crate 400x950xH460 mm.\u003c\/li\u003e\n\u003cli\u003eMade in Germany\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cbr\u003e\u003c\/h5\u003e\n\u003ch5\u003eSupport\u003cbr\u003e\n\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"http:\/\/www.thoeress.com\/downloads\/thoeress_f2a11_integrated_description.pdf\" title=\"Datasheet\" aria-label=\"Visit a webpage about Datasheet\" target=\"_blank\"\u003eDatasheet\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"http:\/\/www.thoeress.com\/manuals\/thoeress_f2a11_manual.pdf\" title=\"Manual\" rel=\"noopener\" aria-label=\"Visit a webpage about Manual\" target=\"_blank\"\u003eManual\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Thoress","offers":[{"title":"Default Title","offer_id":42841055232083,"sku":null,"price":1190000.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1867\/3055\/files\/thoeress-f2a11-integrated-tube-amplifier-theaudioco-555.webp?v=1774983333"},{"product_id":"thoeress-eht-integrated-tube-amplifier","title":"Thöress EHT Integrated Hybrid Tube Amplifier","description":"\u003ch2\u003eThe Thöress Hybrid Triode Integrated Amplifier (EHT Integrated) offers 2x20 watts of output power into a 6 ohm load combined with very low output resistance (high damping factor). Such providing excellent drive capability for loudspeakers with medium to low efficiency or with critically low impedance which may present a challenge for our all-tube single-ended triode amplifier models. While offering the same level of ultimate sonic excellence without involving exotic costly power tubes. The amplifier comprises 4 inputs (RCA jacks) with equal gain status selectable via rotary dial. Furthermore, the amplifier features a proprietary remote volume control based on high grade motor-driven dual-potentiometer presented with typical THÖRESS style and attention to detail. The potentiometers are made to our specifications for low angle sensitivity (conveniently fine volume adjustment) by ALPS in Japan. Each individual part is selected from a large production batch for exceptionally good channel balance by careful measurement (0.3dB tolerance). The amplifier is built with meticulous hand construction using our proven point-topoint wiring techniques, whereas much care has been taken in arranging each aspect of the internal construction to ensure low noise performance, ease of service and the highest reliability for many years to come. The EHT Integrated is an ultimate component in every sense and as such a perfect complement to our Parametric Phono Equalizer (Phono Enhancer). Particularly when combined with our underhung voice-coil 1D66 or horn based 2CD12 loudspeaker the sonic presentation of the amplifier is of the utmost refinement and will certainly meet the expectations of even the most critical and experienced music lover.\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eEHT TOPOLOGY \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe amplifier is based on a unique minimalist single-ended zero-feedback vacuum tube MOSFET hybrid topology which we call EHT Topology (E.intakt-H.ybrid-T.riode, Single-Ended Hybrid Triode). Deliberately ignoring the fact that many music lovers persistently believe in the myth that balanced technology (and the associated XLR connectors and cable configuration) is generally superior over single-ended concepts. Readers who want to learn more about our view on balanced techniques and our general design approach are encouraged to read the paper (THÖRESS - Behind the Curtain) available on request. The EHT topology consists of a single-ended triode gain stage (6J5GT,12J5GT or 7A4 vacuum tube) followed by a unity gain MOSFET output stage also operated in singleended (class-A) mode with high idle current. Basic analysis easily shows that... The EHT principle represents the PUREST form of all possible single-ended triode power amplifier configurations!\u003c\/p\u003e\n\u003cp\u003eSpecifically, it can be shown that a higher output power can be more easily obtained with the EHT than with an all-tube amplification principle, without compromising sound quality. Simply, because in the former case the typical vacuum tube impedance matching output arrangement (power tube driven output transformer with high step-down ratio) can be fully omitted. Therefor the driver voltage swing required for a specific power output is up to 10 times (!!!) lower for the EHT configuration compared to an all-tube topology, resulting in a proportional reduction of non-linear distortion. In fact this very crucial insight led us to the design of the EHT Integrated (and the EHT Mono Amplifier). The EHT topology allows to fully exploit and mate the most desirable characteristics of both vacuum tube and solid state devices determined by their very nature. Despite its elegance and extremely high sonic capability, the EHT concept has never been utilized in a serial audio product before, as far as we know. Probably on account of its low power efficiency and because its implementation is rather tricky.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSTABILITY \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe EHT Integrated Amplifier operates with impeccable thermal stability and is fully short-proof at the output without the aid of any kind of (sound degrading) protection circuitry. Moreover, a switch-on delay module (another protective feature often found in commonly constructed solid state or hybrid amplifiers) is also omitted because no disturbing noise or harmful signal is developed at the output when the amplifier is powered on or off.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBASS BOOST FUNCTIONS \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe EHT Integrated Amplifier MKII (launched in October 2022) includes two novel bass boost presets selectable via a 3-position toggle switch (B1 boost style-1, B2 bass boost style-2). When the switch rests in middle position the tonality of the amplifier is neutral (flat frequency response). The bass boost functions are useful for a variety of applications: For equalizing loudspeaker components with slim bass response or limited bass extension. For adjusting the bass response of the system to the acoustical conditions of the listening environment (smal loudspeakers in large rooms!). For restoring tonal imperfections of the listening program (often given by a lack of bass extension). Or simply for switching to a more full-bodied presentation if one is in the mood for listening to music in an enriched and laid back way. Notably, the bass boost functions act in a much more subtle way than common bass boost facilities and do not rely on clumsy and sound degrading conventional tone control circuitry. Both functions are realized by interposing solely one additional capacitor (per channel) to the neutral mode circuit!\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMAINS TRANSFORMER \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe EHT Integrated Amplifier is equipped with a proprietary mains transformer produced in-house to ensure the highest possible quality and reliability. This part features a highly elaborated dual-coil winding on a large tape wound cut core (Ccore) and has been optimized for low body noise emission and low leakage. Nevertheless, the mains transformer is mounted to the chassis via isolation elements in order to eliminate even the slightest interference of residual transformer vibrations with the circuit. Since the mains transformer is produced inhouse we can easily built transformers for all kinds of mains voltages on demand, for example 100Vac (Japan), 220Vac (South-Korea, China, Thailand, Indonesia) or 245Vac (Australia).\u003c\/p\u003e\n\u003ch5\u003eFeatures\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\n Vacuum Tube MOSFET Hybrid Integrated Amplifier with 20 watts of output power per channel (into a 6 ohm load).\u003c\/li\u003e\n\u003cli\u003eDriving capability for critical loudspeaker loads due to very low output impedance (high damping factor).\u003c\/li\u003e\n\u003cli\u003eUltimate sonic excellence on par with no-compromise all-tube single-ended triode amplifiers, yet without involving exotic and costly power tubes.\u003c\/li\u003e\n\u003cli\u003eUnique minimalist zero-feedback EHT schematic: single-ended triode gain stage (6J5GT tube) driving a unity-gain MOSFET output buffer operated in single-ended (class-A) mode with high idle current.\u003c\/li\u003e\n\u003cli\u003eTotal avoidance of protection circuitry.\u003c\/li\u003e\n\u003cli\u003e4 line level inputs (2x4 RCA jacks) with equal gain manually selectable via rotary dial.\u003c\/li\u003e\n\u003cli\u003eRemote volume control via high-grade motor driven dual potentiometer with excellent channel balance and low angle sensitivity (for conveniently fine volume adjustment).\u003c\/li\u003e\n\u003cli\u003eHigh grade electrolytic capacitors made in Germany in the power supply.\u003c\/li\u003e\n\u003cli\u003eLow noise low leakage dual-coil C-Core mains transformer made in-house for 230Vac (115Vac via jumper setting), 100Vac (Japan), 220Vac (South-Korea, China, Thailand, Indonesia) or 245Vac (Australia).\u003c\/li\u003e\n\u003cli\u003eFull hand construction, point-to-point wiring throughout.\u003c\/li\u003e\n\u003cli\u003eNon-magnetic aluminum casework, anodized printing on front and rear panel, powder-coated lids.\u003c\/li\u003e\n\u003cli\u003eDimensions 434x450x184 mm, 184=20 (feet)+134+30 (tubes over case), 450=434+16 (speaker binding posts).\u003c\/li\u003e\n\u003cli\u003eDimensions of the shipping crate: 650 x 650 x 350 mm, weight 18Kg.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eMade in Germany\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cbr\u003e\u003c\/h5\u003e\n\u003ch5\u003eSupport\u003cbr\u003e\n\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"http:\/\/www.thoeress.com\/downloads\/thoeress_eht_integrated_description.pdf\" rel=\"noopener\" target=\"_blank\" title=\"Datasheet\" aria-label=\"Visit a webpage about Datasheet\"\u003eDatasheet\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" title=\"Manual\" href=\"http:\/\/www.thoeress.com\/manuals\/thoeress_eht_integrated_manual.pdf\" target=\"_blank\" aria-label=\"Visit a webpage about Manual\"\u003eManual\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Thoress","offers":[{"title":"Default Title","offer_id":42841159925843,"sku":null,"price":1290000.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1867\/3055\/files\/thoeress-eht-integrated-hybrid-tube-amplifier-theaudioco-548.webp?v=1774983308"}],"url":"https:\/\/theaudio.co\/collections\/thoress.oembed","provider":"The Audio Co.","version":"1.0","type":"link"}