I believe this is due to the relatively lackluster sound associated with the commercial offerings to date. The Amp Camp Amp Build Guide is now more accessible than ever. Einstein said, "Everything should be made as simple as possible, but no simpler." What an amazing little amp! Even in more complex circuits Bipolar transistors do not have the transconductance characteristic I find desirable, and tubes require a coupling transformer, with its attendant degradation. If you need more help, there's hundreds of diyAudio members who consider it their mission to help any ACA builder get their first amplifier build completed. After living with the “Stock” amp for a couple of months and reading some of Nelson Pass’s writing on the subject, I decided to to use the second kit to bi-amp my speakers instead. Do I offer kits, parts; Do I sell directly; Will I repair amplifiers? Typical efficiency is about 20% maximum. Black or silver front panels, and both blue or red LEDs, High quality genuine parts purchased directly from "Tier 1" US distributors such as Mouser and Digikey, Transistors including Linear Systems LSK170 JFETs and IRC MOSFETs, Switches, LEDs, capacitors, resistors, we include everything, The same parts quality that Nelson Pass uses in his own amplifiers, Components purchased either from "Tier 1" distributors or do-it-yourself audio favorites like Parts Express, Keratherm® MOSFET insulators - very efficient and no grease required, M3 board mounting standoffs, w/ stainless steel bolts and washers, Stainless steel mounting bolts and washers for MOSFETs, Gold plated speaker terminals and RCA Jacks, Cover plate for XLR hole (for advanced users, the XLR hole gives the possibility to create monoblocks with 15 watts per channel), From Meanwell, the best known producer of high quality SMPS in the world, The power supply is universal and operates from 86-264VAC and 47-63HZ, It comes from a best-of-breed manufacturer, has less noise, more power and weighs more than twice as much as the previous power supply, This new power supply is also a suitable upgrade for all previous Amp Camp Amps, just plug and play (. The Amp Camp Amp Kit makes a stereo amplifier that sounds great - here's why. Eurorack usually doesn't require a wiring harness (it is usually etched into the top PCB, and you solder the jacks/pots/switches/LEDS directly into the PCB), so making the harness was more mental energy than expected. Most Push-pull Class A designs offer energy efficiency of twice that of most single-ended designs, and they also offer a measure of distortion cancellation. United States, (Click here to be guided through your choices), After a long wait, the new and improved version of the ACA, the, Parts Kit $129 - Power Supply $49 - Chassis $149. The amplifier is called "Super 30W class A" which implies it can gives 30W of power with operation in class A ! YMMV! To assemble this same kit yourself would cost over $440 including parts, hardware, sales tax and shipping. I have it connected to some Klipsch RB51 bookshelf speakers and fed by a DAC connected to my laptop and the system is wonderful in my office and gets louder than I would ever want. Current batch is due to ship on September 7th SOLD OUT. Went together beautifully, instructions were great, sounds wonderful. Fig 3 shows the PC artwork for two channels. The Amp Camp Amp was created by Nelson Pass for a special event called "Amp Camp" in which 20 people built their very first amplifier from start to finish in one afternoon. The gain stage is biased by some form of impedance which sources the bias current to the transistor. The solution that has been employed is to use a core with an air gap, wish' the result that the primary and secondary coils become only loosely coupled, with performance suffering even more. The input characteristic can be adjusted for sources with more voltage and less current by increasing R5, and can be adjusted for sources with more current and less voltage by decreasing R5 in proportion. This ACA Amp replaced the Lepai in my office and it was a tremendous step up in sound quality (I couldn't possibly go back to the Lepai, it made my ears tired after a couple of hours). Forgot to post this a week ago when they arrived, but I managed to secure a couple of the Nelson Pass V-FET kits which I am quite excited about.. Introduction. The amplifier is also quite at home as a midrange or tweeter amp, and is particularly good with horn loaded drivers. If you find that you can't touch the heat sink in operation, I suggest the use of a fan. Introduction: Class-A 2SK1058 MOSFET Amplifier. Fig 8 shows the frequency response. The characteristic of a single-ended gain stage is the most musically natural. Please note: The official V1.8 build guide has not yet been released. ALEPH 4 - Class A Two-Stage Mosfet Amplifier of Pass Labs. In this case the gain device is a FET, although the concept applies equally well for a tube for bipolar transistor. New Class A Amplifier Fast Power Rectifier Kit Schottky Rectifier. So much knowledge…. Linear singleended designs operate only in Class A. ... One pair Ver 2.0 single-ended PASS A3 Class A amplifier kit 30W +30W amp DIY. Kit ampli dans pièces et composants pour amplificateur - Achetez une variété de produits à prix abordables sur eBay. The rhythm rolls through all octaves from the bottom to the top. If you have a particular pair of speakers in mind, ask about them in the ACA discussion thread. The use of transformers as a load for a single-ended circuit is very problematic, since the DC current passing through the transformer tends to saturate the core. Note that the output connections appear to be reversed in polarity. There will be loudspeakers that are not suitable loads for this amplifier, either because they need high damping factor, have an impedance below 8 ohms, or require more than 10 watts. Product Details: Adopting High end thick gold-plated PCB (Base 2 mm,copper foil 75 U ,beyond 50U PCB ) With Original IRF610 FET transistor (Quiescent current 350MA) Zen Variations 5 Low Res — Nelson Pass / 2003 The Zen Amp concept is an exploration of how well you can make a simple audio amplifier perform. More information on the Zen amplifier and its successor, the Son of Zen, is available from The Audio Amateur. Part substitutions are certainly possible. Such a lively, fun, clean sound! ... DIY Amplifier Kits for Single-ended PASS ZEN HIFI Amplifier Board IRF610 MOSFET. The DIYAudio store has top notch customer service. So how does it sound? Here is a Pass diy Zen 4 amplifier for you to mess with. $28.99. There are quite a few loudspeakers with 8-16 ohm impedances and sensitivities in the 90-100 dB range which are quite suitable. See ACA operation modes for more details on monoblock operation. By objective criteria, this is a perfectly valid approach. Single-Ended Class A operation has received increased attention lately, primarily from tube enthusiasts, and recently a number of companies have introduced tube SingleEnded Class A amplifiers. The pattern is for singlesided (of course!) The A18 is an amplifier of a remarkable concept in that it combines class A operation with a minimalist signal path and a complete lack of loop feedback in the pass band. Resistor R8 and potentiometer P1 form a DC feedback loop which operates the gate of Q1 at about 4 volts and places the Drain potential of Q2 at the midway point of the power supply, or about 17 volts. This means we idle the circuit at 100 watts and have a maximum output. Please ensure you are familiar with how our pre-orders work. This amplifier has its roots in decades of award winning amplifier design experience. This amplifier has its roots in decades of award winning amplifier design experience. They are characterized by limited power, high cost, and multiple gain stages. Nelson is famous for his "Zen" approach to design and this amp is no exception - it's a minimalist circuit that delivers purity through simplicity. With the right loudspeaker, simply wonderful. Amp Camp Amp Chassis (PRE-ORDER, SHIPS 25th FEB), Meanwell 24V 5A power supply and power cord, » Store Helpdesk (Non technical, order related assistance) The next batch to be produced will be shipping January 2021, and is available for pre-ordering now. We have to consider what type of gain device is suitable for this application. Product Description. at the gate of Q2 to about 4 volts. ALEPH T - Class A Tube-Mosfet Single-Ended Amplifier. R9 and R2 are there to bleed off DC, but are not particularly essential. The instruction manual is very good. 27kg best quality capacity 6x 6800uf 160v novea in parrallel Low distortion is still an important goal, and it is my observation that deliberate injection of second harmonic into a musical signal does not improve the quality of sound. The only usable device is the power Mosfet, which is a transconductance device like the tube, and has a high input impedance, but operates with enough gain at high enough currents to be driven directly by line-level signal. This design flaw makes for a sonic signature that many have referred to as "Mosfet mist", where a loss of detail is apparent. Was: Previous Price C $39.87. And then there's your time in buying all the parts and working the chassis... * All prices were calculated live on 11 June 2016 using real products and a shipping address of San Francisco, some prices updated May 4th 2018. All you need it one afternoon and you'll have finished and be listening to a beautiful class A stereo amplifier! Class A amplifiers are always operating in their sweet spot, which is why people say they sound "silky smooth". I have chosen International Rectifier parts in this case, and numerous substitutions will meet these requirements on the IR page of the Digikey catalog. For this use, the Zen topology is perfect excellent sound quality, simplicity, linearity and no multi-stage feedback. A similar amplifier should be commercially available from dealers of Pass products around the time you read this. All you need it one afternoon and you'll have finished and be listening to a beautiful class A stereo amplifier! I think I could build it in half the time next time. This unimaginative use of a new gain device results in a sound that is marginally different than the original bipolar circuit, and not much of an improvement. I wanted to build a Zero Component Amplifier … The aca is definitely a keeper, also it dissipates 40watt vs the 160watt of the m2x, so useful for the hot summers. I enjoyed learning how the author(s) structured and present the information. I work slowly, because this is a hobby not a job, and spend way too much time on each design decision. We have now sold out of kits due to ship on the 7th. I'm no good in circuit reading and complex wiring, but I'd manage to make this within one day and the bias adjust is easy! So, another power supply, much more heatsink, and 2 iterations later, I’m thrilled to say that my 4 individual amplifiers, in a cabinet of my own making, are powering a pair of bookshelf speakers in a way that I never dreamed possible from such low power and such small speakers. It has a generic 3 prong IEC 60320/C13 power cord inlet suitable for use with a "kettle cord". Read more in the Amp Camp Amp article hosted on diyAudio. If there is sufficient continued interest in this approach to amplification, perhaps it will form the basis of another article. C $36.68. Highly recommend for anyone love quality sound! I don't offer kits, sell directly, or repair. Nelson is famous for his "Zen" approach to design and this amp is no exception - it's a minimalist circuit that delivers purity through simplicity. It's the "fixie bike" of Class A amplifiers; no gears, no brakes; zen and the art of amplifier maintenance. The first is simplicity. shipping: + AU $15.42 shipping. Figure 1 shows a simple example of a Single-Ended Class A circuit. In fact Nelson's DIY endeavors are called "First Watt" because in his own words "The first watt is the most important watt". Nelson Pass has done a lot of work in this area with his Zen builds, but I wanted to go beyond Zen. Fig 6 shows the harmonic distortion curve from 10 milliwatts to 20 watts at 1 Khz and 8 ohms. In short, this is a low-power class A amplifier based on some complementary Sony V-FET (SIT) transistors that have been out of production more or less since before I was born. I find that myself getting lost in the music a bit to much these days and staying late at the office just to listen on many evenings. A well matched push-pull pair of gain devices will have lower measured distortion due to cancellation, and will concentrate the harmonic content into third harmonic and other "odd" harmonics, reflecting the symmetry between the plus and minus halves of the waveform. Q1 is the gain stage, biased by the constant current source of Q2. Naturally, other people wanted share that same amazing experience of successfully building their first amplifier so diyAudio has created the three essential ingredients you need for that same journey - the parts, the instructions, and the community. Minimalist Amplifier Topology Less is more. After a long wait, the new and improved version of the ACA, the ACA V1.8, is now in stock. A complete kit consists of a parts kit, power supply and the chassis. The Amp Camp is a single ended amplifier which I call more the culmination of most of the Zen series of diy amplifiers with one output transistor only. I published a 20 watt bipolar Single-Ended Class A design in 1977 in Audio Magazine, and it had four gain stages. The parts kit was complete and organized. Simplicity is not the only reason for the use of the single-ended topology. The P3A amplifier has proven extremely popular, and the DoZ (Death of Zen - see Project 36) continues to provide enthusiasts with a simple, reliable and easy to build Class-A amplifier.For some, the DoZ is too simple, and I have had many requests for a PCB for Project 10 - a Class-A amp, not too different from the P3A. This impedance might be a resistor, or it might be a constant current source, or it might be some other load, such as a loudspeaker. Hawk's philosophy is that properly designed simple and few gain stages yield transparency, and that these stages do not need feedback to get distortion below 0.1% or so (but they do need class A, or enriched class AB for that). All top quality. However, the amount of supplied wire is very generous and forgiving, and the instructions clear and straightforward. Commercially available power amplifiers have as many of 7 gain stages in series. used as a 5W mini Power amplifier. The event was held outdoors on a lovely sunny day in California and all attendees walked away with a fully functioning amplifier and a smile on their dials. Is there anybody out there :-) who is afraid of not having enough energy to drive their speakers ? Specification: Can drive 32-600 ohm … » diyAudio Store Forum (All technical assistance) kit diy amplifier class A. État : "Pour pièces détachées/ne fonctionne pas" transformer’2600va, in :220v monphase or two phases. It cost me in the neigborhood of $600-$700. "What is the sound of one transistor clapping?" It had been my plan to use the second ACA kit (and much more heatsink) to create a bridged (approx) 15 watt amp. It so happens that there are, and the best of them is the subject of a patent recently granted to Pass Labs. And the support here at DIYAudio is amazing! Free postage. If the bias element is a resistor, we see a typical efficiency of about 4%. By contrast, Single-Ended Class A amplifiers cannot linearly deliver current beyond their bias point, and they generally must dissipate at idle more than 4. times their rated output. The advantage of a simple circuit is lost if the sound is overlaid with an excess of false coloration. DIY Kit PASS ZEN single-end Class A Headphone amplifier 5w DC 24V Feature: Reference ZEN line pretty sound design advanced single-ended Class A amp, Board with a rectifier filter ELNA10000UF filter capacitor, Military 718 feet of copper resistance. I will go out of my way to do business with them in the future. DIY Amplifier Kits for Single-ended PASS ZEN HIFI Amplifier Board IRF610 MOSFET. it illustrates the extremes of simplicity that can be achieved with Mosfets operated in single-ended Class A and high objective and subjective performance. or Best Offer. Because this element carries the DC bias current, it is unlikely that we would want to use a loudspeaker for this, and typically we would want to attach the loudspeaker in parallel with the bias element, in series with a blocking capacitor. I. The simplest I know of still has 3 stages. It’s been quite a while since my last one of these “past project” posts, because honestly there isn’t a whole lot of stuff left in the “back catalogue” that I find worth showing off . We're excited to announce the latest revision of our most popular and in demand kit of all time, the Amp Camp Amp. Its asymmetry is similar to the compression / rarefaction characteristic of air, where for a given displacement slightly higher pressure is observed on a positive (compression) than on a negative (rarefaction). At the time, he wrote: “I feel that it’s important to support AudioXpress, a magazine with which I have a 35 year history, and which also serves as a mainstay for the DIY community. The PCB was very high quality, well designed and well made. The right pairing will give you great sound full of audiophile buzz-words, and more than adequate volume for everyday listening or to annoy your neighbours (8W with 91db speakers gives 93db at the couch). There are some minor but important wiring changes compared to V1.6. If this is the case, the DoZ amplifier should be just what you are looking for. The build instructions and step by step layout was easy to follow. I use it with 8ohm 88db 3 way speakers, the sound good but miss tight bass, nevertheless the midrange and highs are fantastic and non-fatiguing. Qnap HS-251+ NAS (powered by an HD-Plex 100w LPS) > Cirrus7 Nimbini v2.5 Media Edition i7-8559U/32/512 running Roon ROCK (powered by a ZeroZone 19v/5A LPS) > Lumin U1 Mini (powered by an UpTone Audio JS-2 LPS) > UpTone Audio ISO Regen (powered by an Uptone Audio UltraCap LPS-1.2) > Metrum Acoustics Adagio NOS digital preamplifier + First Watt SIT 3 power amplifier (or Don Garber Fi … ALEPH X - Class A Balanced Two-Stage Mosfet Amplifier. Obviously an amplifier with a single gain stage will be about as simple as we can topologically create, and we ask the question, "How much performance can we get out of a single gain device? Although marginally more complex than the Zen, it will provide … Single-ended amplification is distinct from push-pull designs in that there is only one gain device for each gain stage, and it carries the full signal alone. The power transformer should source about 25 volts AC at 6 amps or so for each channel. From the Italian chassis artisans at Hi-Fi 2000, Custom design for the ACA / ACA parts kit, Ships direct to you from Italy with FedEx International. After years with music as a sideline affair, I’ve finally re-discovered my passion! Currently the left channel is burnt out, the right channel is fine. It is preferred for purely aesthetic reasons, but also because fewer elements color the sound less, and lose less information. Inevitably after publishing a project such as this, I receive a large number of inquiries as to how to improve the design How to make it bigger, smaller, better; Use better wire, better capacitors, better connectors. This pair of F-5 Clone circuit boards use the same circuit as the Nelson Pass / Firstwatt F-5 model. My biggest learning issue was bending the resistors 1/4 inch out from their ends; my habit from Eurorack is to bend right where the wire leaves the ceramic. This means that the amplifier must be driven by an active source capable of delivering 3.5 volts at 700 microamps. Mosfets have not been adequately appreciated for their characteristics in high end audio. ALEPH 5 - Class A Two-Stage Mosfet Amplifier of Pass Labs. ... DIY Kit PASS ZEN single-end Class A Headphone amplifier 5w DC 24V. Many complex topologies have been justified by high quality of measured performance. Just solder a few more wires to turn it into a single-ended or fully balanced monoblock with twice the power of the standard ACA! All the elements here are easily scaleable, and you can either find bigger Mosfets or run the existing ones closer to their limits. Z1 is essential to insure that an input transient cannot exceed the 20 V gate rating of the Mosfet. Fig 7 shows the distortion at 2 watts across the audio band. "What is the sound of one transistor clapping?" Electronics Projects, Class A Amplifier Circuit PASS ZEN V5 " audio amplifier circuits, transistor amplifier, " Date 2019/08/03. Note that the transformer T1, the fuse F1 and the diode bridges B1 are not on the PC board. In addition to the improvement in efficiency, the constant current sources removes power supply noise from the bias and provides an absolutely constant load for the power supply. An amplifier should be simple, but it also must be linear. It also surpasses my Yamaha receiver in sound quality. I find this really satisfying, like crossing items off your to=do list, and a key to any successful build is parts management. Achetez en toute confiance et sécurité sur eBay! Because the topology reverses polarity, the loudspeaker plus terminals should be attached to ground and the minus terminals are attached to the active output of the amplifier. My Zen has a mere of 20 VA. Double the power per channel with monoblocks. The input impedance is 4.75 Kohms, and the gain is about 8.5 dB. By way of improving the amplifier, you are free to use any better part you like. of 4 watts. In addition, there are ways in which a Single-Ended Class A amplifier can be operated as a push-pull device beyond its bias point, the assumption being that push-pull performance is preferable to clipping. And you wouldn't get the tapped holes or front and rear panels drilled. The simplicity of the amplifier allows a great tolerance to modification. While the actual DC draw is exactly 2 amps per channel, the power factor created by charging the power supply. 1pc Diy Kit for Pass Zen Single-end Class A Headphone Amplifier Amp 5w Dual 0-AC24V. Finished 1000W mono Hifi Class D Audio power amplifier … Pass Labs has received one patent and has an application for another reflecting new developments in this area. The harmonic distortion of such a medium is second harmonic, the least offensive variety. Free advice is sparingly dispensed. For this use, the Zen topology is perfect excellent sound quality, simplicity, linearity and no multi-stage feedback. I have constructed larger versions of this circuit using industrial Mosfet packages which are rated at 600 watts apiece, and they work fine. But this is not rocket science; our objective is to make listeners enjoy sound. also can power desktop speakers, the output power about 3W+3W （6-8ohm). The output impedance of the amplifier is approximately 1 ohm, with a damping factor of about 8. There are two most essential principles to audio amplifier design. Shipping time: Default send by airmail,about 14-20 business days can arrive most of europe countries, Russia, Brazil,Africa.Ukraine and some other remote countries will need some more days. The amplitude is about .25 dB down at 20 Hz and about .5 dB down at 20 Khz. Nelson called it hearing one transistor clapping. small steps with lots of detail. Coming from the Heathkit, Dynaco and Hafler kits generation, building this kit was an easy and fun project. The input signal is applied at the gate, and the transistor provides current and voltage gain which appears at the drain. Actually the choice is simple: Bipolar devices have too low an input impedance to be useable, and tubes have too little gain to be used in a single stage power amplifier. The second is linearity. The second is linearity. If the power supply fuse does not blow, you will be looking for about .66 volts across R1, no DC voltage at the output, and about 17 volts at the drains (center pins) of the Mosfets. Some measure of distortion in an amplifier is unavoidable and forgivable if it is of a less offensive type, but still it is important that the measured distortion performance be reasonably low. Use our ACA options wizard to help you pick the right options for you. It is a single stage class A MOSFET design with the right gain and a low output impedance. The board connections labels L POWER and R POWER attach to the diode bridge + and -. As current passes through Q2, it develops a voltage drop across R1, and when this voltage drop reaches about .66 volts (2 amps through Q2/R1), it turns on the junction of Q3, and Q3 then limits the voltage appearing. With an input signal and an 8 ohm load, adjust P1 for symmetric clipping. For higher … To receive latest Pass DIY news and information, please register below. The sink for each channel must be capable of dissipating 70 watts continuously at a temperature increase of about 25 degrees Centigrade. 1pcs Pass Zen stereo preamplifier PCB Size: 152 * 101MM Thickness: 1.5mm FR4 Copper Thickness: 35UM. They sound even better bi-amped with an active crossover. I can’t thank you all enough for helping me experience music again this way! Simplicity is a common element of the best and most subtle designs. These changes are shown clearly on the V1.8 build guide temporary page. Air itself is observed to be a single-ended medium, where the pressure can become very high, but never go below 0. This Amp Camp Amp is a very clean sounding amp, you will not be disappointed. I ended up with (to my own surprise) a set of B&W CM5 S2’s and wow! We've just launched "diyAudio Guides" (beta), a brand new place to find and share knowledge about audio DIY. This is because the single-ended design can source only the value of the bias current, and will not operated linearly beyond the bias point. I wanted to construct an amp that had zero negative feed back (0NFB), was pure Class-A and definitely single-ended. The final product sounds absolutely fantastic. The kit comes with superior quality components: 1. There is nothing hidden listening to the Zen. Nelson's company Pass Labs makes some of the finest (and most expensive) amplifiers in the world. ALEPH M - Class A Two-Stage Mosfet SE Amplifier . Was: Previous Price C $180.11. Even a kid can build it and many have! Full output power into 8Ω is 21V p-p for about 27W. I bought one complete kit plus an additional kit not including the chassis and power supply. I bought the aca 1.6 kit as my first project, it was straight forward to put together. Last one . Figure 2 reveals the complete circuit of the amplifier. These are Pass Laboratories ultimate expression of Power Amplifiers the perfect blend of science and visceral emotion. This positive/negative half of an audio signal is an artifice imposed by the desire to efficiently handle an AC only signal, with no DC component. This power supply is Nelson's lab tested recommendation, but to save money you can BYO 19V or 24V 5A laptop style power supply. suitable for 32-320ohm headphone set. When evaluating parts for a scaled-up version, the dissipation and voltage ratings of the components are the elements which deserve attention. As a coincidence, the Mosfet happens to be my gain device of choice in general. As a hat-tip to the Nelson Pass Zen amplifiers and the John Broskie Aikido valve stage, this amplifier has been dubbed the ZenKido. From the time I placed the oder till the time I was enjoying music they were prompt, timely, communicative and have performance standards that rival the very best online stores. It was worth to wait, the ACA sounds amazing with my monitor audio Bronze 2 All current production batches have now sold out. Quick and Easy to BuildEven a kid can build it and many have! The transfer curve of Mosfets reveals serious nonlinearities at low bias currents, resulting in crossover nonlinearity in push-pull designs. One of the exceptions is here, a version of Nelson Pass’ Zen v4 class A amplifier.I built the amp a couple of years ago and it worked but had terrible hum. Any application where the performance is crucial to obtaining accurate numbers, such as in an MRI field amplifier, should be judged by objective means. The gain device in the original Zen amplifier is biased by fixed current source. PHP 1,429.92. It sounds fantastic, very smooth. Single-ended Class A headphone amplifier for desktop Ref Pass Zen brand. ALEPH 3 - Class A Two-Stage Mosfet Amplifier of Pass Labs. I'm EU based, so only ordered the parts kit from DIY Audio, the chassis is from the EU in any case. All type's of post inflated and exaggerated. The official V1.8 build guide with new photos, will be released in the coming weeks. (Finished PASS ZEN single-ended Class A headphone amp. Below 10 watts the distortion is purely second harmonic. For lower impedances, the output stage runs out of current. Free shipping. Einstein said, "Everything should be made as simple as possible, but no simpler." We can achieve this by biasing the circuit with a constant current source and the efficiency climbs to about 20%, or about 5 times better. I am unaware of other solid state offerings in the US, although I expect that my hegemony will be shortlived, with the imminent appearance other single-ended transistor amplifiers. Resolving the apparent conflict between simplicity and objective performance is our goal. energy inefficiency. I've more than 30 years experience listening to Hi-End equipment, but I hardly found a solid state amplifier that's cheap enough and sound that good, the greatest part of this amplifier is simple, though the output just 5W (24V power supply, stereo), but it can drive my Totem Rainmaker (4 Ohm) with quality sound, and less than 10 hours after I finished the construction!
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