Sugden a21ii class a the dac4 has been designed with premium sound quality at the top of the list. Sugden masterclass la4 line preamplifier archives the. The la4 was developed to complement the sugden masterclass power amplifiers and at its heart has dual mono, dccoupled, class a, current feed back gain stages. The sugden ia4 is the brands top integrated ampli fier model. The most obvious difference between it and its baby a21a s2 brother was its size. Like the preamplifier this too is handcrafted with mechanical and electronic engineering of the highest standards. Sugden masterclass ia4 pure class a integrated amplifier internal view showing gold plated. I always liked the original sugden a21 in the woooden case wstrange heat sinkhich started me off on the class a kick. As tradition would have it, it is a class a design. Feb 18, 2009 sugden s, in fact, suggests that they were the first company to produce a solidstate class a amplifier for domestic use their original a21 model, introduced in the 1960s. Knowing that i am a big fan of good class a amplifiers, jackfi. The units primary function is simply more music with a neutrality to allow end users to choose mating components and obtain customised.
It uses a class a output stage with a custom built transformer and also a low impedance supply which can fill a much bigger soundstage. The sugden is a bit different and better than most other class a amps which try to stretch the truth that they are pure class a by saying that the amp stays in class a longer blah blah blah they end up in class b they are class ab amps and sound like class ab amps the quick way to tell is to see their power output. Jun 04, 2009 sugden can repair pretty much everything theyve ever made, so theres a lot of folks out there using kit which is 20, 30 years old or more. Sugden masterclass ia4 integrated amplifier sale in very good condition, all in class a. Surprisingly, i dont think i ever managed to go higher than 20% of its volume output with piega primium. Rocky mountain audio fest 2017 standout systems that turned hotel rooms into listening rooms, part 1. The moving coil stage is a class a current feedback circuit and the moving magnet amplifier a class a voltage feedback circuit incorporating the riaa correction in the negative feedback loop. Sugden masterclass ia4 pure class a integrated amplifier internal view showing gold plated circuit boards, high grade components and silver. Sugden amplifiers and pure classa in general page 5. May 11, 2011 patrick from sugden very kindly lent me one of his a21se amps only 30 wattsish class a, what a cracking amp, its about. Sugden masterclass ia4 integrated speaker amplifier. The pure class a solid state output stage equipped with greater power from a custombuilt transformer and low impedance supply can project and fill an enormous holographic sound stage with simply more.
Jun 28, 2015 knowing that i am a big fan of good class a amplifiers, jackfi. I have the sugden fp4 amp with the sugden dap800 preamp its a nice combination. The masterclass ia4 pure class a integrated stereo amplifier has an extraordinary, organic, euphonic, acoustic performance, achieved by the integration of a state of the art preamplifier and the classic sugden class a output stage. Ive always loved my sugden a21a, but the ia4 is like the a21 on steroids. A high quality active pre amplifier featuring a host of inputs and outputs.
Sugden masterclass ia4 class a integrated amplifier location. The a25b was manufactured in 1988 so it wont be older than that. It uses a class a output stage with a custom built transformer and also a low impedance supply which can fill a much bigger soundstage and allow more people to enjoy the great sounding music. It was a scaled down version of the a48b that i owned and operates in class ab.
Today, alongside various preamplifiers and cd players, j. Item is in very good condition without any faults that i can see. Manufacturers of high quality audio products including amplifiers, cd players and speakers since 1967. Oct 09, 20 the ia4 is the largest and most powerful integrated amplifier in the sugden family, offering the ability to fill an enormous holographic sound stage with simply more music. It features a pure class a solid state output stage. Over that kind of period, some components inevitably deteriorate, so a wash and brush up is a good way of keeping optimum performance. These are sugden masterclass mono blocks, original owner, 160 watts pure class a they are a fully balanced xlr design they are in mint condition and have been in dry storage as i have to much audio stuff cleaning out the closet so to speakbeautiful sounding with great sound staging and. Sugden masterclass la4 remote volume class a line preamplifier. I had heard a two sugden set ups at hi fi shows both cd fronted and tailed of with art speakers. Masterclass series technical specifications and facilities masterclass spa4 stereo power amplifier facilities inputs stereo line level, stereo balanced.
Sugden masterclass fpa4 power amplifier sugden from hifi. The la4 makes a perfect combo with either the masterclass or sapphire power amplifiers. Sugden masterclass hi fi world december 2007 soul to sole audio. Ive change my source to a serverdac system and the dac acts as the preamp so i no longer have a need for an integrated amp. Sugden masterclass ia4 integrated amplifier for sale.
Interested to hear your thoughts,i have ordered the masterclass integrated and the ms stereo, whic. This output stage is of the classic sugden pure class a single ended design which has given musical satisfaction to thousands of discerning music lovers over many years. The class a power output circuit has been upgraded from the a21 series with a larger power. During this time the family has grown and benefited from significant improvements and upgrades. Stanalogs george stanwick was pleased as punch with sugdens new masterclass components. The sugden masterclass ia4 amplifier integrates a state of the art preamplifier and the classic sugden class a output stage, resulting in an extrodinary performance. The sugden masterclass phono stage my story in search of my ideal phono stage took me to yorkshire finest, in the form of the masterclass. This is equipped with greater power from a custombuilt transformer and low impedance supply. Class a circuitry is renowned for its recovery of and synergy with, low level signals and sugden is syno.
The award winning masterclass series has been in continuous production for over seventeen years. It is in perfect condition having formed part of a treasured hifi set up. Masterclass series technical specifications and facilities. A couple of years ago i had the chance to come across the sugden brand, in particular the small a21 amplifier that made the history of the brit company and that has been producing, with the relative updates, for fortyfive years the a21 amp holds the essence of james sugdens thought, who designed it in 1967. Sugden a21 signature integrated amplifier page 3 steve. Plenty of input and output facilities are on offer including a high quality phono stage. It sounds natural and a good sountstage,and enough power to drive my kharma db7s speakers. The integrated puts out 33 classa watts per channel with bandwidth specified as 6hz300khz. Weighing a substantial 20 kilos the ia4 has a purposeful look and impressive build quality. Sugden masterclass fpa4 class a amp audiogon discussion forum. Sugden can repair pretty much everything theyve ever made, so theres a lot of folks out there using kit which is 20, 30 years old or more.
The pure class a solid state output stage equipped with greater power. What you get is a tremen dously clean yet massively musical amplifier, with for the first time power aplenty. Sugden masterclass ia4 integrated amplifierthe largest and most powerful integrated amplifier in the sugden family which takes advantage of the initial sugden class a output configuration. Sugden masterclass ia4 remote volume integrated amplifier. Highend touches include gold plated circuit boards, relay switching of all inputs and output and a sophisticated class a output stage. Sugdens, in fact, suggests that they were the first company to produce a solidstate classa amplifier for domestic use their original a21 model, introduced in the 1960s. The improvements to sound quality were simply amazing with even more music being presented. Gold plated circuit boards, full relay switching and a precision input selector switch offer further detailing. Sugden audio masterclass ia4 pure class a integrated. Recent arrivals include an entry level power amplifier, digital converter and headphone pre amplifier. Preamps the sugden masterclass phono stage my story in search of my ideal phono stage took me to yorkshire finest, in the form of the masterclass. Sugden masterclass aa preamplifier, masterclass aa class.
The sugden masterclass integrated amplifier is most powerful and therefore largest integrated amplifier made by sugden. Sugden decided to celebrate the 50thanniversary of the a21, the worlds first production class a transistor amplifier, by developing another. The sugden masterclass ia4 integrated amplifier is most powerful and therefore largest integrated amplifier made by sugden. Masterclass series technical specifications and facilities masterclass spa4 stereo power amplifier facilities inputs stereo line level, stereo balanced outputs stereo pair multi way locking binding posts specification input sensitivity 1volt for full output power output 75watts into 4 ohms both channels working. Recent arrivals include an entry level power amplifier, digital converter and headphone preamplifier. Sugdens masterclass units, then, are an ingenious way of enjoying the bliss of golden age hardware without the anguish, while avoiding limited edition reproductions, vintage refurbs and the like. Sugden masterclass la4 pre amplifierthe sugden masterclass la4 is a line level stereo preamplifier with authority, finesse and the capability to develop a sound stage with imaging, dimensional realism, and timespace elements in perfect harmony. Sugden masterclass fpa4 power amplifier sugden from. The fpa4 power amplifier is the latest member of the sugden masterclass family. The gain stages are each powered by current shunt differential power supplies which enable the fastest transients and most powerful crescendos with true musical empathy. Amplificateur high end sugden masterclass ia4 classe a. Sugden audio master class la4 stereo line preamplifier audiophile. Sugden masterclass pa4 phono amplifier sugden from. The ia4 is sugden s flagship and most popular integrated amplifier.
The active element remains conducting all of the time. Because it is a pure class a single ended design it has a. Sugden masterclass ia4 integrated amplifier master. At home i prefer to use the a21ai as it has a sound i really enjoy and my speakers are 85db. Sugden masterclass mono blocks for sale canuck audio mart.
The class a power output circuit has been upgraded from the a21 series with. Sep 03, 2014 sugden masterclass ia4 integrated amplifier ser. Sugden masterclass ia4 remote volume pure class a integrated stereo amplifier 33 watts. Sugden masterclass ia4 hifi solution sugden masterclass ia4 sugden masterclass ia4.
The pre amplifier section of the ia4 is a bespoke design, with surprising clarity and detail. Like all sugden products each masterclass is handmade. The sugden masterclass ia4 amplifier uses a system of preamp and power amp driven by individual power supplies which enables the ultimate in musical performance. Sugden masterclass pa4 phono amplifier the full potential of the musical magic contained on vinyl discs can only be realised by the passionate treatment of the low level signals emanating from the disc and stylus. Sugden masterclass ia4 integrated amplifier sugden from. I would have no concern about the power output of the a21ai. Sugden masterclass ia4 amplifier trade in available. The need to reduce size means i am reluctantly selling my lovely sugden la4 preamp. Mar 20, 2012 the masterclass ia4 pure class a integrated stereo amplifier has an extraordinary, organic, euphonic, acoustic performance, achieved by the integration of a state of the art preamplifier and the classic sugden class a output stage. Sugden a21se masterclass ia4 2 channel hifi wigwam. The ia4 is our flagship and most popular integrated amplifier.
Sugden masterclass ia4 integrated amp moorgate acoustics. With substantially boosted power and extra facilities, the ia4 set out to bring that crystalline class a sound to a wider audience. Surprisingly, i dont think i ever managed to go higher than 20% of its volume output with piega primium 5. Sugden masterclass la4 class a line pre amplifier the sugden masterclass la4 class a line pre amplifier has authority, finesse and the capability to develop a sound stage with imaging, pin. Sugden masterclass aa preamplifier, masterclass aa class a. Sugden masterclass anv50 integrated amplifier ex demonstration. The sugden masterclass ia4 pure class a integrated amplifier is the largest and most powerful integrated amplifier in the sugden family which takes advantage of the initial sugden class a output configuration. Mit masterclass ia 4 fuhrt sugden vor, wovon andere zumeist nur reden. The sugden masterclass la4 class a line preamplifier is a line level stereo preamplifier with authority, finesse and the capability to develop a sound stage with imaging, dimensional realism, and timespace elements in perfect harmony. All we know about the cd player is its price and that is has classa outputand that it sounded great pumping nickle creek through a.
Comes with all the original paperwork, remote, power lead, box and packaging. The class a power output circuit has been upgraded from the a21 series with a larger power supply and improved soothing and output capacitors. Sugden masterclass anv50 integrated amplifier trade in. This amplifier only has 33w into 8 ohms, but they are full class a. The ia4 is the largest and most powerful integrated amplifier in the sugden family, offering the ability to fill an enormous holographic sound stage with simply more music. Sugden masterclass ia4 integrated amplifier archive. Still not sure if it just the class a that amkes the. For an anniversary product, sugden wanted to design something special, just like when sugden introduced the worlds first pure class a solid state amplifier over fifty years ago.
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