AM 833S

Flagship power amplifier.  The best of the best.  130W/ch, Pure Class A, Single Ended. 

 

Price: Please contact us for pricing on this special product.                 
                         

Fang, who is now Audio Music, has been steadily working away for over twenty years in his search for audio perfection. He teamed up with a Salesman partner to form Stereo Knight and 
designed one of the finest pre amps ever made in the very substantial Magnetic Enigma, and then the 45kG monster, the Magnetic Enigma Silver, which was the best pre amp that I had ever 
heard. He also made the quite astonishing Stereo Knight M100 Monoblocks using KT120s running in Pure Class A in a fully Balanced design. These became one of my best sellers and had 
a perfect record in that everyone who did a home demonstration of them kept them. But Fang believed that there were too many compromises in anything other than a perfectly executed 
Pure Class A Single Ended design. He was close to perfecting this when Stereo Knight came to an end, due to the pressures of the GFC and partnership problems.
However, the development went on, and so Fang decided there is no partner like no partner at all and so founded AM Music, releasing the 805SE Monoblock Amplifiers and the quite awesome 
R-S Transformer Pre Amp, which had been released for a short time as a Stereo Knight, and had a quite extraordinary sound. He also re-released an upgraded version of the Magnetic Enigma. 
This is a minimalist in operation, but no effort spared, quite over the top, nothing to degrade the audio, everything he had learned Preamp, the RT-1. He needed tis to drive his Crowning Glory. 
The Nothing spared, whatever it takes to achieve the absolute in music reproduction. The AM 833S Monoblocks. Standing nearly half a meter high and weighing a svelte 75.4kG each. 
The construction and execution of the design is extraordinary. There is not a sign of a shortcut anywhere. The amazing looking 833 tube runs in Pure Class A Single Ended,using a KT88 as a driver, 
for a very impressive 120 w/ch.

The AM 833S is an absolute state-of-the-art, no compromise design to celebrate AM's 10th Anniversary.

* Both the amplifier and the power supply sections are isolated to reduce magnetic field interference from the two massive double C HIB power transformers, thus ensuring that only pure power is supplied to the amplifier.

The signal circuit is direct coupled and transformer coupled, eliminating capacitors from the signal path to avoid any compression of the dynamic range.

The multiple independent power supplies use an effective ?-shaped filter circuit for exceptional noise isolation.

* All the tube heaters use silicone-diode rectification. The -shaped filter coke transformers are DC coupled to a large volume condenser to minimise hum.

Both the drive and output transformers both use a very complicated winding technique and are constructed of special magnetic materials so that a bandwidth of 10Hz- 120KHz. is achieved.

The 833 tube sockets are machined from Teflon, and use gold plated phosphor bronze round pins for an exceptional contact and improved sound quality.

The internal wiring is either silver or a special customised rectangular OCC copper wire which was carefully chosen over a long period by extensive listening.

* The chassis is constructed of a very thick aluminium alloy, precisely machined by precision CNC machinery to ensure it is very strong, stable and reliable.

It is this attention to detail and lack of compromises that result in an exceptionally musical and stunningly clear sound reproduction.


The English Distributor, Iain Borthwick was lucky to get the first one in production. Mine were the second pair. These are his comments on firing them up.  I agree completely. 

Pros.

1) They look incredible and the build is up there with the best
2) Even cold and not run in they are easily the best amplifies I have heard.
3) The midrange is sublime and human voice effortless and so real.
4) The bass is effortless and incredibly articulate.
5) These will obviously improve as they get played in. Awesome.
6) No noise whatsoever. No hiss, no hum, no farting noises. Fang really has excelled himself. In a different league to StereoKnight.
7) Inky silent background due to incredible noise floor.

Cons.
1) Bloody heavy but look stunning.

Data specifications

 

 Power Tube: 833

 Tube complement: ECC88 as the drivers, KT150.  As the amplifiers . 833

 Frequency response: 20Hz-100KHz

 Input Impedance: 100k ohms

 Input Impedance: 100k ohms

 Input sensitivity: 1.0Vrms

 S / N: > 98dB

 Input selections: RCA single-ended ; balanced / XLR

 Power Output: 130w

 Load impedance: 4 & 8 ohms

 Power consumption: 400W(each)

 Power supply: 100,110,120,220,230,240 VAC 50-60Hz

 Dimensions: (W * D * H) amplifier 340 X 450 X 292 (mm)------- Power supply 340 X 450 X 200 (mm)

 Weight amplifier: 30.7kg x2 . Power supply 44.7kg x2 ...

 

Typical Owners Feedback. (We have never had a negative feedback)

Garry

Geelong

As soon as I walked into your room at the Show, I knew I had found the sound quality that I have been looking for a long time.  I got sick of buying expensive equipment that just didn't do it, so I spent a ridiculous amount of money on what was supposed to be the best.  As soon as you connected your AM 833M that I had heard at the Show, to my system in place of my $150,000 Mono-blocks, I could not believe that big an improvement was possible, so my first thought was "What are the big ones like?   When you bought them down I only had to listen to one track to know that these were never going to leave here.

Osborn Loudspeakers

info@osborn.com.au

+613 9390 1564

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