Sugden Audio | neophonics

Sugden Mystro Integrated Amplifier with Moving Magnet Phono Stage (as standard)

The Mystro Integrated Amplifier is a high-end integrated amplifier that puts its competitors (at several times the price) to shame.

Sugden Integrated Amplifiers have been drawing high praise in the audio world for over four decades and the new Mystro model is destined to be greatly hailed and admired. The Mystro is a solid state 50 watts per channel AB amplifier capable of driving a broad range of loudspeakers, specially developed to retain the low level listening advantages of Sugden Class 'A' amplifiers. Manufactured at the Sugden factory in Yorkshire, England, by their dedicated workforce it is their high-end introductory product to a world of music reproduction, a beguiling world of 'Rescuing Music From Technology'.

This Sugden Mystro amplifier has many innovative and original circuits providing the ultimate in reproduction performance. The Mystro has by design an excellent Green Pedigree, fully metal cased, housing RoHs compliant components; it requires very low quiescent and operating power.

The Mystro amplifier is a very fast and dynamic amplifier, which will enthrall and surprise its audience whilst still retaining the hall mark of all Sugden products, Fatigue Free Listening. A superb portrayer of natural instruments, because of the fatigue free sound it is also particularly suitable for reproducing popular music.

The Mystro is the first Sugden amplifier to include a 'VCV' (voltage current voltage) pre amplifier stage. The configuration of this pre-amplifier includes a buffered input, voltage to current converter (Howland Current Pump) and current to voltage output stage. This produces a perfect current, independent of the volume control setting, in the HCP stage, resulting in perfect structure and extremely low signal to noise characteristics. This current drives the virtual earth output stage achieving an exceptional tonal balance, even at very low listening levels.

The pre-amplifier is combined with an AB power amplifier which has been developed over many years to give the best compromise between Class 'A' and Class 'B' type operation. The power amplifiers are configured as dual mono output stages with low impedance power supplies to ensure excellent bass timing. The circuitry has been tuned to give extended high frequency clarity, with purpose and punch, to deal with some of the latest digital recordings techniques. Tremendous headroom has also been included in the tone burst capabilities of the 125-watt, multi emitter, bi-polar output devices.

The whole circuitry results in an amplifier with low noise floor, constant tonal balance, optimum high frequency performance and uncoloured, unrestrained fatigue free sound. A sound, which could only be found in the most expensive designs until now.

Selection of the input signal is by discreet input relays, positioned to minimise the signal paths and operated by a front panel, rotary selector switch. The volume control is accomplised via a front mounted rotary gain control which can also be RC5 remote operated. It operates just like a normal volume control whilst retaining sonic purity.

A large high quality, mono, printed circuit board houses all the selected discreet audio components, together with individually selected, low noise, low distortion, high slew rate and high bandwidth op amps. Most hardware components are mounted directly to the board and where they have hard-wired interfaces these are all of special silver/gold constructions. Observation of the main board reveals a disciplined topography with right and left channels clearly defined and the use of best audio practice techniques.

The power supply is a robust triple secondary wound toroidal transformer of 200va. There are separate windings for each power output channel and a third winding for supplying the pre-amplifier stages. The latter supply is arranged with high impedance channel-to-channel and current shunt supplies to the active stages. The power output stages are smoothed by 6800uf capacitors, resulting in low impedance, fast response power availability to drive and control the connected speakers.

The Sugden Mystro amplifier embodies truly advanced and innovative audio circuitry, developed to its ultimate level, value engineered and subjectively mastered, to create a wondrously musical amplifier.

The Mystro amplifier is only available in titanium finish.

Facilities:

Inputs - Three line level inputs and Moving Magnet phono input.
Outputs - One pair of stereo multi way binding posts suitable for spade or 4mm banana plugs.
Remote Control - Volume up/down.

Specifications:

Line Input Sensitivity - 155mV for maximum output.
Moving Magnet Phono Sensitivity - 2mV.
Power Output - 50 watts per channel into 8 Ohms both channels working. 75 watts per channel into 4 Ohms both channels working.
Frequency Response - 20Hz to 20kHz +/-0.5dB.
Bandwidth - 10Hz to 170kHz +/- 3dB points.
Signal to Noise (Line) - >90dB.
Distortion - @1kHz 1 Watt <0.2%.
Gross Weight - 8kg.
Dimensions - 92mm x 430mm x 310mm (HWD).

E. & O. E.

Sugden A21a Series 2 Remote Volume Pure Class 'A' Integrated Amplifier - 23 watts

The Sugden A21a Pure Class ‘A’ Integrated Amplifier has a lineage stretching back nearly 50 years.

In 1964 James Edward Sugden designed and produced the worlds first commercially available solid state pure Class ‘A’ amplifier the A21.The initial A21 was sold under the Richard Allan brand name, which had an established quality line of loudspeakers.

In 1967 the A21 was marketed under the Sugden brand name. The A21 was for the audiophile the first experience of high fidelity music reproduction in the home.

The latest version, the A21a was released in 1989 and was essentially unchanged for 18 years.The current A21a, now Series 2, was released in 2007 with the following upgrades: heavier chassis and strengthened case, 10mm thick aluminium front panel,remote volume, beefier power supply, deletion of the mono and tape loop switching and the balance control.This has enabled improvements to the pre-amplifier circuit by shortening signal paths.

While the A21a has a legendary heritage it also maintains hand made standards becoming rare in the current automated and mass-produced manufacturing settings.

The A21a is built to Sugden’s uncompromising standards, hand made and individually tested by people who take the same pride in their work as the true craftsman, composer or musician.

The Sugden process starts with design and goes through the procurement of high quality components to detail and final assembly work and testing.Sugden manufacture in-house the metal cases, assemblies, knobs and parts and carry out the finishing processes, including screen-printing.

The result is the A21a is an exceptional amplifier with a musical three-dimensional sound stage that will give you many years of pleasure and enjoyment.

Facilities:

Inputs - Five line level or four line level with optional MM/MC phono board.
Outputs - Pre-Amplifier Out (Variable), tape out (fixed) and one pair stereo multi-way binding posts.
Remote Control - Volume up/down.
Earth terminal.

Specifications:

Line Level Sensitivity - 170mV for maximum output.
Phono Input Sensitivity - 3mV/Moving Magnet, 0.2V/Moving Coil for maximum output.
Phono Loading - Moving Magnet 47K, Moving Coil 100 ohm.
Power Output - 23 watts per channel into 8 ohms both channels working.
Frequency Response - 10Hz to 20kHz +/- 0.5dB.
Bandwidth - 6Hz to 200kHz +/- 3db.
Signal to Noise - >83db.
Nett Weight - 11kg.
Dimensions - 92mm x 430mm x 350mm (HWD).

E. & O. E.

Sugden A21SE Special Edition Remote Volume Pure Class 'A' Integrated Amplifier (Line) - 30 Watts

The A21SE Integrated Amplifier is a single ended solid-state pure class 'A' design. The pre-amplifier has a cascode input stage, current feedback with the input and output being in phase. Other design points include high input impedance, high voltage gain in the first stage with low distortion, wide bandwidth, low noise and very low output impedance. Left and right line stages have current shunt power supplies from a dedicated transformer winding. The input signals are relay switched reducing signal paths to a minimum.

The A21SE is capable of producing music in its most natural and organic form. Free from crossover distortion, power can be delivered smoothly without the high frequency ‘pain’ associated with so many transistor amplifiers.

Facilities:

Inputs - Five line level operated by relays.
Ouputs - Pre-out (variable), tape out (fixed), one pair of stereo multi-way binding posts and LTVS supply for A21SE Stage One Phono Amplifier.
Remote Control - Volume up/down.

Specifications:

Line Input sensitivity - 110mV for maximum output.
Power Output - 30 watts pure Class 'A' into 8 ohms both channels driven. 40 watts pure Class 'A' into 4 ohms both channels driven.
Frequency Response - 20Hz to 20kHz +/- 0.5dB.
Bandwidth - 12Hz to 141kHz +/- 3dB.
Signal to Noise - >84dB.
Packed Weight - 14 kgs.
Dimensions - 115mm x 430mm x 360mm (HWD).

E. & O. E.