Fusion 21 CD Player
The new Fusion CD player is the result of nearly twenty five years development of Sugden digital products. Our latest player combines modern digital technology with unique Sugden design criteria's dedicated to high quality audio performance. The heart of the Fusion player is a precision 'CD Engine' comprising of a very accurate loader/laser assembly driven by custom software. The interconnected front-end board (servo) is capable of short term data storage through its on board memory, made possible by the CD disc running at a higher speed than conventional CD mechanisms.
The buffered output from the servo is passed to a dedicated digital interface transceiver. An external high quality master clock allows low jitter recovery of S/PDIF through the high performance internal PLL. The transceiver is also able to clean up (de-jitter) the received digital audio signals. The data signal is re-formatted and the output status bits are selected before being sent to the multi-bit digital to analogue converter. This method of signal processing has made both over sampling and digital filtering redundant. The analogue signal from the DAC is then passes through a current to voltage converter (trans-impedance amplifier) using circuits chosen and developed specifically for their performance and sound quality. To remove any serious audible noise produced in the digital domain, an analogue 55K post filter is incorporated prior to the signal reaching the final pure class A analogue output stage.
To expand the possibilities of digital playback, the Fusion CD player is also capable of acting as a high quality stand-alone digital to analogue converter. When in Standby mode the S/PDIF coaxial input is activated allowing replay of an externally connected digital source.
A21 Series 2 Amplifier
Sugden's first commercial amplifier was the A21 in the mid-1960s. It is generally recognised as the first commercial, solid state Pure Class A amplifier to be available for audio enthusists. It was a very special amplifier with a single-ended Class A output configuration and current feedback. This design concept did not appear generally in commercial audio amplifiers until over a decade later. Capable of recreating a musical performance well in advance of its peers, it made the name of Sugden synonymous with musical performance. The true potential of the output configuration was realised in the 1980s when it was coupled to modern components, reduced internal filtering and multi emitter solid state output devices.
The result was an amplifier of extended and more controlled bass and treble but still retaining the wonderfully detailed mid range of the original design. The amplifier became the A21a, a reference amplifier on many continents. Further improvements have achieved significant enhancement of performance and the amplifier has been rebranded as the Sugden A21a Series 2.
The A21SE is a further expansion of the musical performance available from the Sugden single ended Class A output circuitry. Designed to provide more power output, greater speaker compatibility and a larger sound stage, it is not an uprated A21 Series 2 but a definitive amplifier in its own right.
The SE contains a pre-amp stage with high input impedance, high voltage gain, low noise, wide bandwidth, low distortion and low impedance to drive the Class A power stages. This pre-amp stage coupled to a fifty percent increase in the low impedance power supply enables a very dynamic sound stage to be developed with pin point imaging and fine tonal balance. An amplifier of unforced spontaneity which will satisfy the most discerning enthusiast with ‘simply more music’.
The A21SE is a line level input integrated amplifier without an integrated phono stage option. Sugdens are pleased to offer optional phono stages.