Audio GD SA-2 met singularity bord upgrade (Magma Hifi)

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Beschrijving
Deze audiogd SA-2 heeft de volgende upgrades gehad vanuit Magma Hifi.

- Master 7 singularity bord
- HDMI als I2S aansluiting

Een upgrade van bijna 500,00 euro.

Gaat weg omdat ik overgegaan ben naar Devialet waar alles in 1 zit.

Staat ook op Marktplaats en hier aangeboden voor €899,00

Fully discrete Diamond Difference design, without any OPA and couple caps in the signal channels.
High working voltage (+/-35VDC) class A design
Uses 3 units R-core transformer
Total of 20 groups dedicated power circuits (11 groups of high-quality Class A parallel connection PSU with dedicated DC supply double-stage PSU power supply for digital parts, 8 groups discrete dedicated linear double-stage PSU power supply for analog parts ) and more than 35,000uF caps are used to purify the power supply.
Uses most Hi-end grade parts and exact match transistors.
6 groups digital input: BNC coaxial / AES / RCA coaxial / Optical / USB / I2S
output : RCA *3
USB Audio Class 2 High-speed Input from Windows / MAC / Linux
Supports High / full speed Asynchronous Transfer Mode up to 384K / 32Bit ability .
Resolutions support 16 / 24 / 32 Bit with sampling rate support 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz (USB)
Supports up to 24 Bit/192KHz ( SPDIF )
The DSP digital processor can supports NOS, 2X, 4X and 8X oversampling customers setting.

What's new in the SA-2 (Upgrade from Reference 9)

The full new design DSP processor solder on the main board direct for best signal transfer and faster process data and clock, it have better jitter refuse performance.
Supports up to 32bit / 192KHz through USB and I2S input, 24bit / 192KHz through SPDIF inputs (NOS, 2X, 4X and 8X oversampling support.)
It is a full new design concept. The SPDIF inputs have applied specialty interface process the data, this is allow the best parameter design for different type SPDIF inputs.
IN1 : BNC input ,up to 24bit / 96KHz support .
IN2: AES input, up to 24bit / 192KHz support .
IN3, RCA coaxial input, up to 24bit / 192KHz support .
IN4, optical input , up to 24bit / 96KHz support .
IN5 , I2S input, ,up to 32bit / 192KHz support .
IN6 , USB input, ,up to 32bit / 192KHz support .

Diamond differential output circuits
Benefit from two high speed diamond differential output circuits, excellent linearity and low phase distortion, diamond differential circuit is being loved and supported by more and more audio fans. Although the circuit is complex, the sound quality is impressive. We've done a lot of study and experiments on diamond differential current these many years, aiming to get a better solution of circuit design.

For a DAC, high analyzing ability is the most important requirement. The detailed recurrence of resolution lies in the upward and downward characteristics and the noise level of the output amplifier. Because output amplifier is the bottleneck, if the upward characteristic is not good enough, the signal cannot be followed correctly on time and the amplifier can only catch half or even less of the signal level before it disappears. This leads to a downsizing of the original range of signal output from DAC, which directly causes obscurity or even loss of sound effect and a low analyzing ability. A lot of DACs, therefore, even with a highly analytical D/A converter in the digital section, cannot play most of the details due to its low analog circuit speed. To get a good upward characteristic, the only way is to use a high-speed low-noise transistor amplifier. Even operational amplifier and tube cannot compare with high-speed low-noise transistor amplifier in effectively lowering the TIM distortion which has a big impact on the sound quality and promising a pure and pleasant sound delivery.

Output buffer:
The output buffers are Non-feedback. For low impedance, we applied the dual FET buffer output stage which is quite less colored than most conventional circuits.

DSP processor:
DAC SA-2 has built in DSP processor, which is a Two-channel Digital Interpolation Filter and data in-phase processor for digital audio. This Device offers advanced features for high-performance digital signal processing (DSP) applications up to 250-MHz. Data and Master-clock in-phase processing are without jitters. So DAC SA-2 can offer a clear and focused soundstage, apart from accurate and neutral reproduction of the recorded disc/music.

Power supply:
SA-2 applies the excellent 4 pcs PCM1704UK and excellent analog output stages, but these are not the only keys of the best sound. The power supply is most important. Even applying the best DA chip and the best amp, if matched to a normal power supply, the total sound may still be average or sound musical, but can't be neutral and detailed. That is why it is easy to find hi-end grade gears maybe without the best chips or amp stages, but with plenteous dedicated DC supply circuits.

The SA-2 had total 20 PSU groups are applied. Uses 11 groups of high-quality class A parallel connection PSU with dedicated DC supply double-stage PSU power supply for the digital parts in the SA-2 , which can offer very clear DC power for the DAC, producing a very black background and neutral sound characteristic. The double-stage PSU is very important for digital parts. Some designs may have very low jitter in theory, but if the power is supplied by a dirty or low-speed power supply, it will increase the jitter and pollute the data, and degrade the sound quality obviously.

The class A parallel connection PSU has very high input impedance to avoid pulse through the PSU from affecting the DAC and low output impedance with very fast speed and high linearity, so it is a very clean power supply. In my experience, its sound is better than battery power supply, better human sound and neutral.
For the musical sound reproduce, the analog parts power supply by 8 groups discrete dedicated linear double-stage PSU .

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