SPL MMC 1 – No Longer Available
The MMC 1 operates in the centre of a mastering environment fulfilling the tasks of speaker management, source connectivity, audio metering, track assignment, master and monitor level setting and automated insert routing of external processors.
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Digital audio formats are subject to further development and change. The degree of incompatibility enforced by the “format war” between PCM and DSD has persuaded us to decide for a technology that is superior in dynamic range, headroom and sound quality – and that is discrete analogue technology in its most advanced implementation.
And there are further requirements speaking for the employment of high-performance analogue technology:
- The number of necessary AD/DA conversions should be reduced to a minimum. Digital sources can be connected to a digital router (i.e. of Z-Systems), which outputs the selected source through the preferred DA converter to the MMC 1. Thus it is ensured that the sound quality remains comparable and is not affected by converter differences.
- From a sound-aesthetical view, high-quality analogue outboard processing is superior to digital processing. The analogue concept allows for problem-free integration of those processors.
- Monitors and power amplifiers are mostly analogue designs. Why have another converter in that chain?
In the MMC 1 SPL’s new SUPRA operation amplifiers are used throughout. They operate at 120 V operating voltage. During a four-year period, SPL has researched this discrete operation amplifier, until the basis of a new generation of analogue audio technology was found. The SUPRA operation amplifier obtains a signal-to-noise ratio of 116dB with an headroom of 34dB. The dynamic range amounts to 150dB with a frequency bandwidth ranging to 200kHz.
With these basic specs, the MMC 1 is beyond the requirements of today's PCM digital formats up to 24 bit and 192kHz sampling rate or DSD digital format with 1 bit and 256 fs.
It is not to be expected that digital technology will offer an environment in foreseeable time, in which the MMC 1 could become a “bottle neck
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