SPL Director Mk2 Dac Preamplifier Overview:

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The central unit of the HiFi system is the preamplifier. With remote source selection and volume control, retro-look-VU-meter, premium DA-converter and the all superior VOLTAiR technology, the Director Mk2 caters for musical blockbusters.Milled from solidThe massive 45mm volume control knob milled from aluminum is a haptic highlight. Its mass together with the motorized Alps RK27 “Big Blue” potentiometer enhances the “spoon in the honey” feeling even further.The red marker LED ensures good visibility of the volume parameter even in darkened environments.Remote controlThe volume control can be remotely controlled with any infrared remote control.The Director Mk2 learns to communicate with it with the simple push of a button.Learning made easyThis video explains how you can use any infrared remote control to remotely control the volume and the source selection.Source of joyUp to ten (10!) stereo sources can be connected to the Director Mk2. Six of them are for analog and four for digital input signals.The source selection is shown in the dot matrix LED display: IN 1 through IN 6 for the analog inputs. AES, USB, COAX, OPTIC for the digital inputs, where the detected sample rate is displayed after about two seconds. For example U768 = USB input with 768 kHz sampling rate.The source selection can also be operated remotely if the rotary switch is set to the “Remote” position.The Director Mk2 offers two pairs of balanced inputs with XLR connectors and four standard inputs with gold-plated RCA connectors.On the digital side there are four additional inputs. PCM audio is received in S/P-DIF format via coaxial Cinch, optical Toslink and balanced XLR (AES). Both PCM audio and DSD audio can be converted via USB.Well informedThe DAC automatically picks up the sampling rate and resolution of the digital playback source. No matter if a streamer, computer or CD player is connected. No further settings on the Director Mk2 are necessary.The detected sampling rate is shown in the dot matrix LED display. For example, U768 is an acronym for the source “USB” with a sampling rate of 768 kHz.The DAC768The highly acclaimed AKM AK4490 Velvet Sound™ premium DAC chip is used as the converter chip in the optional digital-to-analogue converter, which thanks to its architecture reproduces the finest sound details.It converts PCM audio with a resolution of 32 bits and a sampling rate of up to 768 kHz, which is equivalent to 16 times CD resolution. Direct Stream Digital is also supported up to a resolution of DSD4 or DSD256. In contrast to the DAC 768xs, the DAC768 not only offers an AES/EBU digital input, but also the SPL DLP120 with VOLTAiR technology.The DLP120 (Dual Low-Pass)The analog output of the DAC chip must be filtered by a low pass filter. Phonitor xe has two of them: One for PCM audio and one for DSD audio, since different roll-off frequencies are required.In contrast to all other DACs in the world, the low pass filters here are built using VOLTAiR technology, which provides a plus in dynamics and headroom and sound.Good ol’ timesTwo mechanical VU meters visualize the input levels for the left and right audio channel.With the VU switch you can optimize the display for different signal levels.Tape MonitorA tape monitor circuitry is quite retro.Who still owns a cassette recorder or a tape machine?Who else loops in an equalizer?To put it another way:Who would like to do it and cannot do it because no manufacturer offers a tape monitor circuit anymore?Well, those who want can again.Today’s audio levels are much higher than in the past and many recorders will be overloaded by them.In that case simply press the switch and the level to the recorder is lowered by 10 dB.To compensate, the level from the recorder is increased by 10 dB. Et voilà.Preamp & Direct OutOn the output side, power amplifiers or active loudspeakers can be connected to the preamp output sockets using XLRs.The Direct Out via RCA picks up the output signal before the volume control and thus offers the possibility to connect a headphone amplifier.Everything under control – AMP CTLThe standby mode of devices with 12V trigger input, can be switched on and off via AMP CTL, together with the Director Mk2. This allows, for example, the SPL Performer s800, Performer m1000 or Performer s1200 power amplifiers to be ideally integrated into the set-up.Sounds goodWith all devices of the Professional Fidelity series we develop not only according to plan, but also by ear. Many important components are installed on the circuit boards using Through-hole technology. This way we can ensure that we can use the best sounding components.The VOLTAiR TechnologyThe 120V technology is our reference technology. The 120V technology is unique in the world. It operates at a DC voltage of 120 volts. This is four times that of IC-based semiconductor op-amps. In our Professional Fidelity series, we refer to this unsurpassed technology as VOLTAiR technology.The highest possible audio quality requires the highest possible audio operating voltage.The 120V technology works with +/-60 V. To be able to handle such a high voltage, we have developed special proprietary operational amplifiers that can operate with a DC voltage of +/-60 V: the SPL 120V SUPRA operational amplifiers. This high voltage would destroy conventional components and operational amplifiers.By the way, the “120V” in the name of the technology has nothing to do with the local mains voltage from the mains power socket. This is about the operating voltage inside the device with which the audio signals are processed.The mains voltage from the mains power socket is transformed to the required secondary voltage in the device’s internal linear power supply with toroidal transformer. Rectifiers convert this AC voltage into DC voltage required in the audio device.