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dac-pre MKII
DA converter / preamplifier
arfi-reference-DAC- or arfi-DAC-topology
(4 or 8 converters generate a stereo signal
per (premium) transformer I/V stage)
Output amplifier with two switchable levels
Output transformer outputs XLR and RCA (optional)
Two digital inputs of your choice (AES/EBU, BNC, Cinch, Toslink, or "arfi-optical")
One transformer balanced analog input, XLR and RCA (optional)
Modular slots for additional digital input or a second analog input
fully balanced volume control via switched fixed resistors;
classic operation via rotary knob/motorized potentiometer
Remote control for volume and source selection
optional:
Phono-MM or Phono-MC module,
USB connection to computer via "arfi-optical"
User's manual
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Table of Contents
Summary of Contents for ACOUSENCE dac-pre MKII
- Page 1 MKII DA converter / preamplifier arfi-reference-DAC- or arfi-DAC-topology (4 or 8 converters generate a stereo signal per (premium) transformer I/V stage) Output amplifier with two switchable levels Output transformer outputs XLR and RCA (optional) Two digital inputs of your choice (AES/EBU, BNC, Cinch, Toslink, or "arfi-optical")
- Page 2 ACOUSENCE dac-pre DA converter / preamplifier The new centerpiece of your music system: DA converter and pre-amplifier. Recall your last greatest experience of a live musician's performance! Moments of emotional impact and enrichment of your mind and spirit that music can create.
- Page 3 Versions ACOUSENCE dac-pre "standard" is available in two versions: The works with our sophisticated arfi-DAC topology, i.e. four converter signals generate the stereo signal "reference" per transformer I/V stage. The works with the arfi-reference DAC topology, i.e. eight converter signals generate the stereo signal per premium transformer I/V stage.
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Page 4: Installation
Installation Carefully unpack the unit and please keep the original packaging. The carton is specially designed for this instrument and provides safe protection during subsequent transports. If the unit was exposed to extreme cold (e.g. during transport), wait until the unit has warmed up to room temperature and the condensation has evaporated completely before putting it into operation. -
Page 5: Power Connection
Power connection This device is designed to be operated from a protective earth socket. Please connect the device to an appropriately grounded socket using the enclosed power cord. The power supply required for the main unit can be found on the label. Power cords must be routed so that there is no risk of damage (e.g., from foot traffic or furniture). -
Page 6: Analog Audio Connections
Analog audio connections If only one analog input is equipped, this analog input pair can be found under ANALOG IN. If a second analog input is equipped, this analog input pair can be found under OPTION. The inputs are transformer-balanced as XLR and optionally as RCA jacks. -
Page 7: Digital Audio Connections
- unbalanced 75 Ω (SPDIF) on RCA or BNC socket, galvanically isolated by a high-quality transformer with shield winding and low capacitive coupling. - optical in Toslink standard ACOUSENCE mu-se - optical in "arfi-optical" standard, for connection of an or an... -
Page 8: Operation
Operation Input selection With this rotary switch on the left side of the device, up to four input sources can be selected. Depending on the equipment of the device, individual positions may have no function. Digital 1-2, as well as option (if equipped with digital input), selects the input signal for the DA-converter. - Page 9 Indicator of the sample rate at the input The sample rate indicator shows the frequency of the selected digital input. 44.1kHz is at the bottom, 192kHz is at the top. The other four common sample rates (48kHz, 88.2kHz, 96kHz, 176.4kHz) are in between. If no valid digital signal is present, no LED is lit.
- Page 10 Phono module, adjustment possibilities Internally there are adjustment possibilities to the respective sampling system. Phono-MM capacities from 10pF to 470pf are switchable, with Phono-MC impedances from 100 to 500 Ohm. To do this, please de-energize the unit with the toggle switch at the back of the IEC terminal or unplug the unit.
- Page 11 Care and maintenance of the unit The surfaces of the device should only be wiped with a soft, dry cloth for cleaning. Do not use any harsh cleaning agents or solvents! The device may only be opened by a qualified specialist. Repairs must be carried out by an authorized specialist workshop.
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Page 12: Warranty Conditions
Prerequisites for your warranty claim are: 1. the device must have been purchased from a dealer authorized by ACOUSENCE. 2. the defect must not have been caused by improper handling or tampering with the unit. -
Page 13: Technical Data
Technical data Up to 3 digital inputs, different formats: balanced 110Ω (AES/EBU) to RJ45 Ethercon jack or XLR, galvanically isolated, input voltage according to AES/EBU. Also accepts SPDIF via adapter (as special accessory). unbalanced 75 Ω (SPDIF) to RCA or BNC socket, galvanically isolated, input voltage according to IEC. - Page 14 power supply unit: shielded mains transformer + input filter Input voltage EU version: 230 Volt, 50 Hz Input voltage US version: 115 Volt, 60 Hz Dimensions: 450x50x315mm (case) or with feet 450x57x315mm (WxHxD) Weight: 7 kg Specifications and equipment are subject to change without notice.
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Page 15: Prescribed Use
The device in its original condition complies with the currently valid German and European regulations. It is approved for intended use in the EU. By affixing the CE mark to the unit, ACOUSENCE declares conformity with the EU directives and the national laws derived from them. The necessary tests have been carried out with positive results. - Page 16 ACOUSENCE KG Eleonorenstrasse 5 55597 Woellstein GERMANY Phone: 06703 305230 info@acousence.de www.acousence.de...
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