Parasound dac 1000 owners manual

Page 1

When you make connections, be careful to avoid tension on either wires or fiber optic cables which might cause damage to the cormectors or cause them to pull loose later on. Do not attempt to bend either coaxial or optical digital cables at a sharp angle, as this may permanently damage them. It is safest to turn ofT the power of your preamp and power amp while making connections, not only for the connections you are making, but to avoid the chance of disturbing adjacent connections. As an additional safeguard, turn your preamp's volume control to minimum before making new cormections. . Optical 1: . Optical 2: . Coaxial output connections are provided on most high quality CD players. You should use only a good quality cable which has been designed for digital data transmission. Cables designed for audio frequencies are not suitable and will not give you satisfactory results. . TOSlink fiber optic connections are also popular and are found on most high quality video laser disc players as well as CD players and CD transports. Your dealer can assist you to select an appropriate optical cable with TOSlink connectors. According to the TOSlink standard, you are restricted to TOSlink cable lengths from 0.2m (A<8") to 10m (-30'). . 81 module fiber optics are considered state-of-the-art. They are superior to either coaxial or TO5link connectors for data transmission. The 5T module employs the AT&T standard; both plastic and glass fiber optic connectors are available for 5T modules connectors. You should experiment among the connector options to detennine which sounds the best in your system. You may find careful extended listening required in order to hear the subtle differences between the different interface technologies accomodated by-the D/AC-IOOO. It is possible to connect three separate digital sources to your D/ AC-l 000 and select among them from the front panel, however RF radiations from the unused digital inputs may "contaminate" the sound of the selected input source. If you have more than one digital source connected, make sure you turn off the power of the unused source(s) until you are ready to listen to it. Outputs Connect the Analog Output jacks to any line-level input on your preamplifier or even your power amplifier if it is equipped with level controls. Use only high quality hookups to preserve detail and clarity. Make sure your preamp is either turned off or its volume set to minimum when making these connections. If you have a digital recorder (DAT, MD, DCC, CD-R), you may connect its record input to the D/AC-IOOO's Digital Output Record jack. This is an RCA type connector; use only digital quality cable. Connecting Your D/AC-1000

Page 2

AC Power Your D/ AC-l 000 has an IEC standard detachable power cord which has been specially selected for its contribution to the sound quality of this unit. Try to connect only this cord directly to a nearby AC wall outlet and avoid extension cords or connection to accessory outlets on your preamp. If you are considering an AC line conditioner, be advised that it may not have a positive influence on the sound ofyourD/AC-lOOO. Power Oo/Off Push the upper section of the b~tton to turn on; lower section for off. Sampling Frequency LEDs Your D/ AC-l 000 will recognize the digital signal of whatever type of digital source you connect and will switch to the correct sampling rate automatically. The 44.1 kHz sampling rate is standard for compact discs. . ErrorlData LED In case there is an interuption of data from the digital source or a malfunction of the digital source or connection, the ErrorIData LED will illuminate. This shows you that your D/ AC-l 000 is not receiving correct digital data to process and convert to analog. In this case, a muting circuit will prevent a "garbage" signal passed to Analog Out or the Digital Out Record jacks. Input Select Buttons and LEDs The three Input Select buttons correspond to the three different types of input cormectors on the rearpane1: Coaxial, Optical!, Optical 2. Polarity Invert Button and LED This button allows you to select between 00 normal opemtion and 1800 inverted polarity. Even if you know if your preamplifier and power amplifier are inverting or non-inverting designs, you have no way to know which of your CD's may have been recorded with inverted absolute polarity. . Absolute polarity is not the same as Left-Right loudspeaker phasing. Absolute polarity means the + and - of both channels are reproduced so the compression wave of an initial musical attack correlates to the compression wave ( +) from outgoing speaker diaphragm motion rather than rarefraction (-) of ingoing speaker diaphragm motion. Your choice of 0° or 180° polarity will be strictly a matter of taste. It may be easier to detect differences between 0° and 1800 polarity with some recordings than with others. Don't be discouraged if you cannot hear the difference - not everyone can identify absolute polarity. De-Emphasis LED Some digital recordings are encoded with pre-emphasis contouring. Your D/ AC-l 000 automatic- ally recognizes and processes them. An LED illuminates as a beacon for visual confirmation. Operating your D/AC-1000