Parasound dac 800 owners manual
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Page 1
When you make connections, be careful to avoid tension on either wires or fiber optic cables which might cause damage to the connectors 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 connections. Digital Inputs The D/ AC-800 offers you three digital inputs with two different interface options: ~ . Coaxial I: RCA jack - 7 SO standard . Coaxial 2: RCAjack - 7S0 standard . Optical: Fiber Optic - TOSlink . 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 many 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 (-8") to 10m (-30'). For most serious music, we believe you will obtain superior results with a high quality coaxial digital input cable, rather than the optical TOSlink input. Yau may fmd careful extended listening required in order to hear the subtle differences between the two different interface technologies accomodated by the D/AC-800. 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 ofT or its volume set to minimum when making these connections. If you have a digital recorder (DAT, MiniDisc, DCC, CD-R), you may connect its record input to the DI AC-800's Digital Output Record jack. This RCA-type connector is a conduit for the digital data stream from your selected digital source, so use only digital quality cable. AC Power Your D/ AC-800 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 of your D/AC-800. Connecting Your D/AC-800
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Operating your D/AC-800 Power On/Off Push the upper section of the button to turn on; lower section for off. Sampling Frequency LEDs Your DI AC-800 will recognize the digital signal of whatever type of digital source you connect and will switch to the correct sampling rate automatically. The 44. 1kHz sampling rate is standard for compact discs, while 32kHz is for future FM digital broadcasts and 48kHz is for DAT. ErrorIData 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 DI AC-800 is not receiving correct digital data to process and convert to analog. In this case, a muting circuit will prevent an unwanted"garbage" signal passed to Analog Out or the Digital Out Record jacks. Input Select and LEDs The three Input Select LEDs correspond to the different input connectors on the rear panel: Coaxial 1, Coaxial 2 and Optical. Your DI AC-800 will automatically select inputs with first priority to Optical, second selection priority to Coaxial 1, third selection priority to Coaxial 3. Since input switching for listening and recording is detennined by this order of priorities, you must turn off any digital sources you don't want to hear or record. There is another very good reason to switch off other digital sources: RF radiations from unselecteed digital sources may "contaminate" the datastream of the selected input source you wish to hear. If you have more than one digital sourcep, make sure you turn off the power of each unused source until you are ready to listen to it. Polarity Invert Button and LED This button allows you to select between 00 normal operation 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 00 or 1800 polarity will be strictly a matter of taste. It may be easier to detect differences between 00 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-800 automatic- ally recognizes and processes them. An LED illuminates as a beacon for visual confinnation.