TM DAC348 Digital to Analog Converter OWNERS MANUAL POWER CLASS CONTENTS (click on a topic to view) Congratulations Wiring Features and Specifications Inputs / Outputs Operation Block Diagram Installation Troubleshooting Wiring Warranty
Congratulations and thank you..... for choosing PrecisionPower audio epuipment. At PrecisionPower we proudly design, engineer and manufacture audio products at our facility in Phoenix, Arizona. Our award winning engineering team utilizes innovative technology to consistently deliver Absolutely State of the Art performance, sound quality, reliability, and value.
FEATURES / SPECIFICATIONS PWM Power Supply True 24-bit Digital Signal Processing Class "A" Analog Stages Direct-Coupled Analog Circuitry Dual RCA Outputs Analog Pass-Through Smart Input Selection Gold Plated RCA Input and Output Connectors Optical and Coax Digital Inputs Completely Designed And Handcrafted In The USA Three Year Warranty when installed by an Authorized PrecisionPower Dealer Specifications Oversampling Frequency Response: Total Harmonic Distortion: Channel Separation Digital Inputs : Supply
OPERATION PrecisionPower's DAC-348 processes the digital signal directly from the CD player, changer or other digital source. All digital to analog conversion as well as the subsequent filtering and analog treatment of the signal by the stock source unit is replaced by the superior digital signal processing, digital to analog conversion and fully discrete Class A analog circuitry of the DAC-348.
INSTALLATION / MOUNTING Mounting To prevent damage to the DAC while driving, mount it in a secure place. Choosing the appropriate location will depend upon your vehicle and the complexity of your system design. Keep in mind that the output of the DAC-348 must go to a preamp to control the volume of the digital source. To keep the signal path as short as possible, the DAC-348 should be mounted as close to the head unit and preamp as possible.
WIRING Factory Ground wire may need to be replaced if it is frayed or broken. Positive Battery Terminal Fuse must be installed within 18" of battery Run signal cables (RCAs) and remote turn-on lead down the opposite side of the vehicle from the power wire to avoid radiated noise. eject BASS LEFT 1 2 5 6 3 4 7 8 Trk 1 TREBLE BALANCE VOLUME TRACK RIGHT FOWARD PPI MAR KET ING DPT REVERSE Drill a hole in the firewall and use a rubber grommet to keep wire from shorting.
WIRING The next step is to connect the Power, Ground, and Remote wires to your DAC-348. The power wire should run from the mounting location through the vehicle to the battery or power distribution block. Avoid sharp corners, creases, and sharp body parts. When passing through any metal wall (i.e. firewall etc.), a grommet must be used to prevent the wire from chaffing and shorting to ground. The ground wire should be of the same gauge as the power wire.
INPUTS / OUTPUTS 1 Connect the Digital output from your source to the appropriate Digital Input connector (coax or Toslink optical). 2 After connecting Power, Ground, and Remote wires, plug in the Powerlock connector here. 3 5 amp Fuse A Parallel Analog Outputs to Preamp. B Analog Inputs from source unit. C Sync LED - Red light indicates digital signal being processed. D Power LED - Red light indicates power on.
Toslink Input Coaxial Input Decoder DSP 8x Oversampling, Digital Filtering, and De-emphasis R L Burr-Brown D to A Converter Burr-Brown D to A Converter I to V Conversion I to V Conversion DC Servo DC Servo Low Pass Filter Low Pass Filter AMP AMP R L R Analog Inputs L R R Analog Outputs L L BLOCK DIAGRAM Smart Input Selector 7 BACK TO CONTENTS
TROUBLE SHOOTING NO SOUND IS THE POWER LED LIT? YES NO Check Power and Remote turn-on wire for voltage. Make sure Ground wire is secure. IS THE SYNC LED LIT? YES Unplug the Digital Input cable from the DAC-348 NO Bypass the DAC-348 by connecting the analog RCA input cables directly to the Preamp (PAR-245). ANY SOUND NOW? YES Problem is in the DAC. See your local Authorized PrecisionPower Dealer or call 1-800-62POWER. NO Problem is elsewhere in the system. Check head unit and amplifiers.
WA R R A N T Y Three-Year Limited U.S.A. Warranty This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. PrecisionPower warrants its products to be free from defects in materials and workmanship under normal use and service for a period of three (3) years from the date of original purchase when the unit is installed by an Authorized Dealer.
