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CONTENTS
(click on a topic to view)
Congratulations Wiring
Features and Specifications Inputs / Outputs
Operation Block Diagram
Installation Troubleshooting
Wiring Warranty
TM
DAC348 Digital to Analog Converter OWNERS MANUAL POWER CLASS
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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 TM technology to consistently deliver Absolutely State of the Art performance, sound quality, reliability, and value. This PrecisionPower product reflects our commitment to offer you unparalleled versatility and quality for years of dependable servic
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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 8 fs Frequency Response: 5 Hz - 20 kHz ±0.2dB Total Harmonic Distortion:
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R R R Volume F R + + + + + Power In-Clip Defeat PAR-245 Fader Sub Low Low-Mid High-Mid Treble PrecisionPower PAR-245 Made in USA Input Sensitivity Frequency Adjust 1 2 3 4 Sub Low Low-Mid High-Mid Treble Input Rear Output L L L LED Select Power Output Front 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
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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. Never mount the DAC-348 in a location that would
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WIRING Factory Ground wire may need to be replaced if it is Positive frayed or broken. Battery Terminal Fuse must be installed within 18" of battery Run signal cables (RCAs) and remote turn-on lead down the opposite side of Drill a hole in the firewall the vehicle from the power eject 1 2 3 4 and use a rubber grommet 5 6 7 8 Trk 1 VOLUME BASS BALANCT EREBLE TRACK PPI MAR KET ING DPT LEFT RIGHT FOWARD REVERSE wire to avoid radiated noise. to keep wire from shorting. Mount the DAC-348 near
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T/O B+ 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. As a rule of thumb, use as short
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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. Analog Outputs Analog Input
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BLOCK DIAGRAM Smart Input Selector 7 BACK TO CONTENTS 8x Oversampling, DC Servo Digital Filtering, Coaxial Input and De-emphasis L I to V Low Pass L AMP Burr-Brown Conversion Filter L D to A Converter Decoder DSP L Burr-Brown Analog Outputs R I to V Low Pass D to A Converter AMP Conversion Filter R R Toslink Input R DC Servo L Analog Inputs R
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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 NO Unplug the Digital Input cable Bypass the DAC-348 by connecting from the DAC-348 the analog RCA input cables directly to the Preamp (PAR-245). ANY SOUND NOW? YES NO Problem is in the DAC. See your Problem is elsewhere in the system. local Authorized PrecisionPower Check head unit and amplifiers. Dealer or call 1-800-62POWER. ANY
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WARRANTY 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. Non-Authorized Dealer installed products carry a one (1) year parts and ninety (90) days labor limited w
