Precision Power MP3 Player DAC348 User Manual

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WRESMANU  
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CONTENTS  
(click on a topic to view)  
Congratulations  
Wiring  
Features and Specifications  
Operation  
Inputs / Outputs  
Block Diagram  
Troubleshooting  
Warranty  
Installation  
Wiring  
 
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:  
Total Harmonic Distortion:  
Channel Separation  
Digital Inputs :  
5 Hz - 20 kHz ±0.2dB  
<0.01 %  
>90dB  
Coaxial and Toslink Optical  
11 - 15 volts  
4 VRMS  
Supply Voltage  
Maximum Output (10kLoad)  
Output Impedance  
Dimensions  
30 ohms  
5.125" W  
13.11" L  
1.750" H  
1
 
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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.  
Because most digital head units are in fact combined with analogAM/  
FM and Cassette players, PrecisionPower engineers have included  
analog inputs as well as a Smart Input Selector that monitors the  
Digital inputs and automatically chooses the appropriate source. To  
take advantage of this feature you must connect both the Digital  
(coaxial or optical) and the analog (RCA) outputs to the DAC-348.  
As you have now bypassed the stock circuitry, the volume control on  
your head unit will no longer affect the digital signal. You will need to  
use a preamp or line driver (such as the PAR-245) as the master  
volume control for your system. Refer to the diagram below.  
System Diagram  
Source Unit  
eject  
1
5
2
6
3
7
4
8
Trk 1  
PPI MAR KET ING DPT  
Analog RCA  
BASS  
TREBLE  
BALANCE  
TRACK  
VOLUME  
LEFT  
RIGHT  
FOWARD  
REVERSE  
Digital  
Coaxial RCA  
Or Optical  
R
DAC-348  
Digital to Analog  
Convertor  
Input  
L
R
Input Sentiy  
Rear  
Output  
L
R
Front  
utput  
O
L
LED Select  
1
Power  
2
Frequency Adjust  
3
4
Sub  
Precision  
PAR-245  
Volum
Power  
Low  
Power  
Ini
Low-Mid  
F
High-Mid  
R
Treble  
+
er  
Made in USA  
+
Defeat  
+
+
+
i
d  
re  
PAR-245  
PAR-245  
Preamp/Equalizer  
Front Output  
Rear Output  
POWERCLASS Amplifier  
2
 
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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 subject it to  
immersion or exposure to water.  
Once a location has been chosen, securely mount the  
DAC-348 with four mounting screws. Be Careful! Inspect the  
area underneath to be sure you are not drilling into wires, brake  
or fuel lines, etc. that could be damaged by the drill bit or screws.  
Dimensions  
5.125" W  
13.113  
13.11" L  
1.750" H  
12.656  
4.415  
5.125  
3
 
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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.  
Drill a hole in the firewall  
and use a rubber grommet  
to keep wire from shorting.  
eject  
1
5
2
6
3
7
4
8
Trk  
1
DP  
B
A
S
S
TREBLE  
B
A
L
A
N
C
E
T
R
A
C
K
P
P
I
M
A
R
K
E
T
I
N
G
T
VOLUME  
L
E
F
T
R
I
G
H
T
F
O
W
A
R
D
REVERSE  
Mount the DAC-348 near  
the front of the vehicle to  
minimize signal path lengths  
Power distribution block.  
Run the cables under the  
carpet near the side of the  
vehicle. Be careful not to  
drill or screw into the wires  
when you replace the trim.  
Avoid sharp edges that  
could chafe through the  
insulation.  
For systems over 300 watts,  
add a ground cable from the  
amp to the battery.  
Attach Ground Wires  
firmly to solid metal.  
NOTE  
Before beginning, disconnect the negative (-) terminal of the  
battery prior to working on the positive (+) terminal to prevent  
a short to ground. This is important, unless you want to spend  
the rest of your life with a nickname like "Sparky," or "Smokey."  
Reconnect the negative terminal only after all connections have  
been made.  
4
 
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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 a length of wire as possible.  
Find a location near the DAC that is metal (the floor is ideal) and  
clean an area about the size of a quarter to bare metal. Drill a pilot  
hole in the middle of this area. Be Careful! Inspect the area underneath  
to be sure you are not drilling into wires, brake or fuel lines, etc.  
Terminate the wire with a ring connector and attach it to the bare  
metal using a #8 sheet metal screw and washer (not supplied). We  
suggest crimping and/or soldering this connection.After the connection  
is complete, coat the area with silicone or some similar material to  
Powerlock  
prevent rust from developing.  
Finally, the remote wire needs to  
run to the power antenna (or  
amplifier remote) lead of the head  
unit. This wire supplies a 12 volt  
signal to the DAC-348 when the  
main system is activated.  
Once you have routed the power,  
ground, and remote wires through  
the vehicle, it is time to connect the wires to the DAC-348. Be sure  
that you have not reconnected the ground cable to the negative post  
of the battery.  
Cut off excess wire and, using wire strippers, strip the power, ground  
and remote cables about 1/8 inch. Locate the power, ground, and  
remote Powerlock connector (supplied). On the top of the connector  
are three slotted screws. With a small flat-bladed screwdriver, loosen  
the screws before attempting to insert the cables. After you have  
inserted the stripped end of each cable into the connector, secure it  
by tightening the associated screw. Check that each connection is  
tight. If the wires are secure, the connector may be plugged into the  
DAC-348.  
5
 
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INPUTS / OUTPUTS  
1 Connect the Digital output from your source to the appropriate  
Digital Input connector (coax or Toslink optical).  
After connecting Power, Ground, and Remote wires, plug in the  
2
Powerlock connector here.  
3
5 amp Fuse  
Parallel Analog Outputs to Preamp.  
Analog Inputs from source unit.  
A
B
C Sync LED - Red light indicates digital signal being processed.  
Power LED - Red light indicates power on.  
D
Analog Outputs  
L
Analog Inputs  
L
L
A
B
B
A
R
R
R
Sync Power  
A
A
C
D
6
 
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BLOCK DIAGRAM  
Smart Input Selector  
7
 
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TROUBLE SHOOTING  
NO SOUND  
IS THE POWER LED LIT?  
YES  
YES  
NO  
Check Power and Remote turn-on wire  
for voltage. Make sure Ground wire is  
secure.  
IS THE SYNC LED LIT?  
NO  
Unplug the Digital Input cable  
from the DAC-348  
Bypass the DAC-348 by connecting  
the analog RCA input cables directly  
to the Preamp (PAR-245).  
ANY SOUND NOW?  
YES  
NO  
Problem is in the DAC. See your  
local Authorized PrecisionPower  
Dealer or call 1-800-62POWER.  
Problem is elsewhere in the system.  
Check head unit and amplifiers.  
ANY SOUND NOW?  
NO  
YES  
Problem is in the DAC. See your  
local Authorized PrecisionPower  
Dealer or call 1-800-62POWER.  
Problem is elsewhere in the system.  
Check head unit and amplifiers.  
SOUND IN ONE CHANNEL ONLY  
IS THE SYNC LED LIT?  
YES  
NO  
Check Balance control. Reverse left  
and right RCA inputs  
SOUND IS NOW IN  
SAME CHANNEL  
Problem is in the RCA cables  
OPPOSITE CHANNEL  
Problem is in the head unit or RCA  
cables  
Reverse left and right RCA outputs  
SOUND IS NOW IN  
OPPOSITE CHANNEL  
SAME CHANNEL  
Problem is downstream of the  
DAC-348  
Problem is in the DAC. See your  
local Authorized PrecisionPower  
Dealer or call 1-800-62POWER.  
8
 
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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 warranty. The  
extent and conditions of Limited Warranty are as follows:  
1. Authorized Dealer Installed Products: PrecisionPower will either repair or replace at no charge,  
to the original purchaser, any unit which PrecisionPower’s examination discloses to be defective  
and under warranty, provided the defect occurs within three (3) years from the date of original  
purchase when the unit is installed by an Authorized Dealer and the product is returned immedi-  
ately to PrecisionPower. This warranty is not transferable.  
2. Non-Authorized Dealer Installed Products: PrecisionPower will either repair or replace at no  
charge, to the original purchaser, any unit which PrecisionPower’s examination discloses to be  
defective and under warranty, provided the defect occurs within ninety (90) days from the date of  
purchase and the product is returned immediately to PrecisionPower. Warranty claims beyond  
ninety (90) days for Non-Authorized Dealer Installed Products will be for parts only and will  
extend for one (1) year from the date of purchase. This warranty is not transferable.  
3. The date of purchase and proof of Authorized Dealer Installation of a PrecisionPower product  
must be established by an original sales receipt which must accompany the article being re-  
turned for warranty work.  
4. This warranty shall NOT apply to any PrecisionPower product found to have the original fac-  
tory serial number removed or defaced. All products received (by PrecisionPower) for in war-  
ranty or out of warranty repair, with their original serial numbers removed or defaced, will NOT be  
repaired and will be returned to sender, freight collect. Refer to original packaging for the serial  
number of your component speakers.  
5. The provisions of this warranty shall not apply to any PrecisionPower product used for a  
purpose for which it is not designed, which has been repaired or altered in any way, or which has  
been connected, installed, or adjusted other than in accordance with the instructions furnished in  
PrecisionPower’s owner’s manual. Nor shall this warranty apply to any part which has been  
subject to misuse, neglect, or accident.  
6. PrecisionPower does not authorize any other persons to assume any other liability in connec-  
tion with its products. THIS WARRANTY IS THE ONLY EXPRESS WARRANTY MADE BY  
PRECISIONPOWER APPLICABLE TO ITS PRODUCTS. ANY IMPLIED WARRANTY OR MER-  
CHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE APPLICABLE TO  
PRECISIONPOWER PRODUCTS IS LIMITED IN DURATION TO THE DURATION OF THIS  
LIMITED WARRANTY. PRECISIONPOWER SHALL NOT BE LIABLE FOR THE INCIDENTAL,  
CONSEQUENTIAL, OR COMMERCIAL DAMAGES RESULTING FROM THE BREACH OF THIS  
WRITTEN WARRANTY. Some states or provinces do not allow the exclusion or limitation of  
incidental or consequential damages or limitations on how long an implied warranty lasts; so the  
above limitations or exclusions may not apply to you.  
7. Your product will be serviced on an in-warranty basis within the warranty period for the correc-  
tion of warranted defects. If improper operation of your PrecisionPower product should occur,  
contact your Authorized Dealer for assistance with the return and factory repair of your  
PrecisionPower  
product. If an Authorized Dealer is not available, return the unit including your name, telephone  
number, return address, a copy of your sales receipt, and a description of the problem to:  
PrecisionPower,Inc.  
Service Department  
4829 S. 38th Street  
Phoenix, AZ 85040-2964  
TO RETURN PRECISIONPOWER PRODUCTS OUT OF WARRANTY: Return the unit, postage  
prepaid, in the original protective carton. Please include a description of the problem and, if  
desired, a request for an estimate of repair costs. Unless a request for an estimate is included,  
the unit will be repaired as necessary. Please contact PrecisionPower Customer Service at 1-  
800-62-POWER for questions concerning out of warranty repair charges. Repaired unit will be  
returned with an itemized statement, C.O.D.  
 
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