5. DEVICE MANAGER. This is where you are going to select the first device you which to adjust. In the drop down menu you will find all of the devices that are in ...
Digital Reference Features • • • • • • • • • • • • • •
Input and output gain adjustment Input mode Stereo, rt,lft or sum mono Crossover mode : High pass, low pass, or band pass Crossover slope adjustment from 6-24db 10 band parametric eq per channel Time delay by both time and distance adjustable per channel 5 presets built into each amp Save to file feature Balanced line input using symbilink technology User friendly software program Amplifier network capability Phase Adjustment 0-180 Global presets Master volume control.
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The Zapco Digital Program
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This is the Zapco Digital Program Screen. The First time you Open it up you may be a little over whelmed. In this Training I will break down each section and explain all the features.
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DEVICE MANAGER This is where you are going to select the first device you which to adjust.
In the drop down menu you will find all of the devices that are in the network that you have installed.
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Channel selector
• This is where you select the output you wish to adjust • You have the option of adjusting in pairs of channels or in individual channels. • For what ever device you are in it will show the respective number of channels • To choose a channel to adjust you simply click on the box beside it.
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Parametric Equalizer Section
• The first row is your level adjustment. • It has+18/-18 db of adjustment • the Q-factor. – Q-factor is the sharpness of the adjustment.
• type of adjustment you want to use – You have three choices Peak, L-sh, H-sh
• The next row is the actual Frequency you wish to adjust.
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Q- Factor Q-factor in the simplest terms is the width of the adjustment. The lower the number on the q-factor the wider the range of frequency will be affected. The larger the number the more exact the curve become. This will be showed on the following pages.
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For the examples of Q-factor below I will be using 500Hz as the frequency to be adjusted with a gain of +10Db. Q=.50
Q=3.00
Q=6.00
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Types of Equalizer adjustments • There are three types of Equalizer adjustments on the DPN program • Peak: Centers on the frequency and adjust that frequency and frequencies above and below depending on the Q selected. • H-SH (High Shelf): Centers on frequency and adjust everything above that frequency evenly • L-SH (Low Shelf): Centers on frequency and adjust everything below that frequency evenly
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The following are examples of the different types of Equalizer adjustments. For the example I will use 500HZ with a gain of +10Db and a Q of 1.00 Peak
L-SH
H-SH
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Crossover Section
• • • • • • • • • •
For the Crossover section you have three different types of Crossover to choose from Low Pass (LP): Cuts all frequency above selected out High Pass (HP): Cuts all frequency below selected out Band Pass (BP): Makes a shelf so only frequencies between the two selected are played You also have the option of selecting the filter type you wish to use LW (Linkwitz-Riely): -6db at crossover frequency BW (Butterworth): -3db at crossover frequency Frequency can be either selected from a drop down menu or manually typed in Slope can be adjusted from 6-24 db/oct Slope is the rate at which the frequencies fall off after the frequency selected.
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The Difference in LW (Linkwitz-Reily) and BW (Butterworth) filters is shown in the following examples. below I will be using a High Pass crossover with a 12db slope. LW
BW
If you will notice in the two graphs the BW crossover is -3db at the crossover point while the LW is -6db at the crossover point
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Crossover slopes • In the Zapco Digital Program you have the option of choosing between four different crossover slopes – 6Db – 12Db – 18Db – 24DB • Technically what the different crossover slopes do is cut the Frequency that you have selected by the slope per octave. – For example a High pass crossover set at 500Hz and a 6Db slope the Frequency amplitude at 250Hz will be 6Db down. – Another example, take the same crossover but change the slope to 18, the frequency amplitude at 250Hz will be 18Db down • In not so technical terms It changes the rate at which the frequencies are cut out. • For Example
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The difference in Crossover slopes. For the example is used a HP, BW crossover at 500 hz +6db slope
+12db slope
+18db slope
+24db slope
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Adjusting the Input Sensitivity, Output level, and channel select
• This is your signal level adjustment section of the program. • In this section you will find; – – – – – –
Input selector (Channel) Gain adjustment (Sensitivity) Attenuation 0db/-12db Selector ( only used for the DSP6-SL Phase Level (output level adjustment)
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The Channel, sensitivity and attenuate controls
• Channel is where you will assign the output: – What input it will run off of – How it will be configured. Stereo (1/2), Mono (1+2), Bridged Left(1), or Bridged Right (2) – This adjustment acts like the Stereo, bridged, L+R sum switch on the Reference and C2K amps
• Sensitivity is your gain adjustment. The number that you select should be close to the voltage input that your are giving the unit. • Attenuate gives you another range of sensitivity Adjustment. – 0 db range is from .25 volts to 2 – -12 db range is from 1-10 volts.
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Output level and Phase adjustment
• Output level gives you the ability to cut the output level of each channel – This comes in to play when running one input into the unit and you need to level match the system
• Phase control changes the phase of the output 0-180. – Reasons for needing to change the phase • Vehicle acoustics can change the phase of a speakers output • Crossover also effects phase. – For every 6db of slope you put the frequency out of phase 45 degrees.
– To correct these problems you can use the Phase control section.
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Time delay
• Time Delay allows you to adjust the arrival time of each speaker to a certain position in the car. • This will improve the sound stage in the vehicle and provide superior imaging and balance.
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Save Now that you have made all your settings it is time to save what you have done. You want to save to at least one of the presets.
You also have the option to save to a file to load in another car for later installs of the same amp.
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load Load is how you access the presets while in the PC Program
It also allows you to load a saved setup onto the amp you are working on.
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