zapco DSP-Z8 IV II Owner's Manual page 12

4a. The CH Output column is where you choose the channel you wish to adjust. This column
lists the speaker channels by position. Next to each speaker position you can use the drop-down
menus to define the function of each Left and Right speaker as Full Range, Tweeter (TW),
Tweeter/Mid, Woofer, Center, or Sub.
: As you assign the functions to the speakers in CH OUTPUT, the system will
4b. Crossovers
engage default crossovers. This is so speakers will be protected should the volume be turned
up unexpectedly. Here you can see the default settings and make the needed adjustments
to the crossovers, to match your particular speakers. You have a wide choice of crossover
styles [See #6 below] and slopes for the crossover filters. Next to the crossovers, you will see
that the section. Here you can see the default delays set by the measurements in the car
Delay
diagram. This delay section allows the experienced tuner to make fine adjustments if
needed, but for most users the automatic settings done by the program will work best.
4c. Next you can adjust the physical and acoustic phase (polarity) of each pair of speakers
and between pairs*.
4d. This is made easier with the Mute and Solo buttons, which allow you the listen only to the
speakers you are tuning or even switch between two speakers with the Solo buttons, for A/B
comparisons if you are equalizing Left and Right speakers separately (this is recommended
only for experienced tuners).
for Crossover, Delay and Output level: There are two link functions on the
5. Channel Link
Z8 IV II GUI. This vertical row of link buttons allows the user to link channels so changing one
channel also changes any others in the link group. Most commonly this is used in setting
crossovers. See under System Setup for more information on Linking.
6. Crossover Styles : Here you can choose to have Butterworth, Linkwitz-Riley, or Bessel style
crossovers. The default crossover style on the DSP-Z8 IV series is Linkwitz-Riley @ 24dB/oct.,
as it is phase neutral.
7. Equalizer link buttons : Above the EQ graph you will see a horizontal row of link buttons.
These link buttons are used for the Equalizer only. As with the other link buttons, the active
channel you have chosen will always be highlighted. You can link another channel to it by
clicking the link button. Normally only the active channel is highlighted in the CHANNEL
SELECT row, but when you link channels all the linked channels are highlighted as a reminder
that they are linked. See more under System Setup.
* Phase Polarity 0° or 180° is critical to a sound system. See Polarity, under System Setup. If speakers are not all moving
in the same direction at the same time, no amount of tuning can ever create a correct sound stage or a smooth
frequency response.