The Z-Ii Class Ab Sq Competition Amplifiers; Z-150.2 Ii Input And Controls - zapco Z-150.4 II Owner's Manual

The Input ends of the Z-II amplifiers is where you find the signal input connectors
and the various controls. All the Z-II amps have the same basic functions,
adapted slightly to fit the expected use of each model.
We look first at the stereo (2-Channel) amp. The 550 watt (Bridged @ 4Ω)
Z-150.2 II. Then we will look at the 4-Channel and 6-Channel models to see how
they adapt to multichannel configurations.
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1• Right and left RCA input connectors using
Zapco's proprietary connectors
2• To ease multi-amp installations, the amps
have pass-through RCA outputs so you can
"daisy-chain" multiple amps while only
running one front-to-back RCA
3• Variable gain control
4• A unique feature of the crossovers is
the Multiplier X10 switch that allows accurate
frequency setting by changing the crossover
range from 15Hz ~ 500Hz to 150Hz ~ 5000Hz.
This is so you can use the amp full range, as a
mid range (band-pass), or even as a tweeter amp
5• The high-pass (HP) crossover frequency
selector
Note: If you are using an amp for a band-pass midrange, the HP filter will be the lowest frequency
of the band and the LP filter will be the top of the band. This passes all the frequencies between
them. If you reverse the filters you will have no
Z-150.2 II Input Ends
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6• The Crossover function switch: To the left the
switch is in high-pass mode, in the center the
crossover is out of the signal path (full-range),
to the right both filters are in the circuit so you
can band-pass. If you are using the amp for bass
the LP will be you sub crossover while HP filter
will be a variable sub-sonic filter as low as 15Hz
7• The low-pass (LP) frequency selector
8• The X10 switch for the LP filter
9• Variable bass boost control from 0dB ~ 12dB
10• Port for the optional bass control
11• The power on (green) LED and the protect
(red) LED
sound.
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