Inputs And Controls; Z-150.2 Sp / Z-400.2 Sp Input Ends - zapco Z-150.2 SP Owner's Manual

The Input ends of the SP amplifiers is where you find the signal input connectors
and the various controls. All the SP amps have the same basic functions,
adapted slightly to fit the expected use of each model.
We look first at the stereo (2-Channel) amps. The 550 watt (Bridged @ 4Ω)
Z-150.2 SP and the 1400 watt (bridged @ 4Ω) Z-400.2 SP, since they share
exactly the same functions and controls.
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1• This is the scale for setting the crossover
frequencies to assist in accurate settings
2• Right and left RCA input connectors using
Zapco's proprietary gold plated connectors
3• 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.
4• Variable gain control, see note Setting Gains.
5• A unique feature of the SP crossovers is
the Multiplier x10 switch that allows accurate
frequency setting by changing the crossover
range from 15 Hz ~ 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.
6• 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 sound.

Z-150.2 SP / Z-400.2 SP Input Ends

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7• 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 your sub crossover while HP filter will
be a variable sub-sonic filter as low as 15Hz
8• The low-pass (LP) frequency selector
9• The X10 switch for the LP filter
10• Variable bass boost control 0dB ~ 12dB
11• Variable bass boost on/off
12• Port for the optional bass control
13• The power on (green) LED and the protect
(red) LED
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