Owner's Manual

4Ch 2-Way Mode

With the unique features of the Z-Series amplifiers you can also use the Z-150.4 SP to

drive a 2-way system with the front channels for highs and the fear channels for lows.

The unique crossover will let you separate high and low like most 4Ch amps, but with

the added range provided by the multiplier (x10) switch you can actually have a tweeter

crossover as high as 5,000Hz on the front channels. With the SP series' band-pass

functions, you can have the rears play everything below the tweeters, or you can have

the rears play only midrange and use a separate amp for your subs.

For the diagram below of an active 2-way system:

• Front (1/2) crossover is set to HPF and multiplier switch set to x10 (in). HP frequency

is set to the tweeter's recommended cut-off point (usually between 2KHz and 5KHz)

• You can set the Input Mode switch to 2Ch or 4Ch (if you want to fade highs to lows),

but it is safest to use 2Ch mode

• Set the rear filter to LPF/BPF so both the rear filters are active

• Set the LPF/BPF multiplier switch to x10 (in) and set the frequency to the same

frequency that was used on the tweeter high-pass filter

• If the lows speaker will be used as woofers then set the rear (3/4) HPF to around

30Hz as a sub sonic filter

• If another amp will be used for bass and channels 3/4 will be used a midrange, then

set the rear HP filter to the frequency where the woofer will begin operating (usually

80Hz~120Hz)

Z-150.4 SP Speaker Wiring

Standard 4Ch Mode

The Z-150.4 SP four channel amplifier is virtually two 2Ch amps in one chassis and each

set of four speaker terminal can be used exactly as you would use a 2Ch amp. The

advantage of a four channel amp is primarily the saving of space (and a little money).

Using a four channel also reduces the installation work, over installing two 2Ch amps.

This is especially so with some of the unique features of the Z-Series SP amps.

• This is the standard hookup for full range front and rear speakers

• Speakers can be 2Ω~4Ω

• If the head unit has 2 sets of RCA outputs you will be able to fade front to rear.

If you have only one output, you can put the 2Ch/4Ch switch into the 2Ch position

and use only the front (Ch1/2) inputs to feed all 4 channels

• You don't have to use crossovers, but it's wise to use the HPF filters set to 30Hz or a

little more as a sub sonic filter to protect the speakers. Best policy is to check your

speakers frequency range. Set the sub sonic (HP) frequency just a little above to

lowest of the speakers frequency range. i.e If the speakers range is 40Hz~18,000Hz

set filter to 45Hz. The LPF switches should be in FULL

• The HPF Multiplier (x10 switch) must be in the off or x1 position

2 OHM MIN/CH