Crate LS4 User's Guide download pdf (Page 6)

LS4

24dB/Octave Active Stereo Crossover

The CD Horn EQ Switch:

The CD Horn EQ switch (#9,#20) allows the user to boost the upper frequencies by 12dB to compensate for

Constant-Directivity horns. The chart below illustrates the effect of this switch.

How to Use the Crossover:

With a Subwoofer:

Adding a subwoofer requires an additional power amplifier and a couple of cables. The basic connections are illus-

trated below.

Connect the line level output of your source (mixer, preamp, etc.) to the CHANNEL ONE BALANCED INPUT of the LS4 (A).

Connect the LS4’s CHANNEL ONE LOW OUT to the input jack of the amplifier which will be used to power the sub-

woofer (B). Connect the LS4’s CHANNEL ONE HIGH OUT to the input jack of the amplifier which will be used to power

the upper range speaker cabinet (C). (Hint: Label the amplifiers “subwoofer amp” and “upper range amp” to avoid

confusion.) Connect the amplifiers to their respective speakers. Repeat for channel two if used.

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Crate LS4 User's Guide Page 6