Introduction - Alto PS 4 LA EVO Service Manual

1. Introduction

The PS 4/5LA EVO Plastic Speaker Cabinet is designed for professional stage performance. It adopts Italian
design style on the handle. PS 4AL EVO contains a woofer (12" 4 110-220W) and tweeter (15W 8 ), while
the PS 5LA EVO has built-in woofer (15" 4 150-300W) and the tweeter (15-30W 8 ). This plastic cabinet
features clear tone and thick bass to reproduce clean timbre. (PS 4LA EVO & PS 5LA EVO LOW Output
Power200Watt Class AB / HIGH Output Power 50Watt Class AB), which guarantees its availability in any
applications.
Function & Features of speaker module
PS 4LA / 5LA EVO speaker module is designed for matching the PS series plastic speaker cabinet. The
built-in precision electronic crossover separates the HF signal and the LF signal within PRE-AMP before
discrete power amplification so as to exactly reproduce the original sound. The rated power output of bass
power amplifier is RMS 200W at 4 and that of the treble power amplifier is RMS 50W at 8 . If increase the
output power based on unchanged cost of PS 4LA & PS 5LA, the main features are as follows:
1 input volume control knob
1 group of Input Combo jack
1 group of balanced chain output
Clipping LED indicator present input signal strength
Overload and overheat protection
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