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USER GUIDE (ENGLISH)
BOX CONTENTS
• HPA6
• Power Cable
• User Guide
• Safety Instructions & Warranty Information Booklet
1. Make sure all items listed in the Box Contents are included in the box.
2. READ THE SAFETY INSTRUCTION BOOKLET BEFORE USING THE PRODUCT.
3. Switch everything on in the following order:
• audio input sources (i.e. instruments, CD/MP3 players)
• HPA6
• speakers/amps
4. When turning off, always reverse this operation:
• speakers/amps
• HPA6
• last, any input sources
CAUTION! Permanent hearing loss may be caused by exposure to extremely high noise levels. The U.S.
Government's Occupational Safety and Health Administration (OSHA) has specified permissible exposures
to certain noise levels.
According to OSHA, exposure to high sound pressure levels (SPL) in excess of these limits may result in
hearing loss. When using equipment capable of generating high SPL, use hearing protection while such
equipment is under operation.
INTRODUCTION
Thanks for purchasing the Alto Professional HPA6! HPA6 is a universal, multi-purpose mixer and
headphone amplifier for rehearsal, studio, or stage. Perfect for headphones, in-ear monitors, or personal
monitor mixing, HPA6 features six independent high-power stereo amplifiers in one compact rack unit that
delivers maximum audio quality, even at very high or very low volume levels; HPA6 has a minimized circuitry
path which means there's less "stuff" for your signal to pass through, keeping your sound clear and crisp.
• Manufactured under QS9000 certified quality system
• Six independent high-powered headphone amplifiers in a compact, 1RU size
• Supplies six fully independent mixes for up to 18 pairs of headphones
• Stereo Aux Input on each channel with level adjustments
• Additional Direct Input on front panel to mix in additional sources
• Four-segment LED on each channel for easy visual monitoring
• Mono and Left/Right Mutes per channel for two mono mixes per channel
• High-quality components and exceptionally rugged construction
• Servo-balanced, gold-plated XLR and 1/4" TRS connectors
HOURS PER DAY SPL EXAMPLE
8 90 Small gig
6 92 Train
4 95 Subway train
3 97 High level desktop monitors
2 100 Classical music concert
1.5 102 Riveting machine
1 105 Machine factory
.50 110 Airport
.25 or less 115 Rock concert
