Alto ZEPHYR User Manual

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analog modeling synth
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BOX CONTENTS
y ZEPHYR mixer
y Power adapter
y Quickstart Guide
y Safety Instructions & Warranty Information booklet
CONNECTION DIAGRAM
Power
House Speakers*
Monitors*
Keyboard*
Drum Machine*
Microphones*
Headphones*
External effects rack,
compressor, etc.*
Notes:
y Microphones, monitors, amplifier, speakers, cables, etc. are not included.
y To reduce electrical hum at high gain settings, keep the mixer's power supply away from your guitar
cable and the mixer's channel inputs.
y To use an external effects rack unit, compressor, etc., use a Y-cable (1/4" stereo to two 1/4" mono) to
connect the AUX SEND "2 FX" output to the left and right inputs your external device. Connect the
outputs of your external device to the left and right AUX RETURN INPUTS.
* not included

Alto ZEPHYR Specifications

Frequency and Gain

frequency response	20 Hz – 22 kHz (±1 dB)
total harmonic distortion plus noise (THD+N)	< 0.005% (@ 4 dBu, 1 kHz)
gain range (Mic inputs, Channels 1-2)	0 – 50 dB
gain range (Line inputs, Channels 1-2)	15 dBu – 35 dBu
gain range (Line inputs, Channels 3-6)	-20 dBu – +20 dBu
max voltage gain (MIC INPUT to MAIN MIX OUTPUT)	70 dB
max voltage gain (MIC INPUT to CTRL ROOM / PHONES OUTPUT)	80 dB
max voltage gain (MIC INPUT to AUX SEND)	60 dB

Signal to Noise, Power and Impedance

signal-to-noise ratio (SNR)	> 110 dBu
phantom power	+45 ~ +49V with switch control
impedance (Mic inputs)	3.9 kΩ
impedance (All other inputs)	> 10 kΩ
impedance (Aux outputs)	1 kΩ
impedance (All outputs)	120 Ω

Equalization and Crosstalk

equalization (High)	±15 dB @ 12 kHz
equalization (Mid)	±15 dB @ 2.5 kHz
equalization (Low)	±15 dB @ 80 Hz
crosstalk (Adjacent inputs)	< -80 dB @ 1 kHz
crosstalk (Inputs to outputs)	< -75 dB @ 1 kHz

Main Mix and Power

main mix output (AUX OUTPUT, PHONES OUTPUT)	0 dBu, unbalanced, 1/4" jacks
max output	+22 dBu, unbalanced, 1/4" jacks
bus noise	< -90 dB @ 20 Hz ~ 22 kHz
power supply	18 V, 1000mA
power consumption	18 W

Dimensions and Weight

dimensions (W x D x H)	8" x 9.8" x 2.3" (202 mm x 250 mm x 58 mm)
weight	3.8 lbs (1.7 kg)

Summary

Mixer Features and Controls

Power and Input Connections

Covers power adapter connection and switch operation, plus XLR and 1/4" input types.

Channel Level and EQ Adjustments

Details GAIN, HI EQ (TREBLE), MID EQ, LO EQ (BASS), and CHANNEL PAN controls for audio shaping.

Auxiliary Send and Return Functions

Explains AUX SEND (MON/FX) for routing and AUX RETURN inputs for external device integration.

Output and Monitoring Controls

Describes main mix outputs, control room outputs, headphone jack, and volume controls.

Signal Routing and Power Features

Details 2-TRACK routing, Phantom Power activation, and LED indicators for status monitoring.

Technical Specifications Overview

Audio Performance Specifications

Details frequency response, THD+N, gain range, and signal-to-noise ratio.

Input/Output and Power Details

Lists impedance, equalization ranges, crosstalk, main mix levels, and power supply information.

Physical Characteristics

Provides dimensions and weight of the mixer unit.