Alto Live 1604

It features 10 balanced XLR inputs with switchable phantom power, 3-band EQs with sweepable mids for additional tonal shaping, four aux sends per-channel for external effects and monitoring, and a 9-band graphic EQ for main or monitor outputs. A headphone jack with an independent level control enables additional monitoring and mixing. 60mm faders with LED meters provide precise control and visual feedback for accurate, hands-on mixing. With its diverse connectivity options, Live 1604 can handle any sized event from small coffee house gigs to mid-sized ensembles to full-stage rock bands.

Mono Input Channels
Microphone inputs: Electronically balanced, discrete input configuration
Frequency response: 20 Hz to 20 kHz, +0.5 dB
THD+N: <0.005% at 0 dBu, 1 kHz
Gain range: 0 dB to 50 dB (Mic)
SNR: 90 dB
Line Inputs Electronically balanced
Frequency response: 20 Hz to 20 kHz, +0.5 dB
THD+N: <0.03% at 0 dBu, 1 kHz
Sensitivity range: -15 dBu to 30 dBu

Impedances
Microphone inputs: 51.1 KΩ
Channel insert return: 200 KΩ
All other inputs: >100 KΩ
2-Track outputs: 10 KΩ
All other outputs: 20 KΩ
Equalization – Mono Channels
High-shelving: ±15 dB @ 12 kHz
Mid-bell (mono): ±15 dB sweep able from 100 Hz — 8 KHz
Low-shelving: ±15 dB @ 80 Hz
Equalization – Stereo Channels
High-shelving: ±15 dB @ 12 kHz
High-Mid-bell (mono): ±15 dB @ 3 KHz
Low-Mid-bell (mono): ±15 dB @ 3 KHz
Low-shelving: ±15 dB @ 500 Hz

Main EQ:
9 EQ bands (63 Hz, 125 Hz, 250 Hz, 500 Hz, 1 kHz, 2 kHz, 4 kHz, 8 kHz, 16 kHz), ±15 dB

DSP Section (DFX)
A/D & D/A converters: 24-bit
DSP Resolution: 24-bit
Effects: 10 DSP effects families with 10 variations available per family
Presets: 100 total
Controls: Rotary encoder to select preset, DSP mute switch, peak LED indicator

Main Mix
Noise (bus noise): Fader 0 dB, channels muted: -84 dBr (ref: +4 dBu)
Fader 0 dB, all input channels assigned & set to unity gain: -73 dBr (ref: +4 dBu)
Phantom Power: Mic Pin2/Pin3 and Pin1 48±2V

Power Supply
Main voltage:
USA/Canada: 100-120 VAC ~60 Hz
UK/Australia: 240 VAC ~50 Hz
Europe: 210-240 VAC ~50 Hz
Power consumption: 35 W
Fuse: 1.25 A
Main connection: Standard IEC receptacle
Dimensions
(w x d x h)
19.4” x 16.4” x 3.1” / 492mm x 417 mm x 79 mm
Weight
13.1 lbs. / 5.9 k