Alto Professional MIXPACK Quick Start Manual Download Page 6

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TECHNICAL SPECIFICATIONS 

MIXER SECTION: 

FREQUENCY RESPONSE:

 

10 Hz – 55 KHz (+ 3 dB) 

IMPEDANCE:

1.4 K

 (mic input) 

2.5 

K

 (channel insert return) 

> 10 K

 (all other inputs) 

1

 

K

 (tape out) 

120 

 (all other outputs)

 

SNR:

> 94 dB 

THD+N:

0.04% at +4 dBu, 1 KHz (mic, line, and stereo input channels)  

GAIN:

35 dB (mic input) 
15 

dB 

(line 

input)

EQUALIZATION:

High shelving: + 15 dB @ 12 KHz 
Mid-bell: + 15 dB @ 2.5 KHz 
Low 

shelving: 

+ 15 dB @ 80 Hz 

DSP SECTION: 

24-bit A/D and D/A converters 
24-bit 

DSP 

resolution

Effects (16 presets): Reverbs (Hall, Room, Vocal, Plate), Stereo Delay,  

      Delay,  Chorus 

Controls: 16-position selector, clip LED, mute switch with LED indicator 

NOISE (bus noise): 

Fader 0 dB, channels muted: -85dB (ref:+4dBu) 
Fader 0 dB, all input channels set to Unity gain: -81dBr (ref:+4dBu) 

MAX OUTPUT:

  

Balanced outputs: 27dBu 
Aux sends: 22dBu 

SPEAKER SECTION: 

SYSTEM 

TYPE:

 

3-way powered system bi-amp plus passive crossover into satellite 

FREQUENCY RESPONSE:

 

55 Hz – 20 KHz at -10 dB 

SPHERICAL HORN COVERAGE:

 

80° H x 80° V 

POWER:

 

Low Output: 150 W RMS Class AB 
Mid-High Output: 75 W + 75 W RMS Class AB  
Peak: 

600 

Peak

MAX SPL @ 1m:

 

116.5 dB Continuous, 119.5 Peak (calculated) 

SPEAKER SPECIFICATION:

 

12" (318mm) low-frequency driver; 2" (51mm) voice coil;  

6.5" 

(165mm) 

mid-frequency driver; 1" (25mm) voice coil 

1" (25mm) high-frequency compression driver; 1" (25mm) voice coil 

CROSSOVER FREQUENCIES:

 

Active: 125 Hz at 12 dB/Oct. 
Passive: 3 KHz at 12 dB/Oct. with Electronic Dynamic Protections 

AMPLIFIER SECTION: 

IMPEDANCE:

Low: 

 

Mid/High: 8 

 

PROTECTIONS:

 

Soft start, short circuit, DC output voltage, thermal,  
subsonic filter (30 Hz), 24 dB/Oct., limiter/compressor 

DIMENSIONS (W x D x H): 

41.2" x 27.6" x 27.6"

 

(1060mm x 700mm x 700mm) (compact) 

WEIGHT: 

94.8 

lbs 

(43 

kg)

Inrush current at initial switch-on: 6.85A 
Inrush current after power supply interruption: 8.64A 

* Specifications are subject to change without notice.

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