ACL2 PRO - Processor ALTO - Free user manual and instructions
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| Product Type | Audio Processor / Dynamics Processor |
| Model | ACL2 PRO |
| Brand | Alto |
| Dimensions (W x D x H) | 483 x 200 x 44 mm (19" rackmount, 1U) |
| Weight | 3.2 kg |
| Power Supply | 100-240V AC, 50/60 Hz, 30W |
| Input Connectors | 2x XLR/TRS combo jack (balanced) |
| Output Connectors | 2x XLR (balanced) |
| Maximum Input Level | +20 dBu |
| Maximum Output Level | +20 dBu |
| Frequency Response | 20 Hz - 20 kHz (±0.5 dB) |
| Dynamic Range | 110 dB |
| THD+N | <0.003% |
| Compression Ratio | 1:1 to 10:1 |
| Attack Time | 50 µs to 200 ms |
| Release Time | 20 ms to 2 s |
| Noise Gate | Yes, threshold adjustable |
| Bypass Switch | Yes, hard relay bypass |
| Indicators | LED for gain reduction, input/output level, power |
| Main Functions | Compression, limiting, gating, de-essing |
| Maintenance | Clean with dry cloth; avoid liquids |
| Safety | Class I; ensure proper grounding |
| Spare Parts / Reparability | Contact authorized service center |
| General Information | Designed for live sound and studio applications |
Frequently Asked Questions - ACL2 PRO ALTO
How do I connect the ACL2 PRO to my mixer?
Use balanced XLR or TRS cables from your mixer's insert or line output to the input connectors. Connect the output to the next device or mixer input. Ensure the unit is powered on and set to bypass initially.
What is the default compression ratio?
The default compression ratio is typically set to 3:1. You can adjust it using the Ratio knob from 1:1 to 10:1.
Can I use the unit as a limiter?
Yes, set the compression ratio to 10:1 or higher and adjust the threshold to achieve limiting. Use the Output level to control the final volume.
How do I bypass the effect?
Press the Bypass switch. The LED indicator will light up when bypassed. The unit passes the signal without processing.
What does the Gate function do?
The Gate function mutes the signal when it falls below a set threshold, useful for eliminating background noise between signals. Adjust threshold and release time.
How do I clean the device?
Unplug the unit and use a soft, dry cloth to wipe the exterior. Do not use liquids or abrasive cleaners. Ensure the ventilation slots are free of dust.
What is the power consumption?
The ACL2 PRO consumes approximately 30 watts. It operates on 100-240V AC, 50/60 Hz, and comes with a standard IEC power cord.
Does it include a power cord?
Yes, the unit includes a detachable IEC power cord. Use only the supplied cord or a compatible replacement.
How to set up for vocal processing?
Start with a compression ratio of 3:1, attack around 10 ms, release 100 ms, and adjust threshold so that gain reduction is 3-6 dB. Use the Output to match level.
What is the warranty period?
Alto provides a limited warranty of 1 year from date of purchase. Register your product online for warranty service.
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USER MANUAL ACL2 PRO ALTO
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Product information
Brand : ALTO
Model : ACL2 PRO
Category : Processor