The AMT Electronics LLM-2 ZERO is an active optical volume pedal for guitar and keyboards. Because the volume control is optical and the circuit is active, the pedal can mute the instrument completely in the lower position of the pedal, something AMT highlights as a new capability for the design1. The maker lists it as available now1.
The three output ranges
The LLM-2 ZERO changes volume smoothly within one of three output signal level ranges, selected by a switch1. Each range sweeps down to complete silence, but they start at different levels, and the top two can amplify the signal above its input level. On the AMT media center page, the maker describes it as "an active volume pedal that can mute and amplify input signal depending on what mode is selected"2.
| Range | Volume sweep |
|---|---|
| 1 | From +12dB to complete silence1 |
| 2 | From +6dB to complete silence1 |
| 3 | From 0dB to complete silence1 |
In practice, the switch sets how much level is on tap at the top of the pedal's travel. Range 1 gives the most headroom and a boost of up to +12dB, range 2 gives up to +6dB, and range 3 tracks the instrument's own level from 0dB downward1.
Controls and features
Beyond the pedal itself and the range switch, the maker's demo video lists Hi/Low pass filters plus Presence among the unit's features3. The high input impedance of 1MOhm is aimed at keeping the guitar's tone intact at the front of a signal chain, and the low output impedance of 10 KOhm is what the maker gives for driving what follows it1.
"It's an active volume pedal that can mute and amplify input signal depending on what mode is selected."
Size, weight and power
The pedal is built to travel: AMT gives its size as 110x62x58 mm and says it "easily fits into gig bag"1. Weight is 0.45 kg without the battery1.
The LLM-2 ZERO runs on a stabilized 9-12V DC supply or a 9V battery, and draws only 6mA1. The weight figure is given without the battery fitted, so a fitted 9V battery adds to that.
AMT says the design was "created in close collaboration with musicians"1. The LLM-2 ZERO is a compact sibling to the full-size AMT Electronics AMT LLM-2, which the maker's media center describes as having L/R channels per preset with one IR cab simulation covering both channels2. For other takes on the volume pedal format, see the site's pages on Volume Pedals, the Ernie Ball MVP and the Boss FV-500H.
Videos
The Guitar Trader
Eugene Odnoval
Richar Perez
Questions
Does the AMT LLM-2 ZERO run on a battery?
Yes. AMT Electronics says the pedal is powered by a stabilized 9-12V DC power supply or a 9V battery, so it can run without an external supply. Its weight is given as 0.45 kg without the battery, which suggests the battery sits inside the pedal.
How much current does the AMT LLM-2 ZERO draw?
AMT Electronics lists low power consumption of 6mA. That is light enough for most pedalboard power supplies, and it is one reason the pedal can also run from a 9V battery.
Can the AMT LLM-2 ZERO boost the signal?
Yes, depending on the range selected. The switch offers three output ranges, and the top one runs from +12dB down to complete silence, so in that mode the pedal can amplify the input signal as well as cut it. The other two ranges run from +6dB and from 0dB, each down to silence.
What is an optical volume pedal?
An optical volume pedal controls level with an optical element rather than a mechanical potentiometer in the signal path, which avoids the scratchy, worn-sounding sweep that dirt causes in conventional volume pedals. AMT Electronics describes the LLM-2 ZERO as an optical volume control pedal with an active volume circuit for guitar and keyboards.
How much does the AMT LLM-2 ZERO weigh?
AMT Electronics lists the weight as 0.45 kg without the battery. The pedal measures 110x62x58 mm, a size the maker says easily fits into a gig bag.
Sources (3)
- AMT LLM-2, AMT Electronics, 2026
- AMT LLM-2, AMT Electronics media center
- AMT LLM-2 Volume Pedal Demo, Media center of AMT Electronics
