The Utopia Effects LASAtronix is an analog compressor pedal based on the legendary LA-2A studio compressor. Utopia Effects describes it as an optical compressor: a circuit that excites a set of LEDs from the attack of the notes, sensitizing a set of photocells that cause the signal to be compressed. That is the same working principle behind the LA-2A, the optical tube compressor and limiter that Universal Audio also brought to the pedalboard as the Universal Audio Teletronix LA-2A Studio Compressor12.
How it compresses
Utopia Effects says the pedal's preamp reproduces the characteristics of the LA-2A, producing a light and warm coloration of the signal and introducing harmonic distortion. The maker characterizes the compression as unlike any other traditionally known, extremely smooth and gradually adding to your signal, instead of destroying all dynamics1.
For players used to faster, firmer compressors, that optical character is the point: the LA-2A design reacts to the note rather than clamping it, which is why it has stayed a studio reference since the days of the original hardware. The same design was featured on a That Pedal Show compressor episode in March 2024 that looked beyond the MXR Dyna Comp and Boss CS-3, alongside the Universal Audio LA-2A pedal, the 1176 and the Origin Cali763.
Controls
| Control | What it does |
|---|---|
| Blend | Sets the mix of compressed and dry signal for parallel compression1 |
| Hi-Cut | Shapes the top end of the compressed signal1 |
RockBoard's PedalPedia says that through its Blend and Hi-Cut controls, the LASAtronix allows for quite extreme compression adjustments without resulting in unwanted artifacts, giving the pedal more range than the gentle settings its LA-2A heritage might suggest1.
The Blend control is what makes parallel compression possible here: you can run heavy compression and mix it back under the dry signal, rather than committing to one compressed sound.
Power
The LASAtronix runs on 9V DC, center negative, and draws 30mA1. That is a standard pedal supply voltage, so it fits a normal pedalboard power setup, though a daisy-chain output shared with several pedals should have the headroom for its 30mA draw.
The LA-2A connection
The LASAtronix is not the only pedalboard take on the LA-2A. Universal Audio's Teletronix LA-2A Studio Compressor pedal is described by its maker as an authentic emulation of the iconic Teletronix LA-2A optical tube compressor/limiter, captured in a compact stompbox and voiced to precisely match the original hand-wired hardware. It adds a Dry Mix control for easy parallel compression effects2. Players comparing the two are choosing between Utopia's analog LED-and-photocell circuit and Universal Audio's emulation of the original unit12.
Videos
Guilherme Spilack
PedalquestBR
Questions
What is the Utopia Effects LASAtronix based on?
The LASAtronix is based on the legendary LA-2A studio compressor. Utopia Effects describes it as an optical compressor whose preamp reproduces the characteristics of the LA-2A, adding a light and warm coloration to the signal along with some harmonic distortion. The same LA-2A design also inspired the Universal Audio Teletronix LA-2A Studio Compressor pedal.
Is the LASAtronix analog or digital?
The LASAtronix is an analog pedal. Its compression comes from a circuit that excites a set of LEDs from the attack of the notes, sensitizing a set of photocells that cause the signal to be compressed, which is the optical approach the LA-2A made famous.
What power does the LASAtronix use?
The LASAtronix runs on 9V DC with a center-negative plug, the same standard supply most pedalboards use.
How much current does the LASAtronix draw?
The LASAtronix draws 30mA, according to the maker's product listing. That is modest by pedal standards, but worth checking against the budget of a shared power supply output.
Does the LASAtronix have a blend control?
Yes. The LASAtronix has a Blend control, and Utopia Effects says that through its Blend and Hi-Cut controls the pedal allows for quite extreme compression adjustments without unwanted side effects.
Sources (3)
- LASAtronix by Utopia Effects, RockBoard PedalPedia, 2026
- Teletronix LA-2A Studio Compressor Pedal, Universal Audio
- Beyond The MXR Dyna Comp & Boss CS-3 Compressor J Rockett Airchild, UA LA-2A, 1176 & Origin Cali76, That Pedal Show, 2024-03-22
